Two vulnerabilities have been reported in Apache HTTP Server, which can be exploited by malicious people to cause a DoS (Denial of Service) and compromise a vulnerable system.
1) An error within the "do_rewritelog()" function (modules/mappers/mod_rewrite.c) does not properly handle certain escape sequences when writing to the log file and can be exploited to execute arbitrary commands by sending a specially crafted HTTP request.
Successful exploitation of this vulnerability requires a user to view the log file in a terminal emulator.
2) An error when handling a MERGE request within modules/dav/main/mod_dav.c can be exploited to cause a segmentation fault via a specially crafted MERGE request containing a URI that is not configured for DAV within the source href of the XML body.
The vulnerabilities are reported in versions prior to 2.2.25.
Solution: Update to version 2.2.25.
Provided and/or discovered by: 1) Disclosed by Joe Orton in a SVN commit. The vendor additionally credits Eric Covener and Jeff Trawick.
2) The vendor credits Ben Reser.
Original Advisory: Apache:
Joe Orton SVN Commit:
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Subject: Apache HTTP Server mod_rewrite and mod_dav Vulnerabilities
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