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Debian Security Advisory DSA 148-1 (hylafax)
Information
Severity
Severity
Family
Family
CVSSv2 Base
CVSSv2 Base
CVSSv2 Vector
CVSSv2 Vector
Solution Type
Solution Type
Created
Created
Modified
Modified
Summary
The remote host is missing an update to hylafax announced via advisory DSA 148-1.
Insight
Insight
A set of problems have been discovered in Hylafax, a flexible client/server fax software distributed with many GNU/Linux distributions. Quoting SecurityFocus the problems are in detail: * A format string vulnerability makes it possible for users to potentially execute arbitrary code on some implementations. Due to insufficient checking of input, it's possible to execute a format string attack. Since this only affects systems with the faxrm and faxalter programs installed setuid, Debian is not vulnerable. * A buffer overflow has been reported in Hylafax. A malicious fax transmission may include a long scan line that will overflow a memory buffer, corrupting adjacent memory. An exploid may result in a denial of service condition, or possibly the execution of arbitrary code with root privileges. * A format string vulnerability has been discovered in faxgetty. Incoming fax messages include a Transmitting Subscriber Identification (TSI) string, used to identify the sending fax machine. Hylafax uses this data as part of a format string without properly sanitizing the input. Malicious fax data may cause the server to crash, resulting in a denial of service condition. * Marcin Dawcewicz discovered a format string vulnerability in hfaxd, which will crash hfaxd under certain circumstances. Since Debian doesn't have hfaxd installed setuid root, this problem can not directly lead into a vulnerability. This has been fixed by Darren Nickerson, which was already present in newer versions, but not in the potato version. These problems have been fixed in version 4.0.2-14.3 for the old stable distribution (potato), in version 4.1.1-1.1 for the current stable distribution (woody) and in version 4.1.2-2.1 for the unstable distribution (sid). We recommend that you upgrade your hylafax packages.
Solution
Solution
https://secure1.securityspace.com/smysecure/catid.html?in=DSA%20148-1