capi4k-utils: Buffer overflow

1. Gentoo Linux Security Advisory

Package	Vulnerable versions	Unaffected versions	Architecture(s)
net-dialup/capi4k-utils	< 20050718-r3	>= 20050718-r3	All supported architectures

Related bugreports: #170870

capi4k-utils is vulnerable to a buffer overflow in the bufprint() function.

2. Impact Information

capi4k-utils is a set of utilities for accessing COMMON-ISDN-API software interfaces for ISDN devices.

The bufprint() function in capi4k-utils fails to properly check boundaries of data coming from CAPI packets.

A local attacker could possibly escalate privileges or cause a Denial of Service by sending a crafted CAPI packet.

3. Resolution Information

There is no known workaround at this time.

All capi4k-utils users should upgrade to the latest version:

Code Listing 3.1: Resolution

# emerge --sync
# emerge --ask --oneshot --verbose ">=net-dialup/capi4k-utils-20050718-r3"

4. References

Page updated April 27, 2007

Summary: This is a Gentoo Linux Security Advisory

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