Debian DSA-3466-1 : krb5 - security update

Medium Nessus Plugin ID 88581

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VPR Score: 3.6

Synopsis

The remote Debian host is missing a security-related update.

Description

Several vulnerabilities were discovered in krb5, the MIT implementation of Kerberos. The Common Vulnerabilities and Exposures project identifies the following problems :

- CVE-2015-8629 It was discovered that an authenticated attacker can cause kadmind to read beyond the end of allocated memory by sending a string without a terminating zero byte.
Information leakage may be possible for an attacker with permission to modify the database.

- CVE-2015-8630 It was discovered that an authenticated attacker with permission to modify a principal entry can cause kadmind to dereference a null pointer by supplying a null policy value but including KADM5_POLICY in the mask.

- CVE-2015-8631 It was discovered that an authenticated attacker can cause kadmind to leak memory by supplying a null principal name in a request which uses one. Repeating these requests will eventually cause kadmind to exhaust all available memory.

Solution

Upgrade the krb5 packages.

For the oldstable distribution (wheezy), these problems have been fixed in version 1.10.1+dfsg-5+deb7u7. The oldstable distribution (wheezy) is not affected by CVE-2015-8630.

For the stable distribution (jessie), these problems have been fixed in version 1.12.1+dfsg-19+deb8u2.

See Also

https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=813126

https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=813127

https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=813296

https://security-tracker.debian.org/tracker/CVE-2015-8629

https://security-tracker.debian.org/tracker/CVE-2015-8630

https://security-tracker.debian.org/tracker/CVE-2015-8631

https://security-tracker.debian.org/tracker/CVE-2015-8630

https://packages.debian.org/source/wheezy/krb5

https://packages.debian.org/source/jessie/krb5

https://www.debian.org/security/2016/dsa-3466

Plugin Details

Severity: Medium

ID: 88581

File Name: debian_DSA-3466.nasl

Version: 2.8

Type: local

Agent: unix

Published: 2016/02/05

Updated: 2020/09/23

Dependencies: 12634

Risk Information

Risk Factor: Medium

VPR Score: 3.6

CVSS v2.0

Base Score: 6.8

Temporal Score: 5

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

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

CVSS v3.0

Base Score: 7.5

Temporal Score: 6.5

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C

Vulnerability Information

CPE: p-cpe:/a:debian:debian_linux:krb5, cpe:/o:debian:debian_linux:7.0, cpe:/o:debian:debian_linux:8.0

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

Exploit Available: false

Exploit Ease: No known exploits are available

Patch Publication Date: 2016/02/04

Reference Information

CVE: CVE-2015-8629, CVE-2015-8630, CVE-2015-8631

DSA: 3466