#VU68303 NULL pointer dereference in heimdal - CVE-2022-3116

Vulnerability identifier: #VU68303

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-2022-3116

CWE-ID: CWE-476

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
heimdal
Server applications / Encryption software

Vendor: Heimdal Software

Description

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

The vulnerability exists due to a NULL pointer dereference error in lib/gssapi/spnego/accept_sec_context.c. A remote attacker can pass specially crafted data to the application and perform a denial of service (DoS) attack.

Mitigation
Cybersecurity Help is currently unaware of any official solution to address this vulnerability.

Vulnerable software versions

heimdal: 7.0.1 - 7.7.0

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External links
https://kb.cert.org/vuls/id/730793
https://github.com/heimdal/heimdal/commit/7a19658c1f4fc4adf85bb7bea96caae5ba57b33e

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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.