!119 [sync] PR-114: fix CVE-2023-42364 CVE-2023-42365 CVE-2023-42366 CVE-2023-42363

From: @openeuler-sync-bot 
Reviewed-by: @xuxuepeng 
Signed-off-by: @xuxuepeng

backport-CVE-2022-48174.patch

@@ -0,0 +1,77 @@
+From 4bfb95d9c2f8f80cc2d1e282823ce49c25f7e784 Mon Sep 17 00:00:00 2001
+From: songbuhuang <544824346@qq.com>
+Date: Thu, 31 Aug 2023 12:08:23 +0800
+Subject: [PATCH] fix CVE-2022-48174
+
+Signed-off-by: songbuhuang <544824346@qq.com>
+---
+ shell/math.c | 39 +++++++++++++++++++++++++++++++++++----
+ 1 file changed, 35 insertions(+), 4 deletions(-)
+
+diff --git a/shell/math.c b/shell/math.c
+index 2942cdd..e9bd62b 100644
+--- a/shell/math.c
++++ b/shell/math.c
+@@ -582,6 +582,28 @@ static arith_t strto_arith_t(const char *nptr, char **endptr)
+ # endif
+ #endif
+ 
++//TODO: much better estimation than expr_len/2? Such as:
++//static unsigned estimate_nums_and_names(const char *expr)
++//{
++//	unsigned count = 0;
++//	while (*(expr = skip_whitespace(expr)) != '\0') {
++//		const char *p;
++//		if (isdigit(*expr)) {
++//			while (isdigit(*++expr))
++//				continue;
++//			count++;
++//			continue;
++//		}
++//		p = endofname(expr);
++//		if (p != expr) {
++//			expr = p;
++//			count++;
++//			continue;
++//		}
++//	}
++//	return count;
++//}
++
+ static arith_t
+ evaluate_string(arith_state_t *math_state, const char *expr)
+ {
+@@ -589,10 +611,12 @@ evaluate_string(arith_state_t *math_state, const char *expr)
+ 	const char *errmsg;
+ 	const char *start_expr = expr = skip_whitespace(expr);
+ 	unsigned expr_len = strlen(expr) + 2;
+-	/* Stack of integers */
+-	/* The proof that there can be no more than strlen(startbuf)/2+1
+-	 * integers in any given correct or incorrect expression
+-	 * is left as an exercise to the reader. */
++	/* Stack of integers/names */
++	/* There can be no more than strlen(startbuf)/2+1
++	 * integers/names in any given correct or incorrect expression.
++	 * (modulo "09v09v09v09v09v" case,
++	 * but we have code to detect that early)
++	 */
+ 	var_or_num_t *const numstack = alloca((expr_len / 2) * sizeof(numstack[0]));
+ 	var_or_num_t *numstackptr = numstack;
+ 	/* Stack of operator tokens */
+@@ -661,6 +685,13 @@ evaluate_string(arith_state_t *math_state, const char *expr)
+ 			numstackptr->var = NULL;
+ 			errno = 0;
+ 			numstackptr->val = strto_arith_t(expr, (char**) &expr);
++			/* A number can't be followed by another number, or a variable name.
++			 * We'd catch this later anyway, but this would require numstack[]
++			 * to be twice as deep to handle strings where _every_ char is
++			 * a new number or name. Example: 09v09v09v09v09v09v09v09v09v
++			 */
++			if (isalnum(*expr) || *expr == '_')
++				goto err;
+ 			if (errno)
+ 				numstackptr->val = 0; /* bash compat */
+ 			goto num;
+-- 
+2.26.2
+

