Debian DSA-3466-1 : krb5 - security update

high Nessus Plugin ID 88581

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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.

Plugin Details

Severity: High

ID: 88581

File Name: debian_DSA-3466.nasl

Version: 2.9

Type: local

Agent: unix

Family: Debian Local Security Checks

Published: 2/5/2016

Updated: 1/11/2021

Supported Sensors: Agentless Assessment, Continuous Assessment, Frictionless Assessment Agent, Nessus Agent, Nessus

Risk Information

VPR

Risk Factor: Low

Score: 3.6

CVSS v2

Risk Factor: Medium

Base Score: 6.8

Temporal Score: 5

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

CVSS v3

Risk Factor: High

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

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

Exploit Ease: No known exploits are available

Patch Publication Date: 2/4/2016

Reference Information

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

DSA: 3466

Detections

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