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[ GLSA 200701-14 ] Mod_auth_kerb: Denial of Service
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GLSA
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PostPosted: Mon Jan 22, 2007 11:26 pm    Post subject: [ GLSA 200701-14 ] Mod_auth_kerb: Denial of Service Reply with quote

Gentoo Linux Security Advisory

Title: Mod_auth_kerb: Denial of Service (GLSA 200701-14)
Severity: normal
Exploitable: remote
Date: January 22, 2007
Updated: December 30, 2007
Bug(s): #155782
ID: 200701-14

Synopsis


Mod_auth_kerb is vulnerable to a buffer overflow possibly allowing a Denial
of Service.


Background


Mod_auth_kerb is an Apache authentication module using Kerberos.


Affected Packages

Package: www-apache/mod_auth_kerb
Vulnerable: < 5.0_rc7-r1
Unaffected: >= 5.0_rc7-r1
Architectures: All supported architectures


Description


Mod_auth_kerb improperly handles component byte encoding in the
der_get_oid() function, allowing for a buffer overflow to occur if
there are no components which require more than one byte for encoding.


Impact


An attacker could try to access a Kerberos protected resource on an
Apache server with an incorrectly configured service principal and
crash the server process. It is important to note that this buffer
overflow is not known to allow for the execution of code.


Workaround


There is no known workaround at this time.


Resolution


All mod_auth_kerb users should upgrade to the latest version:
Code:
# emerge --sync
    # emerge --ask --oneshot --verbose ">=www-apache/mod_auth_kerb-5.0_rc7-r1"


References

CVE-2006-5989


Last edited by GLSA on Sat Jul 28, 2012 4:23 am; edited 5 times in total
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