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AUSCERT External Security Bulletin Redistribution
CVE-2021-35940: Apache Portable Runtime (APR): Regression of CVE-2017-12613
24 August 2021
AusCERT Security Bulletin Summary
Product: Apache Portable Runtime (APR)
Publisher: Apache Software Foundation
Operating System: UNIX variants (UNIX, Linux, OSX)
Impact/Access: Access Confidential Data -- Existing Account
Denial of Service -- Existing Account
CVE Names: 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
The patch below addresses the issue:
The Apache Portable Runtime project would like to thank Iveta Cesalova
(Red Hat) for reporting this issue.
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