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capi4k-utils: Buffer overflow


1.  Gentoo Linux Security Advisory

Version Information

Advisory Reference GLSA 200704-23 / capi4k-utils
Release Date April 27, 2007
Latest Revision April 27, 2007: 01
Impact high
Exploitable local
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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