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CVE-2021-35939

Date: August 25, 2022

It was found that the fix for CVE-2017-7500 and CVE-2017-7501 was incomplete: the check was only implemented for the parent directory of the file to be created. A local unprivileged user who owns another ancestor directory could potentially use this flaw to gain root privileges. The highest threat from this vulnerability is to data confidentiality and integrity as well as system availability.

Severity Score

Related Resources (10)

https://nvd.nist.gov/vuln/detail/CVE-2021-35939
https://github.com/rpm-software-management/rpm/commit/96ec957e281220f8e137a2d5eb23b83a6377d556
https://access.redhat.com/security/cve/CVE-2021-35939
https://bugzilla.redhat.com/show_bug.cgi?id=1964129
https://rpm.org/wiki/Releases/4.18.0
https://security.gentoo.org/glsa/202210-22
https://people.canonical.com/~ubuntu-security/cve/CVE-2021-35939
https://github.com/rpm-software-management/rpm/pull/1919
https://security-tracker.debian.org/tracker/CVE-2021-35939
https://www.mend.io/vulnerability-database/CVE-2021-35939

Severity Score

Weakness Type (CWE)

Link Following

CWE-59

CVSS v3.1

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

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