FreeBSD : krb5 -- unkeyed PAC checksum handling vulnerability (9f971cea-03f5-11e0-bf50-001a926c7637)

low Nessus Plugin ID 51104

Language:

New! Plugin Severity Now Using CVSS v3

The calculated severity for Plugins has been updated to use CVSS v3 by default. Plugins that do not have a CVSS v3 score will fall back to CVSS v2 for calculating severity. Severity display preferences can be toggled in the settings dropdown.

Synopsis

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

Description

The MIT Kerberos team reports :

MIT krb5 incorrectly accepts an unkeyed checksum for PAC signatures.

An authenticated remote attacker can forge PACs if using a KDC that does not filter client-provided PAC data. This can result in privilege escalation against a service that relies on PAC contents to make authorization decisions.

Solution

Update the affected package.

See Also

http://web.mit.edu/kerberos/advisories/MITKRB5-SA-2010-007.txt

http://www.nessus.org/u?86f32866

Plugin Details

Severity: Low

ID: 51104

File Name: freebsd_pkg_9f971cea03f511e0bf50001a926c7637.nasl

Version: 1.17

Type: local

Published: 12/10/2010

Updated: 1/6/2021

Dependencies: ssh_get_info.nasl

Risk Information

VPR

Risk Factor: Low

Score: 1.4

CVSS v2

Risk Factor: Medium

Base Score: 4.3

Temporal Score: 3.2

Vector: AV:N/AC:M/Au:N/C:N/I:P/A:N

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

CVSS v3

Risk Factor: Low

Base Score: 3.7

Temporal Score: 3.2

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

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

Vulnerability Information

CPE: p-cpe:/a:freebsd:freebsd:krb5, cpe:/o:freebsd:freebsd

Required KB Items: Host/local_checks_enabled, Host/FreeBSD/release, Host/FreeBSD/pkg_info

Exploit Ease: No known exploits are available

Patch Publication Date: 12/9/2010

Vulnerability Publication Date: 11/30/2010

Reference Information

CVE: CVE-2010-1324

BID: 45116