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Home >> Browse Vulnerability Assessment Database >> Gentoo Local Security Checks >> [GLSA-200406-07] Subversion: Remote heap overflow


Vulnerability Assessment Details

[GLSA-200406-07] Subversion: Remote heap overflow

Vulnerability Assessment Summary
Subversion: Remote heap overflow

Detailed Explanation for this Vulnerability Assessment
The remote host is affected by the vulnerability described in GLSA-200406-07
(Subversion: Remote heap overflow)


The svn protocol parser trusts the indicated length of a URI string sent by
a client. This permits a client to specify a very long string, thereby
causing svnserve to allocate enough memory to hold that string. This may
cause a Denial of Service. Alternately, given a string that causes an
integer overflow in the variable holding the string length, the server
might allocate less memory than required, permiting a heap overflow. This
heap overflow may then be exploitable, permiting remote code execution. The
attacker does not need read or write access to the Subversion repository
being served, since even un-authenticated users can send svn protocol
requests.

Impact

Ranges from remote Denial of Service to potential arbitrary code execution
with rights of the svnserve process.

Workaround

Servers without svnserve running are not vulnerable. Disable svnserve and
use DAV for access instead.

References:
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2004-0413


Solution:
All users should upgrade to the latest version of Subversion.
# emerge sync
# emerge -pv ">=dev-util/subversion-1.0.4-r1"
# emerge ">=dev-util/subversion-1.0.4-r1"


Network Security Threat Level: High


Networks Security ID:

Vulnerability Assessment Copyright: (C) 2005 Michel Arboi

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