#VU76197 Out-of-bounds read in Gss-ntlmssp - CVE-2023-25567

Vulnerability identifier: #VU76197

Vulnerability risk: Medium

CVSSv4.0: 6.6 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2023-25567

CWE-ID: CWE-125

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Gss-ntlmssp

Vendor: modauthgssapi

Description

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to a boundary condition when decoding target information. A remote attacker can send specially crafted NTLM request to the application, trigger an out-of-bounds read error and perform a denial of service (DoS) attack.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Gss-ntlmssp: 0.1.0 - 1.1.0

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External links
https://github.com/gssapi/gss-ntlmssp/security/advisories/GHSA-24pf-6prf-24ch
https://github.com/gssapi/gss-ntlmssp/releases/tag/v1.2.0
https://github.com/gssapi/gss-ntlmssp/commit/025fbb756d44ffee8f847db4222ed6aa4bd1fbe4

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Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.