Bug 2172022 (CVE-2023-25566)

Summary: CVE-2023-25566 gssntlmssp: memory leak when parsing usernames
Product: [Other] Security Response Reporter: TEJ RATHI <trathi>
Component: vulnerabilityAssignee: Red Hat Product Security <security-response-team>
Status: CLOSED ERRATA QA Contact:
Severity: medium Docs Contact:
Priority: medium    
Version: unspecifiedCC: jrische
Target Milestone: ---Keywords: Security
Target Release: ---   
Hardware: All   
OS: Linux   
Whiteboard:
Fixed In Version: gssntlmssp 1.2.0 Doc Type: If docs needed, set a value
Doc Text:
A flaw was found in GSS-NTLMSSP, a mechglue plugin for the GSSAPI library that implements NTLM authentication. A memory leak can be triggered when parsing usernames, triggering a denial of service. The domain portion of a username may be overridden, causing an allocated memory area the size of the domain name to be leaked. This flaw allows an attacker to leak memory via the main `gss_accept_sec_context` entry point, potentially causing a denial of service.
Story Points: ---
Clone Of: Environment:
Last Closed: 2023-05-17 03:43:06 UTC Type: ---
Regression: --- Mount Type: ---
Documentation: --- CRM:
Verified Versions: Category: ---
oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
Embargoed:
Bug Depends On: 2172027, 2175085, 2178907, 2181313    
Bug Blocks: 2169915    

Description TEJ RATHI 2023-02-21 08:50:31 UTC
GSS-NTLMSSP is a mechglue plugin for the GSSAPI library that implements NTLM authentication. Prior to version 1.2.0, a memory leak can be triggered when parsing usernames which can trigger a denial-of-service. The domain portion of a username may be overridden causing an allocated memory area the size of the domain name to be leaked. An attacker can leak memory via the main `gss_accept_sec_context` entry point, potentially causing a denial-of-service. This issue is fixed in version 1.2.0.

https://github.com/gssapi/gss-ntlmssp/security/advisories/GHSA-mfm4-6g58-jw74
https://github.com/gssapi/gss-ntlmssp/releases/tag/v1.2.0
https://github.com/gssapi/gss-ntlmssp/commit/8660fb16474054e692a596e9c79670cd4d3954f4

Comment 1 TEJ RATHI 2023-02-21 08:50:54 UTC
Created gssntlmssp tracking bugs for this issue:

Affects: epel-7 [bug 2172027]

Comment 2 Sandipan Roy 2023-03-03 07:51:48 UTC
Created gssntlmssp tracking bugs for this issue:

Affects: fedora-all [bug 2175085]

Comment 4 errata-xmlrpc 2023-05-16 10:01:02 UTC
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8

Via RHSA-2023:3097 https://access.redhat.com/errata/RHSA-2023:3097

Comment 5 Product Security DevOps Team 2023-05-17 03:43:04 UTC
This bug is now closed. Further updates for individual products will be reflected on the CVE page(s):

https://access.redhat.com/security/cve/cve-2023-25566