high
7.8
CWE
269
Advisory Published
CVE Published
Updated

CVE-2023-22809

First published: Mon Jan 16 2023(Updated: )

A vulnerability was found in sudo. Exposure in how sudoedit handles user-provided environment variables leads to arbitrary file writing with privileges of the RunAs user (usually root). The prerequisite for exploitation is that the current user must be authorized by the sudoers policy to edit a file using sudoedit.

Credit: CVE-2023-22809 cve@mitre.org cve@mitre.org

Affected SoftwareAffected VersionHow to fix
<13.4
13.4
IBM Security Guardium<=11.3
IBM Security Guardium<=11.4
IBM Security Guardium<=11.5
Sudo Project Sudo>=1.8.0<1.9.12
Sudo Project Sudo=1.9.12
Sudo Project Sudo=1.9.12-p1
Debian Debian Linux=10.0
Debian Debian Linux=11.0
Fedoraproject Fedora=36
Fedoraproject Fedora=37
Apple macOS<13.4
redhat/sudo<1.9.12
1.9.12
redhat/sudo<0:1.8.6p3-29.el6_10.7
0:1.8.6p3-29.el6_10.7
redhat/sudo<0:1.8.23-10.el7_9.3
0:1.8.23-10.el7_9.3
redhat/sudo<0:1.8.19p2-12.el7_4.3
0:1.8.19p2-12.el7_4.3
redhat/sudo<0:1.8.23-3.el7_6.3
0:1.8.23-3.el7_6.3
redhat/sudo<0:1.8.23-4.el7_7.4
0:1.8.23-4.el7_7.4
redhat/sudo<0:1.8.29-8.el8_7.1
0:1.8.29-8.el8_7.1
redhat/sudo<0:1.8.25p1-8.el8_1.3
0:1.8.25p1-8.el8_1.3
redhat/sudo<0:1.8.29-5.el8_2.2
0:1.8.29-5.el8_2.2
redhat/sudo<0:1.8.29-7.el8_4.2
0:1.8.29-7.el8_4.2
redhat/sudo<0:1.8.29-8.el8_6.1
0:1.8.29-8.el8_6.1
redhat/sudo<0:1.9.5p2-7.el9_1.1
0:1.9.5p2-7.el9_1.1
redhat/sudo<0:1.9.5p2-7.el9_0.2
0:1.9.5p2-7.el9_0.2
debian/sudo<=1.8.27-1+deb10u3
1.8.27-1+deb10u5
1.9.5p2-3+deb11u1
1.9.13p3-1+deb12u1
1.9.14p2-1
1.9.15p2-2

Remedy

It is possible to prevent a user-specified editor from being used by sudoedit by adding the following line to the sudoers file. ~~~ Defaults!sudoedit env_delete+="SUDO_EDITOR VISUAL EDITOR" ~~~ To restrict the editor when editing specific files, a Cmnd_Alias can be used, for example: ~~~ Cmnd_Alias EDIT_MOTD = sudoedit /etc/motd Defaults!EDIT_MOTD env_delete+="SUDO_EDITOR VISUAL EDITOR" user ALL = EDIT_MOTD ~~~ But if possible please update the affected package as soon as possible.

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Reference Links

Parent vulnerabilities

(Appears in the following advisories)

Peer vulnerabilities

(Found alongside the following vulnerabilities)

Frequently Asked Questions

  • What is CVE-2023-22809?

    CVE-2023-22809 is a vulnerability in the sudo package that allows a local attacker to escalate privileges by appending arbitrary entries to the list of files to process.

  • How severe is CVE-2023-22809?

    CVE-2023-22809 is considered to be a high severity vulnerability with a severity value of 7.

  • How does CVE-2023-22809 affect sudo?

    CVE-2023-22809 affects sudo versions before 1.9.12p2.

  • How can I fix CVE-2023-22809?

    To fix CVE-2023-22809, update sudo to version 1.9.12p2 or later.

  • Where can I find more information about CVE-2023-22809?

    You can find more information about CVE-2023-22809 at the following sources: - [CVE Website](https://www.cve.org/CVERecord?id=CVE-2023-22809) - [NVD Website](https://nvd.nist.gov/vuln/detail/CVE-2023-22809) - [Sudo GitHub](https://github.com/sudo-project/sudo/releases/tag/SUDO_1_9_12p2) - [Red Hat Bugzilla](https://bugzilla.redhat.com/show_bug.cgi?id=2161142) - [Red Hat Advisory](https://access.redhat.com/errata/RHSA-2023:0287)

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