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USN-786-1: apr-util vulnerabilities

10 June 2009

apr-util vulnerabilities

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Releases

Packages

Details

Matthew Palmer discovered an underflow flaw in apr-util. An attacker could
cause a denial of service via application crash in Apache using a crafted
SVNMasterURI directive, .htaccess file, or when using mod_apreq2.
Applications using libapreq2 are also affected. (CVE-2009-0023)

It was discovered that the XML parser did not properly handle entity
expansion. A remote attacker could cause a denial of service via memory
resource consumption by sending a crafted request to an Apache server
configured to use mod_dav or mod_dav_svn. (CVE-2009-1955)

C. Michael Pilato discovered an off-by-one buffer overflow in apr-util when
formatting certain strings. For big-endian machines (powerpc, hppa and
sparc in Ubuntu), a remote attacker could cause a denial of service or
information disclosure leak. All other architectures for Ubuntu are
not considered to be at risk. (CVE-2009-1956)

Reduce your security exposure

Ubuntu Pro provides ten-year security coverage to 25,000+ packages in Main and Universe repositories, and it is free for up to five machines.

Learn more about Ubuntu Pro

Update instructions

The problem can be corrected by updating your system to the following package versions:

Ubuntu 9.04
Ubuntu 8.10
Ubuntu 8.04

After a standard system upgrade you need to restart any services that use
apr-util, such as Apache or svnserve, to effect the necessary changes.

Related notices

  • USN-787-1: apache2, apache2-common, apache2-mpm-worker, libapr0, apache2-mpm-prefork, apache2.2-common, apache2-mpm-perchild, apache2-mpm-event