backport-CVE-2023-42363.patch

@@ -0,0 +1,31 @@
+From c8f999803ab38f97488091ea20d8d2e4967452d2 Mon Sep 17 00:00:00 2001
+From: liuxu <liuxu156@huawei.com>
+Date: Wed, 19 Jun 2024 11:44:32 +0800
+Subject: [PATCH 4/4] awk: fix use after free (CVE-2023-42363)
+
+backport from upstream:
+https://git.alpinelinux.org/aports/plain/main/busybox/0001-awk-fix-use-after-free-CVE-2023-42363.patch
+
+Signed-off-by: liuxu <liuxu156@huawei.com>
+---
+ editors/awk.c | 4 ----
+ 1 file changed, 4 deletions(-)
+
+diff --git a/editors/awk.c b/editors/awk.c
+index 7a73f04..8f146fc 100644
+--- a/editors/awk.c
++++ b/editors/awk.c
+@@ -2944,10 +2944,6 @@ static var *evaluate(node *op, var *res)
+ 				/* yes, remember where Fields[] is */
+ 				old_Fields_ptr = Fields;
+ 			}
+-			if (opinfo & OF_STR1) {
+-				L.s = getvar_s(L.v);
+-				debug_printf_eval("L.s:'%s'\n", L.s);
+-			}
+ 			if (opinfo & OF_NUM1) {
+ 				L_d = getvar_i(L.v);
+ 				debug_printf_eval("L_d:%f\n", L_d);
+-- 
+2.43.0
+

