CVE-2021-33910

medium
New! CVE Severity Now Using CVSS v3

The calculated severity for CVEs has been updated to use CVSS v3 by default. CVEs that do not have a CVSS v3 score will fall back CVSS v2 for calculating severity. Severity display preferences can be toggled in the settings dropdown.

Description

basic/unit-name.c in systemd prior to 246.15, 247.8, 248.5, and 249.1 has a Memory Allocation with an Excessive Size Value (involving strdupa and alloca for a pathname controlled by a local attacker) that results in an operating system crash.

References

https://github.com/systemd/systemd/pull/20256/commits/441e0115646d54f080e5c3bb0ba477c892861ab9

https://www.openwall.com/lists/oss-security/2021/07/20/2

https://security.gentoo.org/glsa/202107-48

https://www.debian.org/security/2021/dsa-4942

http://packetstormsecurity.com/files/163621/Sequoia-A-Deep-Root-In-Linuxs-Filesystem-Layer.html

https://github.com/systemd/systemd-stable/commit/764b74113e36ac5219a4b82a05f311b5a92136ce

https://github.com/systemd/systemd-stable/commit/4a1c5f34bd3e1daed4490e9d97918e504d19733b

https://lists.fedoraproject.org/archives/list/[email protected]/message/2LSDMHAKI4LGFOCSPXNVVSEWQFAVFWR7/

https://github.com/systemd/systemd-stable/commit/b00674347337b7531c92fdb65590ab253bb57538

https://github.com/systemd/systemd/commit/b34a4f0e6729de292cb3b0c03c1d48f246ad896b

https://github.com/systemd/systemd-stable/commit/cfd14c65374027b34dbbc4f0551456c5dc2d1f61

https://lists.fedoraproject.org/archives/list/[email protected]/message/42TMJVNYRY65B4QCJICBYOEIVZV3KUYI/

http://www.openwall.com/lists/oss-security/2021/08/04/2

http://www.openwall.com/lists/oss-security/2021/08/17/3

http://www.openwall.com/lists/oss-security/2021/09/07/3

Details

Source: MITRE

Published: 2021-07-20

Updated: 2021-09-07

Type: CWE-770

Risk Information

CVSS v2

Base Score: 4.9

Vector: AV:L/AC:L/Au:N/C:N/I:N/A:C

Impact Score: 6.9

Exploitability Score: 3.9

Severity: MEDIUM

CVSS v3

Base Score: 5.5

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

Impact Score: 3.6

Exploitability Score: 1.8

Severity: MEDIUM

Tenable Plugins

View all (24 total)

IDNameProductFamilySeverity
152768openSUSE 15 Security Update : systemd (openSUSE-SU-2021:2809-1)NessusSuSE Local Security Checks
medium
152760SUSE SLED15 / SLES15 Security Update : systemd (SUSE-SU-2021:2809-1)NessusSuSE Local Security Checks
medium
152080RHEL 8 : OpenShift Container Platform 4.7.21 (RHSA-2021:2763)NessusRed Hat Local Security Checks
high
152057openSUSE 15 Security Update : systemd (openSUSE-SU-2021:1082-1)NessusSuSE Local Security Checks
high
152015Photon OS 2.0: Systemd PHSA-2021-2.0-0370NessusPhotonOS Local Security Checks
medium
152014Photon OS 1.0: Systemd PHSA-2021-1.0-0415NessusPhotonOS Local Security Checks
medium
152003RHEL 8 : Red Hat Virtualization Host security and bug fix update [ovirt-4.4.7] (Important) (RHSA-2021:2736)NessusRed Hat Local Security Checks
high
151980SUSE SLES12 Security Update : systemd (SUSE-SU-2021:2423-1)NessusSuSE Local Security Checks
high
151964Photon OS 4.0: Systemd PHSA-2021-4.0-0065NessusPhotonOS Local Security Checks
medium
151959Photon OS 3.0: Systemd PHSA-2021-3.0-0270NessusPhotonOS Local Security Checks
medium
151918Oracle Linux 8 : systemd (ELSA-2021-2717)NessusOracle Linux Local Security Checks
medium
151876CentOS 8 : systemd (CESA-2021:2717)NessusCentOS Local Security Checks
medium
151875SUSE SLED15 / SLES15 Security Update : systemd (SUSE-SU-2021:2410-1)NessusSuSE Local Security Checks
high
151869SUSE SLED12 / SLES12 Security Update : systemd (SUSE-SU-2021:2405-1)NessusSuSE Local Security Checks
high
151868SUSE SLED15 / SLES15 Security Update : systemd (SUSE-SU-2021:2404-1)NessusSuSE Local Security Checks
high
151855RHEL 8 : systemd (RHSA-2021:2717)NessusRed Hat Local Security Checks
medium
151854RHEL 8 : systemd (RHSA-2021:2721)NessusRed Hat Local Security Checks
medium
151845RHEL 8 : systemd (RHSA-2021:2724)NessusRed Hat Local Security Checks
medium
151839openSUSE 15 Security Update : systemd (openSUSE-SU-2021:2404-1)NessusSuSE Local Security Checks
high
151838openSUSE 15 Security Update : systemd (openSUSE-SU-2021:2410-1)NessusSuSE Local Security Checks
high
151836Ubuntu 18.04 LTS / 20.04 LTS / 20.10 / 21.04 : systemd vulnerabilities (USN-5013-1)NessusUbuntu Local Security Checks
medium
151835Ubuntu 16.04 LTS : systemd vulnerabilities (USN-5013-2)NessusUbuntu Local Security Checks
medium
151834Debian DLA-2715-1 : systemd - LTS security updateNessusDebian Local Security Checks
high
151833Debian DSA-4942-1 : systemd - security updateNessusDebian Local Security Checks
high