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Red Hat Security Advisory

Synopsis:          Moderate: gssntlmssp security update
Advisory ID:       RHSA-2023:3097-01
Product:           Red Hat Enterprise Linux
Advisory URL:      https://access.redhat.com/errata/RHSA-2023:3097
Issue date:        2023-05-16
CVE Names:         CVE-2023-25563 CVE-2023-25564 CVE-2023-25565
                   CVE-2023-25566 CVE-2023-25567
====================================================================
1. Summary:

An update for gssntlmssp is now available for Red Hat Enterprise Linux 8.

Red Hat Product Security has rated this update as having a security impact
of Moderate. A Common Vulnerability Scoring System (CVSS) base score, which
gives a detailed severity rating, is available for each vulnerability from
the CVE link(s) in the References section.

2. Relevant releases/architectures:

Red Hat Enterprise Linux AppStream (v. 8) - aarch64, ppc64le, s390x, x86_64

3. Description:

The gssntlmssp is a GSSAPI NTLM mechanism that allows to perform NTLM
authentication in GSSAPI programs.

Security Fix(es):

* gssntlmssp: multiple out-of-bounds read when decoding NTLM fields
(CVE-2023-25563)

* gssntlmssp: memory corruption when decoding UTF16 strings
(CVE-2023-25564)

* gssntlmssp: incorrect free when decoding target information
(CVE-2023-25565)

* gssntlmssp: memory leak when parsing usernames (CVE-2023-25566)

* gssntlmssp: out-of-bounds read when decoding target information
(CVE-2023-25567)

For more details about the security issue(s), including the impact, a CVSS
score, acknowledgments, and other related information, refer to the CVE
page(s) listed in the References section.

4. Solution:

For details on how to apply this update, which includes the changes
described in this advisory, refer to:

https://access.redhat.com/articles/11258

5. Bugs fixed (https://bugzilla.redhat.com/):

2172019 - CVE-2023-25563 gssntlmssp: multiple out-of-bounds read when decoding NTLM fields
2172020 - CVE-2023-25564 gssntlmssp: memory corruption when decoding UTF16 strings
2172021 - CVE-2023-25565 gssntlmssp: incorrect free when decoding target information
2172022 - CVE-2023-25566 gssntlmssp: memory leak when parsing usernames
2172023 - CVE-2023-25567 gssntlmssp: out-of-bounds read when decoding target information

6. Package List:

Red Hat Enterprise Linux AppStream (v. 8):

Source:
gssntlmssp-1.2.0-1.el8_8.src.rpm

aarch64:
gssntlmssp-1.2.0-1.el8_8.aarch64.rpm
gssntlmssp-debuginfo-1.2.0-1.el8_8.aarch64.rpm
gssntlmssp-debugsource-1.2.0-1.el8_8.aarch64.rpm

ppc64le:
gssntlmssp-1.2.0-1.el8_8.ppc64le.rpm
gssntlmssp-debuginfo-1.2.0-1.el8_8.ppc64le.rpm
gssntlmssp-debugsource-1.2.0-1.el8_8.ppc64le.rpm

s390x:
gssntlmssp-1.2.0-1.el8_8.s390x.rpm
gssntlmssp-debuginfo-1.2.0-1.el8_8.s390x.rpm
gssntlmssp-debugsource-1.2.0-1.el8_8.s390x.rpm

x86_64:
gssntlmssp-1.2.0-1.el8_8.x86_64.rpm
gssntlmssp-debuginfo-1.2.0-1.el8_8.x86_64.rpm
gssntlmssp-debugsource-1.2.0-1.el8_8.x86_64.rpm

These packages are GPG signed by Red Hat for security.  Our key and
details on how to verify the signature are available from
https://access.redhat.com/security/team/key/

7. References:

https://access.redhat.com/security/cve/CVE-2023-25563
https://access.redhat.com/security/cve/CVE-2023-25564
https://access.redhat.com/security/cve/CVE-2023-25565
https://access.redhat.com/security/cve/CVE-2023-25566
https://access.redhat.com/security/cve/CVE-2023-25567
https://access.redhat.com/security/updates/classification/#moderate

8. Contact:

The Red Hat security contact is <secalert@redhat.com>. More contact
details at https://access.redhat.com/security/team/contact/

Copyright 2023 Red Hat, Inc.
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