SUSE: krb5 Moderate Spoofing Threat Advisory CVE-2025-3576
suse
October 21, 2025
* bsc#1241219 Cross-References: * CVE-2025-3576
Summary
## This update for krb5 fixes the following issues: * 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. ## Patch Instructions: To install this SUSE update use the SUSE recommended installation methods like YaST online_update or "zypper patch".
References
* bsc#1241219
Cross-
* CVE-2025-3576
CVSS scores:
* CVE-2025-3576 ( SUSE ): 8.2
CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N
* CVE-2025-3576 ( SUSE ): 5.9 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N
* CVE-2025-3576 ( NVD ): 5.9 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N
Affected Products:
* Basesystem Module 15-SP6
* Basesystem Module 15-SP7
* openSUSE Leap 15.6
* Server Applications Module 15-SP6
* Server Applications Module 15-SP7
* SUSE Linux Enterprise Desktop 15 SP6
* SUSE Linux Enterprise Desktop 15 SP7
* SUSE Linux Enterprise Real Time 15 SP6
* SUSE Linux Enterprise Real Time 15 SP7
* SUSE Linux Enterprise Server 15 SP6
* SUSE Linux Enterprise Server 15 SP7
* SUSE Linux Enterprise Server for SAP Applications 15 SP6
* SUSE Linux Enterprise Server for SAP Applications 15 SP7
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