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CVE-2021-23239

Good to know:

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Date: January 11, 2021

The sudoedit personality of Sudo before 1.9.5 may allow a local unprivileged user to perform arbitrary directory-existence tests by winning a sudo_edit.c race condition in replacing a user-controlled directory by a symlink to an arbitrary path.

Language: C

Severity Score

Related Resources (16)

https://bugzilla.suse.com/show_bug.cgi?id=CVE-2021-23239
https://github.com/sudo-project/sudo/commit/db1f27c0350e9e437c93780ffe88648ae1984467
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/GMY4VSSBIND7VAYSN6T7XIWJRWG4GBB3/
https://security.gentoo.org/glsa/202101-33
https://lists.debian.org/debian-lts-announce/2022/11/msg00007.html
https://security-tracker.debian.org/tracker/CVE-2021-23239
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/EE42Y35SMJOLONAIBNYNFC7J44UUZ2Y6/
https://nvd.nist.gov/vuln/detail/CVE-2021-23239
https://access.redhat.com/security/cve/CVE-2021-23239
https://security.alpinelinux.org/vuln/CVE-2021-23239
https://people.canonical.com/~ubuntu-security/cve/CVE-2021-23239
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/EE42Y35SMJOLONAIBNYNFC7J44UUZ2Y6/
https://www.sudo.ws/stable.html#1.9.5
https://security.netapp.com/advisory/ntap-20210129-0010/
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/GMY4VSSBIND7VAYSN6T7XIWJRWG4GBB3/
https://www.mend.io/vulnerability-database/CVE-2021-23239

Severity Score

Weakness Type (CWE)

Improper Link Resolution Before File Access ('Link Following')

CWE-59

CVSS v3.1

Base Score:
Attack Vector (AV): LOCAL
Attack Complexity (AC): HIGH
Privileges Required (PR): LOW
User Interaction (UI): NONE
Scope (S): UNCHANGED
Confidentiality (C): LOW
Integrity (I): NONE
Availability (A): NONE

CVSS v2

Base Score:
Access Vector (AV): LOCAL
Access Complexity (AC): MEDIUM
Authentication (AU): NONE
Confidentiality (C): PARTIAL
Integrity (I): NONE
Availability (A): NONE
Additional information:

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