backport-CVE-2023-42364-CVE-2023-42365.patch

@@ -0,0 +1,292 @@
+From 6eabe2d43d464d34df1670192aef6c4966ab1a94 Mon Sep 17 00:00:00 2001
+From: Denys Vlasenko <vda.linux@googlemail.com>
+Date: Tue, 30 May 2023 16:42:18 +0200
+Subject: [PATCH 1/2] awk: fix precedence of = relative to ==
+
+backport from upstream:
+https://git.alpinelinux.org/aports/plain/main/busybox/CVE-2023-42364-CVE-2023-42365.patch
+
+Discovered while adding code to disallow assignments to non-lvalues
+
+function                                             old     new   delta
+parse_expr                                           936     991     +55
+.rodata                                           105243  105247      +4
+------------------------------------------------------------------------------
+(add/remove: 0/0 grow/shrink: 2/0 up/down: 59/0)               Total: 59 bytes
+
+Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
+(cherry picked from commit 0256e00a9d077588bd3a39f5a1ef7e2eaa2911e4)
+---
+ editors/awk.c       | 66 ++++++++++++++++++++++++++++++---------------
+ testsuite/awk.tests |  5 ++++
+ 2 files changed, 50 insertions(+), 21 deletions(-)
+
+diff --git a/editors/awk.c b/editors/awk.c
+index 728ee8685..3f4e0600d 100644
+--- a/editors/awk.c
++++ b/editors/awk.c
+@@ -337,7 +337,9 @@ static void debug_parse_print_tc(uint32_t n)
+ #undef P
+ #undef PRIMASK
+ #undef PRIMASK2
+-#define P(x)      (x << 24)
++/* Smaller 'x' means _higher_ operator precedence */
++#define PRECEDENCE(x) (x << 24)
++#define P(x)      PRECEDENCE(x)
+ #define PRIMASK   0x7F000000
+ #define PRIMASK2  0x7E000000
+ 
+@@ -360,7 +362,7 @@ enum {
+ 	OC_MOVE = 0x1f00,       OC_PGETLINE = 0x2000,   OC_REGEXP = 0x2100,
+ 	OC_REPLACE = 0x2200,    OC_RETURN = 0x2300,     OC_SPRINTF = 0x2400,
+ 	OC_TERNARY = 0x2500,    OC_UNARY = 0x2600,      OC_VAR = 0x2700,
+-	OC_DONE = 0x2800,
++	OC_CONST = 0x2800,      OC_DONE = 0x2900,
+ 
+ 	ST_IF = 0x3000,         ST_DO = 0x3100,         ST_FOR = 0x3200,
+ 	ST_WHILE = 0x3300
+@@ -440,9 +442,9 @@ static const uint32_t tokeninfo[] ALIGN4 = {
+ #define TI_PREINC (OC_UNARY|xV|P(9)|'P')
+ #define TI_PREDEC (OC_UNARY|xV|P(9)|'M')
+ 	TI_PREINC,               TI_PREDEC,               OC_FIELD|xV|P(5),
+-	OC_COMPARE|VV|P(39)|5,   OC_MOVE|VV|P(74),        OC_REPLACE|NV|P(74)|'+', OC_REPLACE|NV|P(74)|'-',
+-	OC_REPLACE|NV|P(74)|'*', OC_REPLACE|NV|P(74)|'/', OC_REPLACE|NV|P(74)|'%', OC_REPLACE|NV|P(74)|'&',
+-	OC_BINARY|NV|P(29)|'+',  OC_BINARY|NV|P(29)|'-',  OC_REPLACE|NV|P(74)|'&', OC_BINARY|NV|P(15)|'&',
++	OC_COMPARE|VV|P(39)|5,   OC_MOVE|VV|P(38),        OC_REPLACE|NV|P(38)|'+', OC_REPLACE|NV|P(38)|'-',
++	OC_REPLACE|NV|P(38)|'*', OC_REPLACE|NV|P(38)|'/', OC_REPLACE|NV|P(38)|'%', OC_REPLACE|NV|P(38)|'&',
++	OC_BINARY|NV|P(29)|'+',  OC_BINARY|NV|P(29)|'-',  OC_REPLACE|NV|P(38)|'&', OC_BINARY|NV|P(15)|'&',
+ 	OC_BINARY|NV|P(25)|'/',  OC_BINARY|NV|P(25)|'%',  OC_BINARY|NV|P(15)|'&',  OC_BINARY|NV|P(25)|'*',
+ 	OC_COMPARE|VV|P(39)|4,   OC_COMPARE|VV|P(39)|3,   OC_COMPARE|VV|P(39)|0,   OC_COMPARE|VV|P(39)|1,
+ #define TI_LESS     (OC_COMPARE|VV|P(39)|2)
+@@ -1290,7 +1292,7 @@ static uint32_t next_token(uint32_t expected)
+ 			save_tclass = tc;
+ 			save_info = t_info;
+ 			tc = TC_BINOPX;
+-			t_info = OC_CONCAT | SS | P(35);
++			t_info = OC_CONCAT | SS | PRECEDENCE(35);
+ 		}
+ 
+ 		t_tclass = tc;
+@@ -1350,9 +1352,8 @@ static node *parse_expr(uint32_t term_tc)
+ {
+ 	node sn;
+ 	node *cn = &sn;
+-	node *vn, *glptr;
++	node *glptr;
+ 	uint32_t tc, expected_tc;
+-	var *v;
+ 
+ 	debug_printf_parse("%s() term_tc(%x):", __func__, term_tc);
+ 	debug_parse_print_tc(term_tc);
+@@ -1363,11 +1364,12 @@ static node *parse_expr(uint32_t term_tc)
+ 	expected_tc = TS_OPERAND | TS_UOPPRE | TC_REGEXP | term_tc;
+ 
+ 	while (!((tc = next_token(expected_tc)) & term_tc)) {
++		node *vn;
+ 
