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package/apr: fix CVE-2021-35940

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An out-of-bounds array read in the apr_time_exp*() functions was fixed
in the Apache Portable Runtime 1.6.3 release (CVE-2017-12613). The fix
for this issue was not carried forward to the APR 1.7.x branch, and
hence version 1.7.0 regressed compared to 1.6.3 and is vulnerable to the
same issue.

Signed-off-by: Fabrice Fontaine <fontaine.fabrice@gmail.com>
Signed-off-by: Arnout Vandecappelle (Essensium/Mind) <arnout@mind.be>
This commit is contained in:
Fabrice Fontaine 2022-03-31 23:00:46 +02:00 committed by Arnout Vandecappelle (Essensium/Mind)
parent 94b5778c82
commit 10d80eb39a
2 changed files with 60 additions and 0 deletions
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57
package/apr/0004-apr-1.7.0-CVE-2021-35940.patch Normal file
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@ -0,0 +1,57 @@
SECURITY: CVE-2021-35940 (cve.mitre.org)
Restore fix for CVE-2017-12613 which was missing in 1.7.x branch, though
was addressed in 1.6.x in 1.6.3 and later via r1807976.
The fix was merged back to 1.7.x in r1891198.
Since this was a regression in 1.7.0, a new CVE name has been assigned
to track this, CVE-2021-35940.
Thanks to Iveta Cesalova <icesalov redhat.com> for reporting this issue.
https://svn.apache.org/viewvc?view=revision&revision=1891198
[Retrieved from:
https://dist.apache.org/repos/dist/release/apr/patches/apr-1.7.0-CVE-2021-35940.patch]
Signed-off-by: Fabrice Fontaine <fontaine.fabrice@gmail.com>
Index: ./time/unix/time.c
===================================================================
--- ./time/unix/time.c (revision 1891197)
+++ ./time/unix/time.c (revision 1891198)
@@ -142,6 +142,9 @@
static const int dayoffset[12] =
{306, 337, 0, 31, 61, 92, 122, 153, 184, 214, 245, 275};
+ if (xt->tm_mon < 0 || xt->tm_mon >= 12)
+ return APR_EBADDATE;
+
/* shift new year to 1st March in order to make leap year calc easy */
if (xt->tm_mon < 2)
Index: ./time/win32/time.c
===================================================================
--- ./time/win32/time.c (revision 1891197)
+++ ./time/win32/time.c (revision 1891198)
@@ -54,6 +54,9 @@
static const int dayoffset[12] =
{0, 31, 59, 90, 120, 151, 181, 212, 243, 273, 304, 334};
+ if (tm->wMonth < 1 || tm->wMonth > 12)
+ return APR_EBADDATE;
+
/* Note; the caller is responsible for filling in detailed tm_usec,
* tm_gmtoff and tm_isdst data when applicable.
*/
@@ -228,6 +231,9 @@
static const int dayoffset[12] =
{306, 337, 0, 31, 61, 92, 122, 153, 184, 214, 245, 275};
+ if (xt->tm_mon < 0 || xt->tm_mon >= 12)
+ return APR_EBADDATE;
+
/* shift new year to 1st March in order to make leap year calc easy */
if (xt->tm_mon < 2)

3
package/apr/apr.mk
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@ -16,6 +16,9 @@ APR_INSTALL_STAGING = YES
# so we need to autoreconf:
APR_AUTORECONF = YES
# 0004-apr-1.7.0-CVE-2021-35940.patch
APR_IGNORE_CVES += CVE-2021-35940
# avoid apr_hints.m4 by setting apr_preload_done=yes and set
# the needed CFLAGS on our own (avoids '-D_REENTRANT' in case
# not supported by toolchain and subsequent configure failure)