CVE-2021-35940: Apache Portable Runtime (APR): Regression of CVE-2017-12613

[Joe Orton <jorton () apache org>]

Description:

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.

Credit:

The Apache Portable Runtime project would like to thank Iveta Cesalova (Red Hat) for reporting this issue.

References:

http://svn.apache.org/viewvc?view=revision&revision=1891198 
http://mail-archives.apache.org/mod_mbox/www-announce/201710.mbox/%3CCACsi251B8UaLvM-rrH9fv57-zWi0zhyF3275_jPg1a9VEVVoxw
 () mail gmail com%3E
https://dist.apache.org/repos/dist/release/apr/patches/apr-1.7.0-CVE-2021-35940.patch