+ 		if (glptr && (t_info == TI_LESS)) {
+ 			/* input redirection (<) attached to glptr node */
+ 			debug_printf_parse("%s: input redir\n", __func__);
+-			cn = glptr->l.n = new_node(OC_CONCAT | SS | P(37));
++			cn = glptr->l.n = new_node(OC_CONCAT | SS | PRECEDENCE(37));
+ 			cn->a.n = glptr;
+ 			expected_tc = TS_OPERAND | TS_UOPPRE;
+ 			glptr = NULL;
+@@ -1379,24 +1381,42 @@ static node *parse_expr(uint32_t term_tc)
+ 			 * previous operators with higher priority */
+ 			vn = cn;
+ 			while (((t_info & PRIMASK) > (vn->a.n->info & PRIMASK2))
+-			    || ((t_info == vn->info) && t_info == TI_COLON)
++			    || (t_info == vn->info && t_info == TI_COLON)
+ 			) {
+ 				vn = vn->a.n;
+ 				if (!vn->a.n) syntax_error(EMSG_UNEXP_TOKEN);
+ 			}
+ 			if (t_info == TI_TERNARY)
+ //TODO: why?
+-				t_info += P(6);
++				t_info += PRECEDENCE(6);
+ 			cn = vn->a.n->r.n = new_node(t_info);
+ 			cn->a.n = vn->a.n;
+ 			if (tc & TS_BINOP) {
+ 				cn->l.n = vn;
+-//FIXME: this is the place to detect and reject assignments to non-lvalues.
+-//Currently we allow "assignments" to consts and temporaries, nonsense like this:
+-// awk 'BEGIN { "qwe" = 1 }'
+-// awk 'BEGIN { 7 *= 7 }'
+-// awk 'BEGIN { length("qwe") = 1 }'
+-// awk 'BEGIN { (1+1) += 3 }'
++
++				/* Prevent:
++				 * awk 'BEGIN { "qwe" = 1 }'
++				 * awk 'BEGIN { 7 *= 7 }'
++				 * awk 'BEGIN { length("qwe") = 1 }'
++				 * awk 'BEGIN { (1+1) += 3 }'
++				 */
++				/* Assignment? (including *= and friends) */
++				if (((t_info & OPCLSMASK) == OC_MOVE)
++				 || ((t_info & OPCLSMASK) == OC_REPLACE)
++				) {
++					debug_printf_parse("%s: MOVE/REPLACE vn->info:%08x\n", __func__, vn->info);
++					/* Left side is a (variable or array element)
++					 * or function argument
++					 * or $FIELD ?
++					 */
++					if ((vn->info & OPCLSMASK) != OC_VAR
++					 && (vn->info & OPCLSMASK) != OC_FNARG
++					 && (vn->info & OPCLSMASK) != OC_FIELD
++					) {
++						syntax_error(EMSG_UNEXP_TOKEN); /* no. bad */
++					}
++				}
++
+ 				expected_tc = TS_OPERAND | TS_UOPPRE | TC_REGEXP;
+ 				if (t_info == TI_PGETLINE) {
+ 					/* it's a pipe */
+@@ -1432,6 +1452,8 @@ static node *parse_expr(uint32_t term_tc)
+ 		/* one should be very careful with switch on tclass -
+ 		 * only simple tclasses should be used (TC_xyz, not TS_xyz) */
+ 		switch (tc) {
++			var *v;
++
+ 		case TC_VARIABLE:
+ 		case TC_ARRAY:
+ 			debug_printf_parse("%s: TC_VARIABLE | TC_ARRAY\n", __func__);
+@@ -1452,14 +1474,14 @@ static node *parse_expr(uint32_t term_tc)
+ 		case TC_NUMBER:
+ 		case TC_STRING:
+ 			debug_printf_parse("%s: TC_NUMBER | TC_STRING\n", __func__);
+-			cn->info = OC_VAR;
++			cn->info = OC_CONST;
+ 			v = cn->l.v = xzalloc(sizeof(var));
+-			if (tc & TC_NUMBER)
++			if (tc & TC_NUMBER) {
+ 				setvar_i(v, t_double);
+-			else {
++			 } else {
+ 				setvar_s(v, t_string);
+-				expected_tc &= ~TC_UOPPOST; /* "str"++ is not allowed */
+ 			}
++			expected_tc &= ~TC_UOPPOST; /* NUM++, "str"++ not allowed */
+ 			break;
+ 
+ 		case TC_REGEXP:
+@@ -3088,6 +3110,8 @@ static var *evaluate(node *op, var *res)
+ 
+ 		/* -- recursive node type -- */
+ 
++		case XC( OC_CONST ):
++			debug_printf_eval("CONST ");
+ 		case XC( OC_VAR ):
+ 			debug_printf_eval("VAR\n");
+ 			L.v = op->l.v;
+diff --git a/testsuite/awk.tests b/testsuite/awk.tests
+index bbf0fbff1..a71ef3b26 100755
+--- a/testsuite/awk.tests
++++ b/testsuite/awk.tests
+@@ -485,4 +485,9 @@ testing 'awk assign while test' \
+ 	"" \
+ 	"foo"
+ 
++testing "awk = has higher precedence than == (despite what gawk manpage claims)" \
++	"awk 'BEGIN { v=1; print 2==v; print 2==v=2; print v; print v=3==3; print v}'" \
++	'0\n1\n2\n1\n3\n' \
++	'' ''
++
+ exit $FAILCOUNT
+-- 
+2.45.2
+
+
+From 947f3d2d2739afe248bf5343eaf9e35f3fd95dc2 Mon Sep 17 00:00:00 2001
+From: Natanael Copa <ncopa@alpinelinux.org>
