BNC: Buffer overflow vulnerability

1. Gentoo Linux Security Advisory

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

Updated November 16, 2004

Summary: This is a Gentoo Linux Security Advisory

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