CVE-2021-4034
7.8 Élevée Exploitée activement Utilisée par des rançongicielsCatalogue CISA KEV — Red Hat Polkit Out-of-Bounds Read and Write Vulnerability
Ajoutée le 27/06/2022 · Échéance de correction (agences US) : 18/07/2022
Action requise : Apply updates per vendor instructions.
Description
A local privilege escalation vulnerability was found on polkit's pkexec utility. The pkexec application is a setuid tool designed to allow unprivileged users to run commands as privileged users according predefined policies. The current version of pkexec doesn't handle the calling parameters count correctly and ends trying to execute environment variables as commands. An attacker can leverage this by crafting environment variables in such a way it'll induce pkexec to execute arbitrary code. When successfully executed the attack can cause a local privilege escalation given unprivileged users administrative rights on the target machine.
Produits concernés
- polkit
- Polkit project polkit
- Redhat enterprise linux server update services for sap solutions
- Redhat enterprise linux
- Redhat enterprise linux desktop
- Redhat enterprise linux eus
- Redhat enterprise linux for ibm z systems
- Redhat enterprise linux for ibm z systems eus
- Redhat enterprise linux for power big endian
- Redhat enterprise linux for power little endian
- Redhat enterprise linux for power little endian eus
- Redhat enterprise linux for scientific computing
- Redhat enterprise linux server
- Redhat enterprise linux server aus
- Redhat enterprise linux server eus
- Redhat enterprise linux server tus
- Redhat enterprise linux workstation
- Canonical ubuntu linux
- Suse enterprise storage
- Suse linux enterprise high performance computing
- Suse manager proxy
- Suse manager server
- Suse linux enterprise desktop
- Suse linux enterprise server
- Suse linux enterprise workstation extension
Scores CVSS
| Version | Score | Source | Vecteur |
|---|---|---|---|
| 3.1 | 7.8 Élevée | nvd@nist.gov (NVD) | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
| 3.1 | 7.8 Élevée | 134c704f-9b21-4f2e-91b3-4a467353bcc0 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
| 2.0 | 7.2 Élevée | nvd@nist.gov (NVD) | AV:L/AC:L/Au:N/C:C/I:C/A:C |
Faiblesses (CWE)
Références
- http://packetstormsecurity.com/files/166196/Polkit-pkexec-Local-Privilege-Escalation.html ExploitThird Party AdvisoryVDB Entry
- http://packetstormsecurity.com/files/166200/Polkit-pkexec-Privilege-Escalation.html Third Party AdvisoryVDB Entry
- https://access.redhat.com/security/vulnerabilities/RHSB-2022-001 MitigationVendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=2025869 Issue TrackingPatch
- https://cert-portal.siemens.com/productcert/pdf/ssa-330556.pdf Third Party Advisory
- https://gitlab.freedesktop.org/polkit/polkit/-/commit/a2bf5c9c83b6ae46cbd5c779d3055bff81ded683 Patch
- https://www.oracle.com/security-alerts/cpuapr2022.html PatchThird Party Advisory
- https://www.qualys.com/2022/01/25/cve-2021-4034/pwnkit.txt ExploitMitigationThird 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=000020564 Third Party Advisory
- http://packetstormsecurity.com/files/166196/Polkit-pkexec-Local-Privilege-Escalation.html ExploitThird Party AdvisoryVDB Entry
- http://packetstormsecurity.com/files/166200/Polkit-pkexec-Privilege-Escalation.html Third Party AdvisoryVDB Entry
- https://access.redhat.com/security/vulnerabilities/RHSB-2022-001 MitigationVendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=2025869 Issue TrackingPatch
- https://cert-portal.siemens.com/productcert/pdf/ssa-330556.pdf Third Party Advisory
- https://gitlab.freedesktop.org/polkit/polkit/-/commit/a2bf5c9c83b6ae46cbd5c779d3055bff81ded683 Patch
- https://www.oracle.com/security-alerts/cpuapr2022.html PatchThird Party Advisory
- https://www.qualys.com/2022/01/25/cve-2021-4034/pwnkit.txt ExploitMitigationThird 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=000020564 Third Party Advisory
- https://www.vicarius.io/vsociety/posts/pwnkit-pkexec-lpe-cve-2021-4034 ExploitThird Party Advisory
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-4034 US Government Resource