+Date: Tue, 21 May 2024 14:46:08 +0200
+Subject: [PATCH 2/2] awk: fix ternary operator and precedence of =
+
+Adjust the = precedence test to match behavior of gawk, mawk and
+FreeBSD.  awk 'BEGIN {print v=3==3; print v}' should print two '1'.
+
+To fix this, and to unbreak the ternary conditional operator, we restore
+the precedence of = in the token list, but override this with a lower
+priority when the assignment is on the right side of a compare.
+
+This fixes commit 0256e00a9d07 (awk: fix precedence of = relative to ==)
+
+Signed-off-by: Natanael Copa <ncopa@alpinelinux.org>
+(cherry picked from commit 1714301c405ef03b39605c85c23f22a190cddd95)
+---
+ editors/awk.c       | 18 ++++++++++++++----
+ testsuite/awk.tests |  9 +++++++--
+ 2 files changed, 21 insertions(+), 6 deletions(-)
+
+diff --git a/editors/awk.c b/editors/awk.c
+index 3f4e0600d..85e0f50cd 100644
+--- a/editors/awk.c
++++ b/editors/awk.c
+@@ -442,9 +442,10 @@ static const uint32_t tokeninfo[] ALIGN4 = {
+ #define TI_PREINC (OC_UNARY|xV|P(9)|'P')
+ #define TI_PREDEC (OC_UNARY|xV|P(9)|'M')
+ 	TI_PREINC,               TI_PREDEC,               OC_FIELD|xV|P(5),
+-	OC_COMPARE|VV|P(39)|5,   OC_MOVE|VV|P(38),        OC_REPLACE|NV|P(38)|'+', OC_REPLACE|NV|P(38)|'-',
+-	OC_REPLACE|NV|P(38)|'*', OC_REPLACE|NV|P(38)|'/', OC_REPLACE|NV|P(38)|'%', OC_REPLACE|NV|P(38)|'&',
+-	OC_BINARY|NV|P(29)|'+',  OC_BINARY|NV|P(29)|'-',  OC_REPLACE|NV|P(38)|'&', OC_BINARY|NV|P(15)|'&',
++#define TI_ASSIGN (OC_MOVE|VV|P(74))
++	OC_COMPARE|VV|P(39)|5,   TI_ASSIGN,               OC_REPLACE|NV|P(74)|'+', OC_REPLACE|NV|P(74)|'-',
++	OC_REPLACE|NV|P(74)|'*', OC_REPLACE|NV|P(74)|'/', OC_REPLACE|NV|P(74)|'%', OC_REPLACE|NV|P(74)|'&',
++	OC_BINARY|NV|P(29)|'+',  OC_BINARY|NV|P(29)|'-',  OC_REPLACE|NV|P(74)|'&', OC_BINARY|NV|P(15)|'&',
+ 	OC_BINARY|NV|P(25)|'/',  OC_BINARY|NV|P(25)|'%',  OC_BINARY|NV|P(15)|'&',  OC_BINARY|NV|P(25)|'*',
+ 	OC_COMPARE|VV|P(39)|4,   OC_COMPARE|VV|P(39)|3,   OC_COMPARE|VV|P(39)|0,   OC_COMPARE|VV|P(39)|1,
+ #define TI_LESS     (OC_COMPARE|VV|P(39)|2)
+@@ -1376,11 +1377,19 @@ static node *parse_expr(uint32_t term_tc)
+ 			continue;
+ 		}
+ 		if (tc & (TS_BINOP | TC_UOPPOST)) {
++			int prio;
+ 			debug_printf_parse("%s: TS_BINOP | TC_UOPPOST tc:%x\n", __func__, tc);
+ 			/* for binary and postfix-unary operators, jump back over
+ 			 * previous operators with higher priority */
+ 			vn = cn;
+-			while (((t_info & PRIMASK) > (vn->a.n->info & PRIMASK2))
++			/* Let assignment get higher priority when used on right
++			 * side in compare. i.e: 2==v=3 */
++			if (t_info == TI_ASSIGN && (vn->a.n->info & OPCLSMASK) == OC_COMPARE) {
++				prio = PRECEDENCE(38);
++			} else {
++				prio = (t_info & PRIMASK);
++			}
++			while ((prio > (vn->a.n->info & PRIMASK2))
+ 			    || (t_info == vn->info && t_info == TI_COLON)
+ 			) {
+ 				vn = vn->a.n;
+@@ -1412,6 +1421,7 @@ static node *parse_expr(uint32_t term_tc)
+ 					if ((vn->info & OPCLSMASK) != OC_VAR
+ 					 && (vn->info & OPCLSMASK) != OC_FNARG
+ 					 && (vn->info & OPCLSMASK) != OC_FIELD
++					 && (vn->info & OPCLSMASK) != OC_COMPARE
+ 					) {
+ 						syntax_error(EMSG_UNEXP_TOKEN); /* no. bad */
+ 					}
+diff --git a/testsuite/awk.tests b/testsuite/awk.tests
+index a71ef3b26..c2f57605b 100755
+--- a/testsuite/awk.tests
++++ b/testsuite/awk.tests
+@@ -485,9 +485,14 @@ testing 'awk assign while test' \
+ 	"" \
+ 	"foo"
+ 
+-testing "awk = has higher precedence than == (despite what gawk manpage claims)" \
++testing "awk = has higher precedence than == on right side" \
+ 	"awk 'BEGIN { v=1; print 2==v; print 2==v=2; print v; print v=3==3; print v}'" \
+-	'0\n1\n2\n1\n3\n' \
++	'0\n1\n2\n1\n1\n' \
++	'' ''
++
++testing 'awk ternary precedence' \
++	"awk 'BEGIN { a = 0 ? \"yes\": \"no\"; print a }'" \
++	'no\n' \
+ 	'' ''
+ 
+ exit $FAILCOUNT
+-- 
+2.45.2
+

