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BNC: Buffer overflow vulnerability


1.  Gentoo Linux Security Advisory

Version Information

Advisory Reference GLSA 200411-24 / BNC
Release Date November 16, 2004
Latest Revision November 16, 2004: 01
Impact high
Exploitable remote
Package Vulnerable versions Unaffected versions Architecture(s)
net-irc/bnc < 2.9.1 >= 2.9.1 All supported architectures

Related bugreports: #70674


BNC contains a buffer overflow vulnerability that may lead to Denial of Service and execution of arbitrary code.

2.  Impact Information


BNC (BouNCe) is an IRC proxy server.


Leon Juranic discovered that BNC fails to do proper bounds checking when checking server response.


An attacker could exploit this to cause a Denial of Service and potentially execute arbitary code with the permissions of the user running BNC.

3.  Resolution Information


There is no known workaround at this time.


All BNC users should upgrade to the latest version:

Code Listing 3.1: Resolution

# emerge --sync
# emerge --ask --oneshot --verbose ">=net-irc/bnc-2.9.1"

4.  References


Page updated November 16, 2004

Summary: This is a Gentoo Linux Security Advisory

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