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Fix CVE-2023-2977: potential buffer overrun in pkcs15 cardos_have_verifyrc_package

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Resolves: rhbz#2211093
This commit is contained in:
Jakub Jelen 2023-06-14 10:10:18 +02:00
parent 35ab3f2c97
commit e8380080fc
2 changed files with 53 additions and 0 deletions
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50
opensc-0.20.0-CVE-2023-2977.patch Normal file
View File

@ -0,0 +1,50 @@
From 81944d1529202bd28359bede57c0a15deb65ba8a Mon Sep 17 00:00:00 2001
From: fullwaywang <fullwaywang@tencent.com>
Date: Mon, 29 May 2023 10:38:48 +0800
Subject: [PATCH] pkcs15init: correct left length calculation to fix buffer
overrun bug. Fixes #2785
---
src/pkcs15init/pkcs15-cardos.c | 10 +++++-----
1 file changed, 5 insertions(+), 5 deletions(-)
diff --git a/src/pkcs15init/pkcs15-cardos.c b/src/pkcs15init/pkcs15-cardos.c
index 9715cf390f..f41f73c349 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)

3
opensc.spec
View File

@ -34,6 +34,8 @@ Patch15: opensc-0.20.0-calloc0.patch
Patch16: opensc-0.20.0-file-cache.patch
# https://github.com/OpenSC/OpenSC/pull/1929
Patch17: opensc-0.20.0-idprime.patch
# https://github.com/OpenSC/OpenSC/pull/2787
Patch18: opensc-0.20.0-CVE-2023-2977.patch
BuildRequires: pcsc-lite-devel
@ -74,6 +76,7 @@ every software/card that does so, too.
%patch15 -p1 -b .calloc0
%patch16 -p1 -b .file-cache
%patch17 -p1 -b .idprime
%patch18 -p1 -b .CVE-2023-2977
cp -p src/pkcs15init/README ./README.pkcs15init
cp -p src/scconf/README.scconf .