Referenced CVEs:
CVE-2009-0023, CVE-2009-1955, CVE-2009-1956


Description:
===========================================================Ubuntu Security Notice USN-786-1 June 10, 2009apr-util vulnerabilitiesCVE-2009-0023, CVE-2009-1955, CVE-2009-1956===========================================================A security issue affects the following Ubuntu releases:Ubuntu 8.04 LTSUbuntu 8.10Ubuntu 9.04This advisory also applies to the corresponding versions ofKubuntu, Edubuntu, and Xubuntu.The problem can be corrected by upgrading your system to thefollowing package versions:Ubuntu 8.04 LTS: libaprutil1 1.2.12+dfsg-3ubuntu0.1Ubuntu 8.10: libaprutil1 1.2.12+dfsg-7ubuntu0.1Ubuntu 9.04: libaprutil1 1.2.12+dfsg-8ubuntu0.1After a standard system upgrade you need to restart any services that useapr-util, such as Apache or svnserve, to effect the necessary changes.Details follow:Matthew Palmer discovered an underflow flaw in apr-util. An attacker couldcause a denial of service via application crash in Apache using a craftedSVNMasterURI 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 entityexpansion. A remote attacker could cause a denial of service via memoryresource consumption by sending a crafted request to an Apache serverconfigured to use mod_dav or mod_dav_svn. (CVE-2009-1955)C. Michael Pilato discovered an off-by-one buffer overflow in apr-util whenformatting certain strings. For big-endian machines (powerpc, hppa andsparc in Ubuntu), a remote attacker could cause a denial of service orinformation disclosure leak. All other architectures for Ubuntu arenot considered to be at risk. (CVE-2009-1956)





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