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Date: Mon, 19 Jun 2017 15:17:03 -0700
From: Jacob Champion <jchampion@...che.org>
To: oss-security@...ts.openwall.com
Subject: CVE-2017-7668: Apache httpd 2.x ap_find_token buffer overread
CVE-2017-7668: ap_find_token buffer overread
Severity: Important
Vendor: The Apache Software Foundation
Versions Affected:
httpd 2.2.32
httpd 2.4.24 (unreleased)
httpd 2.4.25
Description:
The HTTP strict parsing changes added in 2.2.32 and 2.4.24 introduced a
bug in token list parsing, which allows ap_find_token() to search past
the end of its input string. By maliciously crafting a sequence of
request headers, an attacker may be able to cause a segmentation fault,
or to force ap_find_token() to return an incorrect value.
Mitigation:
2.2.32 users should either apply the patch available at
https://www.apache.org/dist/httpd/patches/apply_to_2.2.32/CVE-2017-7668.patch
or upgrade in the future to 2.2.33, which is currently unreleased.
2.4.25 users should upgrade to 2.4.26.
Credit:
The Apache HTTP Server security team would like to thank Javier Jiménez
(javijmor@...il.com) for reporting this issue.
References:
https://httpd.apache.org/security_report.html
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