Red Hat Polkit Out-of-Bounds Read and Write Vulnerability
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…
Severity = CVSS. Probability = EPSS (FIRST). Exploitation = public signals: KEV, EUVD, ransomware, EPSS above 10 %, no account required.
Exploitation probability EPSS · FIRST
Exploitation signals 4 / 5
- KEV catalog (CISA)27 Jun 2022
- Exploited in EUVD (ENISA)27 Jun 2022
- Used by ransomwareyes
- EPSS above 10 %94.9%
- No account, over the networkno
What to do
Fix
Apply the vendor’s fix as soon as it is available.
CISA guidance: Apply updates per vendor instructions.
Meanwhile
Take the service off the internet or restrict access to it, watch the logs and look for signs of compromise.
Manufacturers (CRA)
Exploited vulnerability in your product: early warning to ENISA within 24 h, then notification within 72 h (Article 14 of the Cyber Resilience Act). The CRA explained
Description ENISA EUVD
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.
Affected products
- all
Open source packages OSV
Affected libraries according to OSV, with fixed versions.
Timeline
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Published
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Exploitation reported (ENISA)
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Added to the KEV catalog
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CISA remediation due date
-
EPSS peak: 94.9%
References
Other exploited vulnerabilities from the same vendor
- CVE-2015-5287Red Hat Automatic Bug Reporting Tool Privilege Escalation Vulnerability4.5 · Actively exploited
- CVE-2015-3246Red Hat Libuser Race Condition Vulnerability4.4 · Actively exploited
- CVE-2018-14667Red Hat JBoss RichFaces Framework Expression Language Injection Vulnerability8.5 · Background exploitation
- CVE-2021-3560Red Hat Polkit Incorrect Authorization Vulnerability5.6 · Background exploitation
- CVE-2010-1428Red Hat JBoss Information Disclosure Vulnerability6.9 · Background exploitation
- CVE-2010-0738Red Hat JBoss Authentication Bypass Vulnerability6.7 · Background exploitation