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FreeBSD : krb5 -- MIT krb5 Security Advisory 2026-001 (8dc02503-dd51-11f1-a654-f8b46a88f42c)

high Nessus Plugin ID 378786

Synopsis

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

Description

The version of FreeBSD installed on the remote host is prior to tested version. It is, therefore, affected by multiple vulnerabilities as referenced in the 8dc02503-dd51-11f1-a654-f8b46a88f42c advisory.

 The MIT KRB5 Project reports:
 An authenticated attacker can bypass authentication indicator enforcement by requesting a service ticket with fake CAMMAC authorization data. Updating to the 1.22.3 release on the KDC is sufficient to prevent this attack.
 An authenticated attacker can bypass an application server's PAC authorization data checks by requesting a service ticket with a fake PAC. Updating to the 1.22.3 release on either the KDC or the affected application server will prevent this attack.
 An authenticated attacker with administrative privileges can bypass the lockdown_keys attribute by using the password change protocol instead of the kadmin protocol to modify a principal's keys.
 The KDC, kadmind, and GSS-API application servers are all vulnerable to denial of service attacks by unauthenticated attackers.

Tenable has extracted the preceding description block directly from the FreeBSD security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

Solution

Update the affected packages.

See Also

https://web.mit.edu/kerberos/advisories/MITKRB5-SA-2026-001.txt

http://www.nessus.org/u?c09dcb68

Plugin Details

Severity: High

ID: 378786

File Name: freebsd_pkg_8dc02503dd5111f1a654f8b46a88f42c.nasl

Version: 1.1

Type: Local

Published: 11/11/2026

Updated: 11/11/2026

Supported Sensors: Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 5

Percentile: 92.8

CVSS v2

Risk Factor: High

Base Score: 7.8

Temporal Score: 6.1

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

CVSS Score Source: CVE-2026-40356

CVSS v3

Risk Factor: High

Base Score: 7.5

Temporal Score: 6.7

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:P/RL:O/RC:C

CVSS v4

Risk Factor: High

Base Score: 7.1

Threat Score: 5.7

Threat Vector: CVSS:4.0/E:P

Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N

CVSS Score Source: CVE-2026-107778

Vulnerability Information

CPE: cpe:/o:freebsd:freebsd, p-cpe:/a:freebsd:freebsd:krb5-122, p-cpe:/a:freebsd:freebsd:krb5-devel, p-cpe:/a:freebsd:freebsd:krb5

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

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 11/10/2026

Vulnerability Publication Date: 4/28/2026

Reference Information

CVE: CVE-2026-107364, CVE-2026-107708, CVE-2026-107778, CVE-2026-107884, CVE-2026-111423, CVE-2026-112314, CVE-2026-112315, CVE-2026-112316, CVE-2026-112317, CVE-2026-112318, CVE-2026-112319, CVE-2026-112320, CVE-2026-112321, CVE-2026-112322, CVE-2026-112323, CVE-2026-119079, CVE-2026-40355, CVE-2026-40356, CVE-2026-71199, CVE-2026-71200