RHSA-2023:3097 - Security Advisory

Topic

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.

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.

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

Affected Products

• Red Hat Enterprise Linux for x86_64 8 x86_64
• Red Hat Enterprise Linux for x86_64 - Extended Update Support 8.8 x86_64
• Red Hat Enterprise Linux for IBM z Systems 8 s390x
• Red Hat Enterprise Linux for IBM z Systems - Extended Update Support 8.8 s390x
• Red Hat Enterprise Linux for Power, little endian 8 ppc64le
• Red Hat Enterprise Linux for Power, little endian - Extended Update Support 8.8 ppc64le
• Red Hat Enterprise Linux Server - TUS 8.8 x86_64
• Red Hat Enterprise Linux for ARM 64 8 aarch64
• Red Hat Enterprise Linux for ARM 64 - Extended Update Support 8.8 aarch64
• Red Hat Enterprise Linux Server for Power LE - Update Services for SAP Solutions 8.8 ppc64le
• Red Hat Enterprise Linux for x86_64 - Update Services for SAP Solutions 8.8 x86_64

Fixes

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

CVEs

• CVE-2023-25563
• CVE-2023-25564
• CVE-2023-25565
• CVE-2023-25566
• CVE-2023-25567

References

• https://access.redhat.com/security/updates/classification/#moderate