NULL pointer dereference in heimdal - CVE-2022-3116

Vulnerability identifier: #VU68303

CSH Severity: Medium

CVSS v4: 8.7 [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]

CVE-ID: CVE-2022-3116

CWE-ID: CWE-476

Exploitation vector: Remote access

Exploit availability: No public exploit available

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.

heimdal
cflinuxfs3
Ubuntu
libgssapi3-heimdal (Ubuntu package)
heimdal-clients-x (Ubuntu package)
heimdal-servers-x (Ubuntu package)
heimdal-kcm (Ubuntu package)
heimdal-clients (Ubuntu package)
heimdal-kdc (Ubuntu package)
libkrb5-26-heimdal (Ubuntu package)
libkdc2-heimdal (Ubuntu package)
heimdal-servers (Ubuntu package)

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

cflinuxfs3 - update to 0.328.0
libgssapi3-heimdal (Ubuntu package) - addressed in versions Ubuntu Pro (Infra-only), 7.5.0+dfsg-1ubuntu0.1, 7.7.0+dfsg-1ubuntu1.1
heimdal-clients-x (Ubuntu package) - update to Ubuntu Pro (Infra-only)
heimdal-servers-x (Ubuntu package) - update to Ubuntu Pro (Infra-only)
heimdal-kcm (Ubuntu package) - addressed in versions Ubuntu Pro (Infra-only), 7.5.0+dfsg-1ubuntu0.1, 7.7.0+dfsg-1ubuntu1.1
heimdal-clients (Ubuntu package) - addressed in versions Ubuntu Pro (Infra-only), 7.5.0+dfsg-1ubuntu0.1, 7.7.0+dfsg-1ubuntu1.1
heimdal-kdc (Ubuntu package) - addressed in versions Ubuntu Pro (Infra-only), 7.5.0+dfsg-1ubuntu0.1, 7.7.0+dfsg-1ubuntu1.1
libkrb5-26-heimdal (Ubuntu package) - addressed in versions Ubuntu Pro (Infra-only), 7.5.0+dfsg-1ubuntu0.1, 7.7.0+dfsg-1ubuntu1.1
libkdc2-heimdal (Ubuntu package) - addressed in versions Ubuntu Pro (Infra-only), 7.5.0+dfsg-1ubuntu0.1, 7.7.0+dfsg-1ubuntu1.1
heimdal-servers (Ubuntu package) - addressed in versions Ubuntu Pro (Infra-only), 7.5.0+dfsg-1ubuntu0.1, 7.7.0+dfsg-1ubuntu1.1

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

• Denial of service in Heimdal
• Ubuntu update for heimdal
• Multiple vulnerabilities in cflinuxfs3