FreeBSD : krb5 -- multiple checksum handling vulnerabilities (0d57c1d9-03f4-11e0-bf50-001a926c7637)

low Nessus Plugin ID 51100

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Synopsis

The remote FreeBSD host is missing one or more security-related updates.

Description

The MIT Kerberos team reports :

MIT krb incorrectly accepts an unkeyed checksum with DES session keys for version 2 (RFC 4121) of the GSS-API krb5 mechanism.

An unauthenticated remote attacker can forge GSS tokens that are intended to be integrity-protected but unencrypted, if the targeted pre-existing application session uses a DES session key.

MIT krb5 KDC incorrectly accepts RFC 3961 key-derivation checksums using RC4 keys when verifying the req-checksum in a KrbFastArmoredReq.

An unauthenticated remote attacker has a 1/256 chance of swapping a client-issued KrbFastReq into a different KDC-REQ, if the armor key is RC4. The consequences are believed to be minor.

Solution

Update the affected packages.

See Also

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

http://www.nessus.org/u?1b20ec3d

Plugin Details

Severity: Low

ID: 51100

File Name: freebsd_pkg_0d57c1d903f411e0bf50001a926c7637.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