Debian Security Advisory

DSA-148-1 hylafax -- buffer overflows and format string vulnerabilities

Date Reported:

12 Aug 2002

Affected Packages:

Vulnerable:

Yes

Security database references:

In the Bugtraq database (at SecurityFocus): BugTraq ID 3357, BugTraq ID 5349, BugTraq ID 5348.
In Mitre's CVE dictionary: CVE-2002-1049, CVE-2002-1050, CVE-2001-1034.

More information:

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 exploit 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 cannot 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.

Fixed in:

Debian GNU/Linux 2.2 (potato)

Source:: http://security.debian.org/pool/updates/main/h/hylafax/hylafax_4.0.2-14.3.dsc; http://security.debian.org/pool/updates/main/h/hylafax/hylafax_4.0.2-14.3.diff.gz; http://security.debian.org/pool/updates/main/h/hylafax/hylafax_4.0.2.orig.tar.gz
Architecture-independent component:: http://security.debian.org/pool/updates/main/h/hylafax/hylafax-doc_4.0.2-14.3_all.deb
Alpha:: http://security.debian.org/pool/updates/main/h/hylafax/hylafax-client_4.0.2-14.3_alpha.deb; http://security.debian.org/pool/updates/main/h/hylafax/hylafax-server_4.0.2-14.3_alpha.deb
ARM:: http://security.debian.org/pool/updates/main/h/hylafax/hylafax-client_4.0.2-14.3_arm.deb; http://security.debian.org/pool/updates/main/h/hylafax/hylafax-server_4.0.2-14.3_arm.deb
Intel IA-32:: http://security.debian.org/pool/updates/main/h/hylafax/hylafax-client_4.0.2-14.3_i386.deb; http://security.debian.org/pool/updates/main/h/hylafax/hylafax-server_4.0.2-14.3_i386.deb
Motorola 680x0:: http://security.debian.org/pool/updates/main/h/hylafax/hylafax-client_4.0.2-14.3_m68k.deb; http://security.debian.org/pool/updates/main/h/hylafax/hylafax-server_4.0.2-14.3_m68k.deb
PowerPC:: http://security.debian.org/pool/updates/main/h/hylafax/hylafax-client_4.0.2-14.3_powerpc.deb; http://security.debian.org/pool/updates/main/h/hylafax/hylafax-server_4.0.2-14.3_powerpc.deb
Sun Sparc:: http://security.debian.org/pool/updates/main/h/hylafax/hylafax-client_4.0.2-14.3_sparc.deb; http://security.debian.org/pool/updates/main/h/hylafax/hylafax-server_4.0.2-14.3_sparc.deb

Debian GNU/Linux 3.0 (woody)

Source:: http://security.debian.org/pool/updates/main/h/hylafax/hylafax_4.1.1-1.1.dsc; http://security.debian.org/pool/updates/main/h/hylafax/hylafax_4.1.1-1.1.diff.gz; http://security.debian.org/pool/updates/main/h/hylafax/hylafax_4.1.1.orig.tar.gz
Architecture-independent component:: http://security.debian.org/pool/updates/main/h/hylafax/hylafax-doc_4.1.1-1.1_all.deb
Alpha:: http://security.debian.org/pool/updates/main/h/hylafax/hylafax-client_4.1.1-1.1_alpha.deb; http://security.debian.org/pool/updates/main/h/hylafax/hylafax-server_4.1.1-1.1_alpha.deb
ARM:: http://security.debian.org/pool/updates/main/h/hylafax/hylafax-client_4.1.1-1.1_arm.deb; http://security.debian.org/pool/updates/main/h/hylafax/hylafax-server_4.1.1-1.1_arm.deb
Intel IA-32:: http://security.debian.org/pool/updates/main/h/hylafax/hylafax-client_4.1.1-1.1_i386.deb; http://security.debian.org/pool/updates/main/h/hylafax/hylafax-server_4.1.1-1.1_i386.deb
Intel IA-64:: http://security.debian.org/pool/updates/main/h/hylafax/hylafax-client_4.1.1-1.1_ia64.deb; http://security.debian.org/pool/updates/main/h/hylafax/hylafax-server_4.1.1-1.1_ia64.deb
HP Precision:: http://security.debian.org/pool/updates/main/h/hylafax/hylafax-client_4.1.1-1.1_hppa.deb; http://security.debian.org/pool/updates/main/h/hylafax/hylafax-server_4.1.1-1.1_hppa.deb
Motorola 680x0:: http://security.debian.org/pool/updates/main/h/hylafax/hylafax-client_4.1.1-1.1_m68k.deb; http://security.debian.org/pool/updates/main/h/hylafax/hylafax-server_4.1.1-1.1_m68k.deb
PowerPC:: http://security.debian.org/pool/updates/main/h/hylafax/hylafax-client_4.1.1-1.1_powerpc.deb; http://security.debian.org/pool/updates/main/h/hylafax/hylafax-server_4.1.1-1.1_powerpc.deb
IBM S/390:: http://security.debian.org/pool/updates/main/h/hylafax/hylafax-client_4.1.1-1.1_s390.deb; http://security.debian.org/pool/updates/main/h/hylafax/hylafax-server_4.1.1-1.1_s390.deb
Sun Sparc:: http://security.debian.org/pool/updates/main/h/hylafax/hylafax-client_4.1.1-1.1_sparc.deb; http://security.debian.org/pool/updates/main/h/hylafax/hylafax-server_4.1.1-1.1_sparc.deb

MD5 checksums of the listed files are available in the original advisory.