CVE-2021-3560
Last modified
CVE-2021-3560 is a high-severity vulnerability rated 7.8/10 on the CVSS scale. It was found that polkit could be tricked into bypassing the credential checks for D-Bus requests, elevating the privileges of the requestor to the root user. This flaw could be used by an unprivileged local attacker to, for example, create a new local administrator. CISA has confirmed active exploitation in the wild. EPSS estimates a 22.19% chance of exploitation in the next 30 days.
Description
It was found that polkit could be tricked into bypassing the credential checks for D-Bus requests, elevating the privileges of the requestor to the root user. This flaw could be used by an unprivileged local attacker to, for example, create a new local administrator. The highest threat from this vulnerability is to data confidentiality and integrity as well as system availability.
Metrics
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Exploitation Status
This vulnerability is listed in CISA’s Known Exploited Vulnerabilities catalog, confirming active exploitation in the wild. Federal agencies must remediate by .
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Polkit Project | Polkit | < 0.119 |
| Debian | Debian Linux | 11.0 |
| Canonical | Ubuntu Linux | 20.04 |
| Redhat | Virtualization | 4.0 |
| Redhat | Virtualization Host | 4.0 |
| Redhat | Openshift Container Platform | 4.7 |
References
- http://packetstormsecurity.com/files/172836/polkit-Authentication-Bypass.htmlThird Party Advisory, VDB Entry
- http://packetstormsecurity.com/files/172846/Facebook-Fizz-Denial-Of-Service.htmlThird Party Advisory, VDB Entry
- https://bugzilla.redhat.com/show_bug.cgi?id=1961710Issue Tracking, Patch, Vendor Advisory
- https://github.blog/2021-06-10-privilege-escalation-polkit-root-on-linux-with-bug/Exploit, Third Party Advisory
- http://packetstormsecurity.com/files/172836/polkit-Authentication-Bypass.htmlThird Party Advisory, VDB Entry
- http://packetstormsecurity.com/files/172846/Facebook-Fizz-Denial-Of-Service.htmlThird Party Advisory, VDB Entry
- https://bugzilla.redhat.com/show_bug.cgi?id=1961710Issue Tracking, Patch, Vendor Advisory
- https://github.blog/2021-06-10-privilege-escalation-polkit-root-on-linux-with-bug/Exploit, Third Party Advisory
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-3560US Government Resource
Timeline
- Published
- Last Modified
- Status
- Analyzed
Frequently Asked Questions
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