CVE detail
CVE-2021-4034: Red Hat Polkit Out-of-Bounds Read and Write Vulnerability
Source: CISA Known Exploited Vulnerabilities catalog · back to feed
Vendor / product
Red Hat · Polkit
- Date added (KEV)
- Jun 27, 2022
- CISA due date
- Jul 18, 2022
- Ransomware campaign use
- Known
Scorifya interpretation
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Plain English
Technical detail
From CISA
The Red Hat polkit pkexec utility contains an out-of-bounds read and write vulnerability that allows for privilege escalation with administrative rights.
https://nvd.nist.gov/vuln/detail/CVE-2021-4034
See what attackers can see on your domain
This vulnerability is on CISA's Known Exploited Vulnerabilities list, so it is being exploited in the wild right now, including in ransomware campaigns. Scorifya can't test for Red Hat directly, but in about 30 seconds it shows what your own domain exposes publicly across TLS, security headers, DNS, and cookies: the surface attackers probe first.
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See Scorifya Controls →References
- https://access.redhat.com/security/vulnerabilities/RHSB-2022-001MitigationVendor Advisory
- https://access.redhat.com/security/vulnerabilities/RHSB-2022-001MitigationVendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=2025869Issue TrackingPatch
- https://gitlab.freedesktop.org/polkit/polkit/-/commit/a2bf5c9c83b6ae46cbd5c779d3055bff81ded683Patch
- https://www.oracle.com/security-alerts/cpuapr2022.htmlPatchThird Party Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=2025869Issue TrackingPatch
- https://gitlab.freedesktop.org/polkit/polkit/-/commit/a2bf5c9c83b6ae46cbd5c779d3055bff81ded683Patch
- https://www.oracle.com/security-alerts/cpuapr2022.htmlPatchThird Party Advisory
- https://www.qualys.com/2022/01/25/cve-2021-4034/pwnkit.txtExploitMitigationThird Party Advisory
- https://www.qualys.com/2022/01/25/cve-2021-4034/pwnkit.txtExploitMitigationThird Party Advisory
- http://packetstormsecurity.com/files/166196/Polkit-pkexec-Local-Privilege-Escalation.htmlExploitThird Party AdvisoryVDB Entry
- http://packetstormsecurity.com/files/166200/Polkit-pkexec-Privilege-Escalation.htmlThird Party AdvisoryVDB Entry
- https://cert-portal.siemens.com/productcert/pdf/ssa-330556.pdfThird Party Advisory
- https://www.secpod.com/blog/local-privilege-escalation-vulnerability-in-major-linux-distributions-cve-2021-4034/ExploitThird Party Advisory
- https://www.starwindsoftware.com/security/sw-20220818-0001/Third Party Advisory
- https://www.suse.com/support/kb/doc/?id=000020564Third Party Advisory
- http://packetstormsecurity.com/files/166196/Polkit-pkexec-Local-Privilege-Escalation.htmlExploitThird Party AdvisoryVDB Entry
- http://packetstormsecurity.com/files/166200/Polkit-pkexec-Privilege-Escalation.htmlThird Party AdvisoryVDB Entry
- https://cert-portal.siemens.com/productcert/pdf/ssa-330556.pdfThird Party Advisory
- https://www.secpod.com/blog/local-privilege-escalation-vulnerability-in-major-linux-distributions-cve-2021-4034/ExploitThird Party Advisory
- https://www.starwindsoftware.com/security/sw-20220818-0001/Third Party Advisory
- https://www.suse.com/support/kb/doc/?id=000020564Third Party Advisory
- https://www.vicarius.io/vsociety/posts/pwnkit-pkexec-lpe-cve-2021-4034ExploitThird Party Advisory
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-4034US Government Resource
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