INFORMATION BULLETIN

S-370: Afuse Vulnerability

[Debian Security Advisory DSA-1611-1]

August 20, 2008 16:00 GMT


PROBLEM:	It was discovered that afuse, an automounting file system in user-space, did not properly escape meta characters in paths. This allowed a local attacker with read access to the file system to execute commands as the owner of the file system.
PLATFORM:	Debian GNU/Linux 4.0 (etch)
DAMAGE:	Privilege escalation.
SOLUTION:	Upgrade to the appropriate version.

VULNERABILITY ASSESSMENT:	The risk is LOW. This allows a local attacker with read access to the file system to execute commands as the owner of the file system.

CVSS 2 BASE SCORE: TEMPORAL SCORE: VECTOR:	4.3 3.6 (AV:L/AC:L/Au:S/C:P/I:P/A:P/E:F/RL:OF/RC:C)

LINKS:
CIAC BULLETIN:	http://www.ciac.org/ciac/bulletins/s-370.shtml
ORIGINAL BULLETIN:	http://www.debian.org/security/2008/dsa-1611
CVE:	CVE-2008-2232

[***** Start Debian Security Advisory DSA-1611-1 *****]

Debian Security Advisory

DSA-1611-1 afuse -- privilege escalation

Date Reported:

16 Jul 2008

Affected Packages:

afuse

Vulnerable:

Yes

Security database references:

In the Debian bugtracking system: Bug 490921.
In Mitre's CVE dictionary: CVE-2008-2232.

More information:

Anders Kaseorg discovered that afuse, an automounting file system in user-space, did not properly escape meta characters in paths. This allowed a local attacker with read access to the filesystem to execute commands as the owner of the filesystem.

For the stable distribution (etch), this problem has been fixed in version 0.1.1-1+etch1.

For the unstable distribution (sid), this problem has been fixed in version 0.2-3.

We recommend that you upgrade your afuse (0.1.1-1+etch1) package.

Fixed in:

Debian GNU/Linux 4.0 (etch)

Source:: http://security.debian.org/pool/updates/main/a/afuse/afuse_0.1.1-1+etch1.diff.gz; http://security.debian.org/pool/updates/main/a/afuse/afuse_0.1.1-1+etch1.dsc; http://security.debian.org/pool/updates/main/a/afuse/afuse_0.1.1.orig.tar.gz
Alpha:: http://security.debian.org/pool/updates/main/a/afuse/afuse_0.1.1-1+etch1_alpha.deb
AMD64:: http://security.debian.org/pool/updates/main/a/afuse/afuse_0.1.1-1+etch1_amd64.deb
ARM:: http://security.debian.org/pool/updates/main/a/afuse/afuse_0.1.1-1+etch1_arm.deb
HP Precision:: http://security.debian.org/pool/updates/main/a/afuse/afuse_0.1.1-1+etch1_hppa.deb
Intel IA-32:: http://security.debian.org/pool/updates/main/a/afuse/afuse_0.1.1-1+etch1_i386.deb
Intel IA-64:: http://security.debian.org/pool/updates/main/a/afuse/afuse_0.1.1-1+etch1_ia64.deb
Big-endian MIPS:: http://security.debian.org/pool/updates/main/a/afuse/afuse_0.1.1-1+etch1_mips.deb
Little-endian MIPS:: http://security.debian.org/pool/updates/main/a/afuse/afuse_0.1.1-1+etch1_mipsel.deb
PowerPC:: http://security.debian.org/pool/updates/main/a/afuse/afuse_0.1.1-1+etch1_powerpc.deb
IBM S/390:: http://security.debian.org/pool/updates/main/a/afuse/afuse_0.1.1-1+etch1_s390.deb
Sun Sparc:: http://security.debian.org/pool/updates/main/a/afuse/afuse_0.1.1-1+etch1_sparc.deb

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


[***** End Debian Security Advisory DSA-1611-1 *****]

CIAC wishes to acknowledge the contributions of Debian for the information contained in this bulletin.

CIAC services are available to DOE, DOE Contractors, and the NIH. CIAC can be contacted at:

    Voice:          +1 925-422-8193 (7 x 24)
    FAX:            +1 925-423-8002
    STU-III:        +1 925-423-2604
    E-mail:          ciac@ciac.org
    World Wide Web:  http://www.ciac.org/
    Anonymous FTP:   ftp.ciac.org

This document was prepared as an account of work sponsored by an agency of the United States Government. Neither the United States Government nor the University of California nor any of their employees, makes any warranty, express or implied, or assumes any legal liability or responsibility for the accuracy, completeness, or usefulness of any information, apparatus, product, or process disclosed, or represents that its use would not infringe privately owned rights. Reference herein to any specific commercial products, process, or service by trade name, trademark, manufacturer, or otherwise, does not necessarily constitute or imply its endorsement, recommendation or favoring by the United States Government or the University of California. The views and opinions of authors expressed herein do not necessarily state or reflect those of the United States Government or the University of California, and shall not be used for advertising or product endorsement purposes.

UCRL-MI-119788
[Privacy and Legal Notice]