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A gssntlmssp security update has been released for Red Hat Enterprise Linux 15 SP4.

openSUSE-SU-2023:0048-1: moderate: Security update for gssntlmssp

openSUSE Security Update: Security update for gssntlmssp

Announcement ID: openSUSE-SU-2023:0048-1
Rating: moderate
References: #1208278 #1208279 #1208280 #1208281 #1208282

Cross-References: CVE-2023-25563 CVE-2023-25564 CVE-2023-25565
CVE-2023-25566 CVE-2023-25567
CVSS scores:
CVE-2023-25563 (NVD) : 5.9 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
CVE-2023-25564 (NVD) : 6.5 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:H
CVE-2023-25565 (NVD) : 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CVE-2023-25566 (NVD) : 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CVE-2023-25567 (NVD) : 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Affected Products:
openSUSE Backports SLE-15-SP4

An update that fixes 5 vulnerabilities is now available.


This update for gssntlmssp fixes the following issues:

Update to version 1.2.0

* Implement gss_set_cred_option.
* Allow to gss_wrap even if NEGOTIATE_SEAL is not negotiated.
* Move HMAC code to OpenSSL EVP API.
* Fix crash bug when acceptor credentials are NULL.
* Translations update from Fedora Weblate.

Fix security issues:

* CVE-2023-25563 (boo#1208278): multiple out-of-bounds read when decoding
NTLM fields.
* CVE-2023-25564 (boo#1208279): memory corruption when decoding UTF16
* CVE-2023-25565 (boo#1208280): incorrect free when decoding target
* CVE-2023-25566 (boo#1208281): memory leak when parsing usernames.
* CVE-2023-25567 (boo#1208282): out-of-bounds read when decoding target

Update to version 1.1

* various build fixes and better compatibility when a MIC is requested.

Update to version 1.0

* Fix test_gssapi_rfc5587.
* Actually run tests with make check.
* Add two tests around NTLMSSP_NEGOTIATE_LMKEY.
* Refine LM compatibility level logic.
* Refactor the gssntlm_required_security function.
* Implement reading LM/NT hashes.
* Add test for smpasswd-like user files.
* Return confidentiality status.
* Fix segfault in sign/seal functions.
* Fix dummy signature generation.
* Use UCS16LE instead of UCS-2LE.
* Provide a zero lm key if the password is too long.
* Completely omit CBs AV pairs when no CB provided.
* Change license to the more permissive ISC.
* Do not require cached users with winbind.
* Add ability to pass keyfile via cred store.
* Remove unused parts of
* Move attribute names to allocated strings.
* Adjust serialization for name attributes.
* Fix crash in acquiring credentials.
* Fix fallback to external_creds interface.
* Introduce parse_user_name() function.
* Add test for parse_user_name.
* Change how we assemble user names in ASC.
* Use thread local storage for winbind context.
* Make per thread winbind context optional.
* Fixed memleak of usr_cred.
* Support get_sids request via name attributes.
* Fixed memory leaks found by valgrind.
- Update to version 0.9
* add support for getting session key.
* Add gss_inquire_attrs_for_mech().
* Return actual data for RFC5587 API.
* Add new Windows version flags.
* Add Key exchange also when wanting integrity only.
* Drop support for GSS_C_MA_NOT_DFLT_MECH.

Patch Instructions:

To install this openSUSE Security Update use the SUSE recommended installation methods
like YaST online_update or "zypper patch".

Alternatively you can run the command listed for your product:

- openSUSE Backports SLE-15-SP4:

zypper in -t patch openSUSE-2023-48=1

Package List:

- openSUSE Backports SLE-15-SP4 (aarch64 i586 ppc64le s390x x86_64):