A flaw [1] was found in mod_log_config. If an administrator configured the "%{cookiename}C" log format string to be used, a remote attacker could send a specific cookie which would cause a crash. This crash would only be a denial of service if using a threaded MPM (such as event or worker). Note that Red Hat Enterprise Linux and Fedora use the prefork MPM by default. This will be fixed upstream [2] in 2.2.22 and affects versions 2.2.17 up to and including 2.2.21. [1] https://issues.apache.org/bugzilla/show_bug.cgi?id=52256 [2] http://svn.apache.org/viewvc?view=revision&revision=1227292 Statement: Not vulnerable. This issue did not affect the versions of httpd as shipped with Red Hat Enterprise Linux 4, 5, or 6.
Created httpd tracking bugs for this issue Affects: fedora-all [bug 785067]
====================================================== Name: CVE-2012-0021 The log_cookie function in mod_log_config.c in the mod_log_config module in the Apache HTTP Server 2.2.17 through 2.2.21, when a threaded MPM is used, does not properly handle a %{}C format string, which allows remote attackers to cause a denial of service (daemon crash) via a cookie that lacks both a name and a value.
(In reply to comment #0) > This will be fixed upstream [2] in 2.2.22 and affects versions 2.2.17 up to and > including 2.2.21. This problem was introduced upstream via: http://svn.apache.org/viewvc?view=revision&revision=988403 https://issues.apache.org/bugzilla/show_bug.cgi?id=28037
This issue has been addressed in following products: JBoss Enterprise Web Server 1.0.2 Via RHSA-2012:0543 https://rhn.redhat.com/errata/RHSA-2012-0543.html
This issue has been addressed in following products: JBEWS 1.0 for RHEL 5 JBEWS 1.0 for RHEL 6 Via RHSA-2012:0542 https://rhn.redhat.com/errata/RHSA-2012-0542.html