CVE-2021-35937

A race condition vulnerability was found in rpm. A local unprivileged user could use this flaw to bypass the checks that were introduced in response to CVE-2017-7500 and CVE-2017-7501, potentially gaining root privileges. The highest threat from this vulnerability is to data confidentiality and integrity as well as system availability.

Weakness

The product checks the state of a resource before using that resource, but the resource’s state can change between the check and the use in a way that invalidates the results of the check. This can cause the product to perform invalid actions when the resource is in an unexpected state.

Affected Software

Potential Mitigations

Related Attack Patterns

• https://cwe.mitre.org/data/definitions/27.html
• https://cwe.mitre.org/data/definitions/29.html

References

• https://access.redhat.com/security/cve/CVE-2021-35937
• https://bugzilla.redhat.com/show_bug.cgi?id=1964125
• https://rpm.org/wiki/Releases/4.18.0
• https://security.gentoo.org/glsa/202210-22
• https://www.usenix.org/legacy/event/sec05/tech/full_papers/borisov/borisov.pdf