Debian DSA-1766-1 : krb5 - several vulnerabilities
critical Nessus Plugin ID 36120
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Synopsis
The remote Debian host is missing a security-related update.Description
Several vulnerabilities have been found in the MIT reference implementation of Kerberos V5, a system for authenticating users and services on a network. The Common Vulnerabilities and Exposures project identified the following problems :- CVE-2009-0844 The Apple Product Security team discovered that the SPNEGO GSS-API mechanism suffers of a missing bounds check when reading a network input buffer which results in an invalid read crashing the application or possibly leaking information.
- CVE-2009-0845 Under certain conditions the SPNEGO GSS-API mechanism references a NULL pointer which crashes the application using the library.
- CVE-2009-0847 An incorrect length check inside the ASN.1 decoder of the MIT krb5 implementation allows an unauthenticated remote attacker to crash of the kinit or KDC program.
- CVE-2009-0846 Under certain conditions the the ASN.1 decoder of the MIT krb5 implementation frees an uninitialized pointer which could lead to denial of service and possibly arbitrary code execution.
Solution
Upgrade the krb5 packages.For the oldstable distribution (etch), this problem has been fixed in version 1.4.4-7etch7.
For the stable distribution (lenny), this problem has been fixed in version 1.6.dfsg.4~beta1-5lenny1.
See Also
https://security-tracker.debian.org/tracker/CVE-2009-0844
https://security-tracker.debian.org/tracker/CVE-2009-0845
https://security-tracker.debian.org/tracker/CVE-2009-0847
Plugin Details
Severity: Critical
ID: 36120
File Name: debian_DSA-1766.nasl
Version: 1.16
Type: local
Agent: unix
Family: Debian Local Security Checks
Published: 4/9/2009
Updated: 1/4/2021
Dependencies: ssh_get_info.nasl
Risk Information
VPR
Risk Factor: Medium
Score: 5.9
CVSS v2
Risk Factor: Critical
Base Score: 10
Temporal Score: 8.7
Vector: AV:N/AC:L/Au:N/C:C/I:C/A:C
Temporal Vector: E:ND/RL:OF/RC:C
Vulnerability Information
CPE: p-cpe:/a:debian:debian_linux:krb5, cpe:/o:debian:debian_linux:4.0, cpe:/o:debian:debian_linux:5.0
Required KB Items: Host/local_checks_enabled, Host/Debian/release, Host/Debian/dpkg-l
Exploit Ease: No known exploits are available
Patch Publication Date: 4/9/2009
Reference Information
CVE: CVE-2009-0844, CVE-2009-0845, CVE-2009-0846, CVE-2009-0847