mirrors/meta-openembedded
1
0
Fork 0
mirror of https://github.com/openembedded/meta-openembedded.git synced 2026-06-14 05:49:57 +00:00
Code Issues Projects Releases Wiki Activity

opensc: Fix CVE-2023-2977

Browse Source 
A vulnerbility was found in OpenSC. This security flaw cause a buffer overrun
vulnerability in pkcs15 cardos_have_verifyrc_package. The attacker can supply
a smart card package with malformed ASN1 context. The cardos_have_verifyrc_package
function scans the ASN1 buffer for 2 tags, where remaining length is wrongly
caculated due to moved starting pointer. This leads to possible heap-based buffer
oob read. In cases where ASAN is enabled while compiling this causes a crash.
Further info leak or more damage is possible.

Signed-off-by: Soumya <soumya.sambu@windriver.com>
Signed-off-by: Armin Kuster <akuster808@gmail.com>
This commit is contained in:
Soumya
2023-06-27 11:32:21 +00:00
committed by Armin Kuster
parent 0338bf0c6a
commit ec47660654
2 changed files with 54 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files
meta-oe/recipes-support/opensc/files/CVE-2023-2977.patch
+53
View File
@@ -0,0 +1,53 @@
commit 81944d1529202bd28359bede57c0a15deb65ba8a
Author: fullwaywang <fullwaywang@tencent.com>
Date: Mon May 29 10:38:48 2023 +0800
Subject: [PATCH] pkcs15init: correct left length calculation to fix buffer overrun bug.
Fixes #2785
CVE: CVE-2023-2977
Upstream-Status: Backport [https://github.com/OpenSC/OpenSC/pull/2787/commits/3bf3ab2f9091f984cda6dd910654ccbbe3f06a40]
Signed-off-by: Soumya <soumya.sambu@windriver.com>
---
diff --git a/src/pkcs15init/pkcs15-cardos.c b/src/pkcs15init/pkcs15-cardos.c
index 9715cf39..f41f73c3 100644
--- a/src/pkcs15init/pkcs15-cardos.c
+++ b/src/pkcs15init/pkcs15-cardos.c
@@ -872,7 +872,7 @@ static int cardos_have_verifyrc_package(sc_card_t *card)
sc_apdu_t apdu;
u8 rbuf[SC_MAX_APDU_BUFFER_SIZE];
int r;
- const u8 *p = rbuf, *q;
+ const u8 *p = rbuf, *q, *pp;
size_t len, tlen = 0, ilen = 0;
sc_format_apdu(card, &apdu, SC_APDU_CASE_2_SHORT, 0xca, 0x01, 0x88);
@@ -888,13 +888,13 @@ static int cardos_have_verifyrc_package(sc_card_t *card)
return 0;
while (len != 0) {
- p = sc_asn1_find_tag(card->ctx, p, len, 0xe1, &tlen);
- if (p == NULL)
+ pp = sc_asn1_find_tag(card->ctx, p, len, 0xe1, &tlen);
+ if (pp == NULL)
return 0;
if (card->type == SC_CARD_TYPE_CARDOS_M4_3) {
/* the verifyRC package on CardOS 4.3B use Manufacturer ID 0x01 */
/* and Package Number 0x07 */
- q = sc_asn1_find_tag(card->ctx, p, tlen, 0x01, &ilen);
+ q = sc_asn1_find_tag(card->ctx, pp, tlen, 0x01, &ilen);
if (q == NULL || ilen != 4)
return 0;
if (q[0] == 0x07)
@@ -902,7 +902,7 @@ static int cardos_have_verifyrc_package(sc_card_t *card)
} else if (card->type == SC_CARD_TYPE_CARDOS_M4_4) {
/* the verifyRC package on CardOS 4.4 use Manufacturer ID 0x03 */
/* and Package Number 0x02 */
- q = sc_asn1_find_tag(card->ctx, p, tlen, 0x03, &ilen);
+ q = sc_asn1_find_tag(card->ctx, pp, tlen, 0x03, &ilen);
if (q == NULL || ilen != 4)
return 0;
if (q[0] == 0x02)
meta-oe/recipes-support/opensc/opensc_0.22.0.bb
+1
View File
@@ -14,6 +14,7 @@ LIC_FILES_CHKSUM = "file://COPYING;md5=cb8aedd3bced19bd8026d96a8b6876d7"
#v0.21.0
SRCREV = "c902e1992195e00ada12d71beb1029287cd72037"
SRC_URI = "git://github.com/OpenSC/OpenSC;branch=master;protocol=https \
file://CVE-2023-2977.patch \
"
DEPENDS = "virtual/libiconv openssl"