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redhatcveRedhat.comRH:CVE-2023-25566
HistoryFeb 21, 2023 - 8:59 a.m.

CVE-2023-25566

2023-02-2108:59:28
redhat.com
access.redhat.com
5
cve-2023-25566
gss-ntlmssp
mechglue plugin
gssapi library
ntlm authentication
memory leak
denial of service
usernames
domain portion
allocated memory

CVSS3

7.5

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

HIGH

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

EPSS

0.001

Percentile

45.0%

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.

CVSS3

7.5

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

HIGH

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

EPSS

0.001

Percentile

45.0%