f68dd54569
CVE-2018-0739 CVE-2019-1563 CVE-2020-1971 CVE-2021-23840 CVE-2021-23841 CVE-2022-0778 CVE-2021-3712 (cherry picked from commit a582068887203f626772052e466343c6ef2d0719)
95 lines
2.9 KiB
Diff
95 lines
2.9 KiB
Diff
From 84743d3e7fae623c0a20bd727ec6e8c4031bf42f Mon Sep 17 00:00:00 2001
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From: Matt Caswell <matt@openssl.org>
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Date: Wed, 11 Nov 2020 16:12:58 +0000
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Subject: [PATCH] Correctly compare EdiPartyName in GENERAL_NAME_cmp()
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If a GENERAL_NAME field contained EdiPartyName data then it was
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incorrectly being handled as type "other". This could lead to a
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segmentation fault.
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Many thanks to David Benjamin from Google for reporting this issue.
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CVE-2020-1971
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---
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crypto/x509v3/v3_genn.c | 45 ++++++++++++++++++++++++++++++++++++++---
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1 file changed, 42 insertions(+), 3 deletions(-)
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--- a/Cryptlib/OpenSSL/crypto/x509v3/v3_genn.c
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+++ b/Cryptlib/OpenSSL/crypto/x509v3/v3_genn.c
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@@ -108,6 +108,37 @@ GENERAL_NAME *GENERAL_NAME_dup(GENERAL_N
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(char *)a);
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}
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+static int edipartyname_cmp(const EDIPARTYNAME *a, const EDIPARTYNAME *b)
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+{
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+ int res;
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+
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+ if (a == NULL || b == NULL) {
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+ /*
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+ * Shouldn't be possible in a valid GENERAL_NAME, but we handle it
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+ * anyway. OTHERNAME_cmp treats NULL != NULL so we do the same here
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+ */
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+ return -1;
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+ }
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+ if (a->nameAssigner == NULL && b->nameAssigner != NULL)
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+ return -1;
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+ if (a->nameAssigner != NULL && b->nameAssigner == NULL)
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+ return 1;
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+ /* If we get here then both have nameAssigner set, or both unset */
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+ if (a->nameAssigner != NULL) {
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+ res = ASN1_STRING_cmp(a->nameAssigner, b->nameAssigner);
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+ if (res != 0)
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+ return res;
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+ }
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+ /*
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+ * partyName is required, so these should never be NULL. We treat it in
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+ * the same way as the a == NULL || b == NULL case above
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+ */
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+ if (a->partyName == NULL || b->partyName == NULL)
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+ return -1;
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+
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+ return ASN1_STRING_cmp(a->partyName, b->partyName);
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+}
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+
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/* Returns 0 if they are equal, != 0 otherwise. */
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int GENERAL_NAME_cmp(GENERAL_NAME *a, GENERAL_NAME *b)
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{
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@@ -117,8 +148,11 @@ int GENERAL_NAME_cmp(GENERAL_NAME *a, GE
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return -1;
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switch (a->type) {
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case GEN_X400:
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+ result = ASN1_TYPE_cmp(a->d.x400Address, b->d.x400Address);
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+ break;
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+
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case GEN_EDIPARTY:
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- result = ASN1_TYPE_cmp(a->d.other, b->d.other);
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+ result = edipartyname_cmp(a->d.ediPartyName, b->d.ediPartyName);
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break;
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case GEN_OTHERNAME:
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@@ -165,8 +199,11 @@ void GENERAL_NAME_set0_value(GENERAL_NAM
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{
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switch (type) {
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case GEN_X400:
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+ a->d.x400Address = value;
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+ break;
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+
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case GEN_EDIPARTY:
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- a->d.other = value;
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+ a->d.ediPartyName = value;
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break;
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case GEN_OTHERNAME:
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@@ -200,8 +237,10 @@ void *GENERAL_NAME_get0_value(GENERAL_NA
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*ptype = a->type;
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switch (a->type) {
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case GEN_X400:
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+ return a->d.x400Address;
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+
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case GEN_EDIPARTY:
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- return a->d.other;
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+ return a->d.ediPartyName;
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case GEN_OTHERNAME:
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return a->d.otherName;
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