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SUSE SLED15 / SLES15 / openSUSE 15 Security Update : krb5 (SUSE-SU-2025:3699-1)

medium Nessus Plugin ID 271173

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Synopsis

The remote SUSE host is missing a security update.

Description

The remote SUSE Linux SLED15 / SLED_SAP15 / SLES15 / SLES_SAP15 / openSUSE 15 host has packages installed that are affected by a vulnerability as referenced in the SUSE-SU-2025:3699-1 advisory.

 - CVE-2025-3576: weakness in the MD5 checksum design allows for spoofing of GSSAPI-protected messages that are using RC4-HMAC-MD5 (bsc#1241219).

 Krb5 as very old protocol supported quite a number of ciphers that are not longer up to current cryptographic standards.

 To avoid problems with those, SUSE has by default now disabled those alorithms.

 The following algorithms have been removed from valid krb5 enctypes:

 - des3-cbc-sha1
 - arcfour-hmac-md5

 To reenable those algorithms, you can use allow options in krb5.conf:

 [libdefaults] allow_des3 = true allow_rc4 = true

 to reenable them.

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

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

Solution

Update the affected packages.

See Also

https://bugzilla.suse.com/1241219

https://lists.suse.com/pipermail/sle-updates/2025-October/042240.html

https://www.suse.com/security/cve/CVE-2025-3576

Plugin Details

Severity: Medium

ID: 271173

File Name: suse_SU-2025-3699-1.nasl

Version: 1.1

Type: local

Agent: unix

Published: 10/22/2025

Updated: 10/22/2025

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

Risk Information

VPR

Risk Factor: Medium

Score: 4.4

CVSS v2

Risk Factor: Medium

Base Score: 5.4

Temporal Score: 4

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

CVSS Score Source: CVE-2025-3576

CVSS v3

Risk Factor: Medium

Base Score: 5.9

Temporal Score: 5.2

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

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

Vulnerability Information

CPE: p-cpe:/a:novell:suse_linux:krb5, p-cpe:/a:novell:suse_linux:krb5-client, p-cpe:/a:novell:suse_linux:krb5-plugin-kdb-ldap, cpe:/o:novell:suse_linux:15, p-cpe:/a:novell:suse_linux:krb5-plugin-preauth-otp, p-cpe:/a:novell:suse_linux:krb5-plugin-preauth-pkinit, p-cpe:/a:novell:suse_linux:krb5-server, p-cpe:/a:novell:suse_linux:krb5-devel, p-cpe:/a:novell:suse_linux:krb5-32bit

Required KB Items: Host/local_checks_enabled, Host/cpu, Host/SuSE/release, Host/SuSE/rpm-list

Exploit Ease: No known exploits are available

Patch Publication Date: 10/21/2025

Vulnerability Publication Date: 4/15/2025

Reference Information

CVE: CVE-2025-3576

SuSE: SUSE-SU-2025:3699-1