DSA-1721-1 libpam-krb5 -- several vulnerabilities

Debian Security Advisory

DSA-1721-1 libpam-krb5 -- several vulnerabilities

Date Reported:

11 Feb 2009

Affected Packages:

libpam-krb5

Vulnerable:

Yes

Security database references:

In Mitre's CVE dictionary: CVE-2009-0360, CVE-2009-0361.

More information:

Several local vulnerabilities have been discovered in the PAM module for MIT Kerberos. The Common Vulnerabilities and Exposures project identifies the following problems:

• CVE-2009-0360

  Russ Allbery discovered that the Kerberos PAM module parsed configuration settings from environment variables when run from a setuid context. This could lead to local privilege escalation if an attacker points a setuid program using PAM authentication to a Kerberos setup under her control.

• CVE-2009-0361

  Derek Chan discovered that the Kerberos PAM module allows reinitialisation of user credentials when run from a setuid context, resulting in potential local denial of service by overwriting the credential cache file or to privilege escalation.

For the stable distribution (etch), these problems have been fixed in version 2.6-1etch4.

For the upcoming stable distribution (lenny), these problems have been fixed in version 3.11-4.

For the unstable distribution (sid), these problems will be fixed soon.

We recommend that you upgrade your libpam-krb5 package.

Fixed in:

Debian GNU/Linux 4.0 (etch)

Source:

http://security.debian.org/pool/updates/main/libp/libpam-krb5/libpam-krb5_2.6-1etch4.dsc

http://security.debian.org/pool/updates/main/libp/libpam-krb5/libpam-krb5_2.6.orig.tar.gz

http://security.debian.org/pool/updates/main/libp/libpam-krb5/libpam-krb5_2.6-1etch4.diff.gz

Alpha:

http://security.debian.org/pool/updates/main/libp/libpam-krb5/libpam-krb5_2.6-1etch4_alpha.deb

AMD64:

http://security.debian.org/pool/updates/main/libp/libpam-krb5/libpam-krb5_2.6-1etch4_amd64.deb

ARM:

http://security.debian.org/pool/updates/main/libp/libpam-krb5/libpam-krb5_2.6-1etch4_arm.deb

HP Precision:

http://security.debian.org/pool/updates/main/libp/libpam-krb5/libpam-krb5_2.6-1etch4_hppa.deb

Intel IA-32:

http://security.debian.org/pool/updates/main/libp/libpam-krb5/libpam-krb5_2.6-1etch4_i386.deb

Intel IA-64:

http://security.debian.org/pool/updates/main/libp/libpam-krb5/libpam-krb5_2.6-1etch4_ia64.deb

Big-endian MIPS:

http://security.debian.org/pool/updates/main/libp/libpam-krb5/libpam-krb5_2.6-1etch4_mips.deb

Little-endian MIPS:

http://security.debian.org/pool/updates/main/libp/libpam-krb5/libpam-krb5_2.6-1etch4_mipsel.deb

PowerPC:

http://security.debian.org/pool/updates/main/libp/libpam-krb5/libpam-krb5_2.6-1etch4_powerpc.deb

IBM S/390:

http://security.debian.org/pool/updates/main/libp/libpam-krb5/libpam-krb5_2.6-1etch4_s390.deb

Sun Sparc:

http://security.debian.org/pool/updates/main/libp/libpam-krb5/libpam-krb5_2.6-1etch4_sparc.deb

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