backport-CVE-2023-42366.patch

@@ -0,0 +1,37 @@
+From 5cf8b332429a1dd9afef3337bae92aeddaeff993 Mon Sep 17 00:00:00 2001
+From: Valery Ushakov <uwe@stderr.spb.ru>
+Date: Wed, 24 Jan 2024 22:24:41 +0300
+Subject: [PATCH] awk.c: fix CVE-2023-42366 (bug #15874)
+
+backport from upstream:
+https://git.alpinelinux.org/aports/plain/main/busybox/0037-awk.c-fix-CVE-2023-42366-bug-15874.patch
+
+Make sure we don't read past the end of the string in next_token()
+when backslash is the last character in an (invalid) regexp.
+
+https://bugs.busybox.net/show_bug.cgi?id=15874
+---
+ editors/awk.c | 6 ++++--
+ 1 file changed, 4 insertions(+), 2 deletions(-)
+
+diff --git a/editors/awk.c b/editors/awk.c
+index 728ee8685..be48df7c7 100644
+--- a/editors/awk.c
++++ b/editors/awk.c
+@@ -1165,9 +1165,11 @@ static uint32_t next_token(uint32_t expected)
+ 					s[-1] = bb_process_escape_sequence((const char **)&pp);
+ 					if (*p == '\\')
+ 						*s++ = '\\';
+-					if (pp == p)
++					if (pp == p) {
++						if (*p == '\0')
++							syntax_error(EMSG_UNEXP_EOS);
+ 						*s++ = *p++;
+-					else
++					} else
+ 						p = pp;
+ 				}
+ 			}
+-- 
+2.34.1
+

