Ubuntu 6.06 LTS / 7.10 / 8.04 LTS / 8.10 : krb5 vulnerabilities (USN-755-1)

Critical Nessus Plugin ID 37819


The remote Ubuntu host is missing one or more security-related patches.


Multiple flaws were discovered in the Kerberos GSS-API and ASN.1 routines that did not correctly handle certain requests. An unauthenticated remote attacker could send specially crafted traffic to crash services using the Kerberos library, leading to a denial of service.

Note that Tenable Network Security has extracted the preceding description block directly from the Ubuntu security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.


Update the affected packages.

Plugin Details

Severity: Critical

ID: 37819

File Name: ubuntu_USN-755-1.nasl

Version: $Revision: 1.11 $

Type: local

Agent: unix

Published: 2009/04/23

Modified: 2016/12/01

Dependencies: 12634

Risk Information

Risk Factor: Critical


Base Score: 10

Temporal Score: 8.7

Vector: CVSS2#AV:N/AC:L/Au:N/C:C/I:C/A:C

Temporal Vector: CVSS2#E:ND/RL:OF/RC:C

Vulnerability Information

CPE: p-cpe:/a:canonical:ubuntu_linux:krb5-admin-server, p-cpe:/a:canonical:ubuntu_linux:krb5-clients, p-cpe:/a:canonical:ubuntu_linux:krb5-doc, p-cpe:/a:canonical:ubuntu_linux:krb5-ftpd, p-cpe:/a:canonical:ubuntu_linux:krb5-kdc, p-cpe:/a:canonical:ubuntu_linux:krb5-kdc-ldap, p-cpe:/a:canonical:ubuntu_linux:krb5-pkinit, p-cpe:/a:canonical:ubuntu_linux:krb5-rsh-server, p-cpe:/a:canonical:ubuntu_linux:krb5-telnetd, p-cpe:/a:canonical:ubuntu_linux:krb5-user, p-cpe:/a:canonical:ubuntu_linux:libkadm55, p-cpe:/a:canonical:ubuntu_linux:libkrb5-dbg, p-cpe:/a:canonical:ubuntu_linux:libkrb5-dev, p-cpe:/a:canonical:ubuntu_linux:libkrb53, cpe:/o:canonical:ubuntu_linux:6.06:-:lts, cpe:/o:canonical:ubuntu_linux:7.10, cpe:/o:canonical:ubuntu_linux:8.04:-:lts, cpe:/o:canonical:ubuntu_linux:8.10

Required KB Items: Host/cpu, Host/Ubuntu, Host/Ubuntu/release, Host/Debian/dpkg-l

Exploit Available: false

Exploit Ease: No known exploits are available

Patch Publication Date: 2009/04/07

Reference Information

CVE: CVE-2009-0844, CVE-2009-0845, CVE-2009-0846, CVE-2009-0847

BID: 34257, 34408, 34409

USN: 755-1

CWE: 20, 119, 189