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fix CVE-2021-35942. wordexp: Use strtoul instead of atoi so that overflow can be detected.

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liqingqing_1229 2021-07-01 14:26:02 +08:00
parent 90b78e8b57
commit c4279fb077
2 changed files with 49 additions and 1 deletions
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43
backport-CVE-2021-35942-wordexp-handle-overflow-in-positional-parameter-numb.patch Normal file
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@ -0,0 +1,43 @@
From 5adda61f62b77384718b4c0d8336ade8f2b4b35c Mon Sep 17 00:00:00 2001
From: Andreas Schwab <schwab@linux-m68k.org>
Date: Fri, 25 Jun 2021 15:02:47 +0200
Subject: [PATCH] wordexp: handle overflow in positional parameter number (bug
28011)
Use strtoul instead of atoi so that overflow can be detected.
Conflict:NA
Reference:https://sourceware.org/git/?p=glibc.git;a=commitdiff_plain;h=5adda61f62b77384718b4c0d8336ade8f2b4b35c
---
posix/wordexp-test.c | 1 +
posix/wordexp.c | 2 +-
2 files changed, 2 insertions(+), 1 deletion(-)
diff --git a/posix/wordexp-test.c b/posix/wordexp-test.c
index f93a546d7e..9df02dbbb3 100644
--- a/posix/wordexp-test.c
+++ b/posix/wordexp-test.c
@@ -183,6 +183,7 @@ struct test_case_struct
{ 0, NULL, "$var", 0, 0, { NULL, }, IFS },
{ 0, NULL, "\"\\n\"", 0, 1, { "\\n", }, IFS },
{ 0, NULL, "", 0, 0, { NULL, }, IFS },
+ { 0, NULL, "${1234567890123456789012}", 0, 0, { NULL, }, IFS },
/* Flags not already covered (testit() has special handling for these) */
{ 0, NULL, "one two", WRDE_DOOFFS, 2, { "one", "two", }, IFS },
diff --git a/posix/wordexp.c b/posix/wordexp.c
index bcbe96e48d..1f3b09f721 100644
--- a/posix/wordexp.c
+++ b/posix/wordexp.c
@@ -1399,7 +1399,7 @@ envsubst:
/* Is it a numeric parameter? */
else if (isdigit (env[0]))
{
- int n = atoi (env);
+ unsigned long n = strtoul (env, NULL, 10);
if (n >= __libc_argc)
/* Substitute NULL. */
--
2.27.0

7
glibc.spec
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@ -60,7 +60,7 @@
##############################################################################
Name: glibc
Version: 2.33
Release: 4
Release: 5
Summary: The GNU libc libraries
License: %{all_license}
URL: http://www.gnu.org/software/glibc/
@ -81,6 +81,7 @@ Patch2: Fix-the-inaccuracy-of-j0f-j1f-y0f-y1f-BZ.patch
Patch6000: backport-posix-tst-rfc3484-Fix-compile-failure-linking-to-loc.patch
Patch6001: backport-Use-__pthread_attr_copy-in-mq_notify-bug-27896.patch
Patch6002: backport-Fix-use-of-__pthread_attr_copy-in-mq_notify-bug-27896.patch
Patch6003: backport-CVE-2021-35942-wordexp-handle-overflow-in-positional-parameter-numb.patch
Patch9000: turn-REP_STOSB_THRESHOLD-from-2k-to-1M.patch
Patch9001: delete-no-hard-link-to-avoid-all_language-package-to.patch
@ -1172,6 +1173,10 @@ fi
%doc hesiod/README.hesiod
%changelog
* Thu Jul 1 2021 QingqingLi<liqingqing3@huawei.com> - 2.33-5
- wordexp: Use strtoul instead of atoi so that overflow can be detected. (bug 28011)
https://sourceware.org/bugzilla/show_bug.cgi?id=28011
* Fri Jun 18 2021 Qingqing Li<liqingqing3@huawei.com> - 2.33-4
- fix CVE-2021-33574(bug 27896)
https://sourceware.org/bugzilla/show_bug.cgi?id=27896