backport-awk-fix-use-after-realloc-CVE-2021-42380-closes-1560.patch

@@ -0,0 +1,99 @@
+From 09656b9beb583eee73b58f64e0e43c0df262c99c Mon Sep 17 00:00:00 2001
+From: liuxu <liuxu156@huawei.com>
+Date: Wed, 19 Jun 2024 11:32:49 +0800
+Subject: [PATCH 3/4] awk: fix use-after-realloc (CVE-2021-42380), closes 15601
+
+backport from upstream:
+https://git.alpinelinux.org/aports/plain/main/busybox/0029-awk-fix-use-after-realloc-CVE-2021-42380-closes-1560.patch
+
+Signed-off-by: liuxu <liuxu156@huawei.com>
+---
+ editors/awk.c | 34 ++++++++++++++++++++++++++++------
+ 1 file changed, 28 insertions(+), 6 deletions(-)
+
+diff --git a/editors/awk.c b/editors/awk.c
+index e1d510c..7a73f04 100644
+--- a/editors/awk.c
++++ b/editors/awk.c
+@@ -558,7 +558,7 @@ struct globals {
+ 	const char *g_progname;
+ 	int g_lineno;
+ 	int nfields;
+-	int maxfields; /* used in fsrealloc() only */
++	unsigned maxfields;
+ 	var *Fields;
+ 	char *g_pos;
+ 	char g_saved_ch;
+@@ -1965,9 +1965,9 @@ static void fsrealloc(int size)
+ {
+ 	int i, newsize;
+ 
+-	if (size >= maxfields) {
+-		/* Sanity cap, easier than catering for overflows */
+-		if (size > 0xffffff)
++	if ((unsigned)size >= maxfields) {
++		/* Sanity cap, easier than catering for over/underflows */
++		if ((unsigned)size > 0xffffff)
+ 			bb_die_memory_exhausted();
+ 
+ 		i = maxfields;
+@@ -2925,6 +2925,7 @@ static var *evaluate(node *op, var *res)
+ 		uint32_t opinfo;
+ 		int opn;
+ 		node *op1;
++		var *old_Fields_ptr;
+ 
+ 		opinfo = op->info;
+ 		opn = (opinfo & OPNMASK);
+@@ -2933,10 +2934,16 @@ static var *evaluate(node *op, var *res)
+ 		debug_printf_eval("opinfo:%08x opn:%08x\n", opinfo, opn);
+ 
+ 		/* execute inevitable things */
++		old_Fields_ptr = NULL;
+ 		if (opinfo & OF_RES1) {
+ 			if ((opinfo & OF_REQUIRED) && !op1)
+ 				syntax_error(EMSG_TOO_FEW_ARGS);
+ 			L.v = evaluate(op1, TMPVAR0);
++			/* Does L.v point to $n variable? */
++			if ((size_t)(L.v - Fields) < maxfields) {
++				/* yes, remember where Fields[] is */
++				old_Fields_ptr = Fields;
++			}
+ 			if (opinfo & OF_STR1) {
+ 				L.s = getvar_s(L.v);
+ 				debug_printf_eval("L.s:'%s'\n", L.s);
+@@ -2955,14 +2962,29 @@ static var *evaluate(node *op, var *res)
+ 		 */
+ 		if (opinfo & OF_RES2) {
+ 			R.v = evaluate(op->r.n, TMPVAR1);
+-			//TODO: L.v may be invalid now, set L.v to NULL to catch bugs?
+-			//L.v = NULL;
++			/* Seen in $5=$$5=$0:
++			 * Evaluation of R.v ($$5=$0 expression)
++			 * made L.v ($5) invalid. It's detected here.
++			 */
++			if (old_Fields_ptr) {
++				//if (old_Fields_ptr != Fields)
++				//	debug_printf_eval("L.v moved\n");
++				L.v += Fields - old_Fields_ptr;
++			}
+ 			if (opinfo & OF_STR2) {
+ 				R.s = getvar_s(R.v);
+ 				debug_printf_eval("R.s:'%s'\n", R.s);
+ 			}
+ 		}
+ 
++		/* Must get L.s after R.v is evaluated in case it realloc's L.v.
++		 * eg: x = (v = "abc",  gsub("b", "X", v));
++		 */
++		if ((opinfo & OF_RES1) && (opinfo & OF_STR1)) {
++			L.s = getvar_s(L.v);
++			debug_printf_eval("L.s:'%s'\n", L.s);
++		}
++
+ 		debug_printf_eval("switch(0x%x)\n", XC(opinfo & OPCLSMASK));
+ 		switch (XC(opinfo & OPCLSMASK)) {
+ 
+-- 
+2.43.0
+

