NULL pointer dereference in heimdal - CVE-2021-44758
Published: November 16, 2022
Vulnerability identifier: #VU69365
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-2021-44758
CWE-ID: CWE-476
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
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 SPNEGO acceptors. A remote attacker can pass specially crafted data to the application and perform a denial of service (DoS) attack.
Affected software
heimdal
Debian Linux
Fedora
FreeBSD
Ubuntu
libgssapi3-heimdal (Ubuntu package)
libhdb9-heimdal (Ubuntu package)
libasn1-8-heimdal (Ubuntu package)
libkrb5-26-heimdal (Ubuntu package)
libhx509-5-heimdal (Ubuntu package)
heimdal (Debian package)
heimdal
cflinuxfs3
Platform Automation Toolkit
Debian Linux
Fedora
FreeBSD
Ubuntu
libgssapi3-heimdal (Ubuntu package)
libhdb9-heimdal (Ubuntu package)
libasn1-8-heimdal (Ubuntu package)
libkrb5-26-heimdal (Ubuntu package)
libhx509-5-heimdal (Ubuntu package)
heimdal (Debian package)
heimdal
cflinuxfs3
Platform Automation Toolkit
How to mitigate CVE-2021-44758
Install updates from vendor's website.
heimdal - update to 7.7.1
libgssapi3-heimdal (Ubuntu package) - addressed in versions Ubuntu Pro (Infra-only), 7.5.0+dfsg-1ubuntu0.3, 7.7.0+dfsg-1ubuntu1.3
libhdb9-heimdal (Ubuntu package) - addressed in versions Ubuntu Pro (Infra-only), 7.5.0+dfsg-1ubuntu0.3, 7.7.0+dfsg-1ubuntu1.3
libasn1-8-heimdal (Ubuntu package) - addressed in versions Ubuntu Pro (Infra-only), 7.5.0+dfsg-1ubuntu0.3, 7.7.0+dfsg-1ubuntu1.3
libkrb5-26-heimdal (Ubuntu package) - addressed in versions Ubuntu Pro (Infra-only), 7.5.0+dfsg-1ubuntu0.3, 7.7.0+dfsg-1ubuntu1.3
libhx509-5-heimdal (Ubuntu package) - addressed in versions Ubuntu Pro (Infra-only), 7.5.0+dfsg-1ubuntu0.3, 7.7.0+dfsg-1ubuntu1.3
cflinuxfs3 - update to 0.349.0
Platform Automation Toolkit - addressed in versions 4.4.31, 5.0.24, 5.1.0
heimdal (Debian package) - update to 7.7.0+dfsg-2+deb11u2
heimdal - addressed in versions 7.7.1-1.el7, 7.7.1-1.el8, 7.7.1-1.fc35, 7.7.1-1.fc36, 7.7.1-1.fc37, 7.7.1-3.fc35, 7.7.1-3.fc36, 7.7.1-3.fc37
libgssapi3-heimdal (Ubuntu package) - addressed in versions Ubuntu Pro (Infra-only), 7.5.0+dfsg-1ubuntu0.3, 7.7.0+dfsg-1ubuntu1.3
libhdb9-heimdal (Ubuntu package) - addressed in versions Ubuntu Pro (Infra-only), 7.5.0+dfsg-1ubuntu0.3, 7.7.0+dfsg-1ubuntu1.3
libasn1-8-heimdal (Ubuntu package) - addressed in versions Ubuntu Pro (Infra-only), 7.5.0+dfsg-1ubuntu0.3, 7.7.0+dfsg-1ubuntu1.3
libkrb5-26-heimdal (Ubuntu package) - addressed in versions Ubuntu Pro (Infra-only), 7.5.0+dfsg-1ubuntu0.3, 7.7.0+dfsg-1ubuntu1.3
libhx509-5-heimdal (Ubuntu package) - addressed in versions Ubuntu Pro (Infra-only), 7.5.0+dfsg-1ubuntu0.3, 7.7.0+dfsg-1ubuntu1.3
cflinuxfs3 - update to 0.349.0
Platform Automation Toolkit - addressed in versions 4.4.31, 5.0.24, 5.1.0
heimdal (Debian package) - update to 7.7.0+dfsg-2+deb11u2
heimdal - addressed in versions 7.7.1-1.el7, 7.7.1-1.el8, 7.7.1-1.fc35, 7.7.1-1.fc36, 7.7.1-1.fc37, 7.7.1-3.fc35, 7.7.1-3.fc36, 7.7.1-3.fc37
External References
Related Security Bulletins
- Multiple vulnerabilities in Heimdal
- FreeBSD update for heimdal
- Debian update for heimdal
- Ubuntu update for heimdal
- Cloud Foundry Foundation cflinuxfs3 update for Heimdal
- Multiple vulnerabilities in VMware Tanzu Platform Automation Toolkit
- Fedora 37 update for heimdal
- Fedora 36 update for heimdal
- Fedora 35 update for heimdal
- Fedora EPEL 8 update for heimdal
- Fedora EPEL 7 update for heimdal
- Fedora 37 update for heimdal
- Fedora 35 update for heimdal
- Fedora 36 update for heimdal