backport-fix-use-after-free-in-bc-module.patch

@@ -0,0 +1,29 @@
+From 907e1b3a22a8092461176af45468c5b1b9bf6cc0 Mon Sep 17 00:00:00 2001
+From: jackey_1024 <jikui2@huawei.com>
+Date: Fri, 28 Oct 2022 09:45:08 +0800
+Subject: [PATCH] busybox: fix use after free in bc module
+
+backport from upstream:
+https://git.busybox.net/busybox/commit/?id=41d5f800a14769704082f7faeabb8435285499be
+
+Signed-off-by: jackey_1024 <jikui2@huawei.com>
+---
+ miscutils/bc.c | 2 ++
+ 1 file changed, 2 insertions(+)
+
+diff --git a/miscutils/bc.c b/miscutils/bc.c
+index f9b08b0..4363585 100644
+--- a/miscutils/bc.c
++++ b/miscutils/bc.c
+@@ -2892,6 +2892,8 @@ static char peek_inbuf(void)
+ 	) {
+ 		xc_read_line(&G.input_buffer, G.prs.lex_input_fp);
+ 		G.prs.lex_inbuf = G.input_buffer.v;
++		// lex_next_at may point to now-freed data, update it:
++		G.prs.lex_next_at = G.prs.lex_inbuf;
+ 		if (G.input_buffer.len <= 1) // on EOF, len is 1 (NUL byte)
+ 			G.prs.lex_input_fp = NULL;
+ 	}
+-- 
+2.25.1
+

busybox.spec

@@ -4,7 +4,7 @@
 %endif
 
 %if "%{!?RELEASE:1}"
-%define RELEASE 16
+%define RELEASE 20
 %endif
 Epoch: 1
 
@@ -22,6 +22,12 @@ Source3: busybox-dynamic.config
 
 Patch6000: backport-CVE-2022-28391.patch
 Patch6001: backport-CVE-2022-30065.patch
+Patch6002: backport-fix-use-after-free-in-bc-module.patch
+Patch6003: backport-CVE-2022-48174.patch
+Patch6004: backport-CVE-2023-42364-CVE-2023-42365.patch
+Patch6005: backport-CVE-2023-42366.patch
+Patch6006: backport-awk-fix-use-after-realloc-CVE-2021-42380-closes-1560.patch
+Patch6007: backport-CVE-2023-42363.patch
 
 BuildRoot:      %_topdir/BUILDROOT
 #Dependency
@@ -97,6 +103,27 @@ install -m 644 docs/busybox.dynamic.1 $RPM_BUILD_ROOT/%{_mandir}/man1/busybox.1
 %{_mandir}/man1/busybox.petitboot.1.gz
 
 %changelog
+* Wed Jun 19 2024 liuxu <liuxu156@huawei.com> - 1:1.34.1-20
+- Type:CVE
+- Id:NA
+- SUG:NA
+- DESC:fix CVE-2023-42364 CVE-2023-42365 CVE-2023-42366 CVE-2023-42363
+
+* Thu Aug 31 2023 huangsong <huangsong14@huawei.com> - 1:1.34.1-19
+- Type:CVE
+- Id:NA
+- SUG:NA
+- DESC:re-fixed CVE-2022-48174
+
+* Wed Aug 30 2023 huangsong <huangsong14@huawei.com> - 1:1.34.1-18
+- Type:CVE
+- Id:NA
+- SUG:NA
+- DESC:fix CVE-2022-48174
+
+* Fri Oct 28 2022 jikui <jikui2@huawei.com> - 1:1.34.1-17
+- fix use after free in bc module
+
 * Fri Aug 19 2022 jikui <jikui2@huawei.com> - 1:1.34.1-16
 - Type:CVE
 - Id:NA