CVE-2021-4034
Red Hat Polkit Out-of-Bounds Read and Write Vulnerability
- 대응 우선순위
- 최우선
- CVSS
- 7.8
- EPSS
- 94.9% 백분위 99.9% · 2026.06.27 기준
- CISA KEV
- 등록
- 조치 기한
- 2022.07.18
- 공개일
- 2022.01.29
CISA KEV에 등록된 실제 악용 확인 취약점
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...
공급사 Red Hat
제품 Polkit
영향 버전 all, < 121, 7.6, 7.7, 8.0, 7.0, 8.2, 8.4, 8.1, 6.0, 7.3, 7.4, 14.04, 16.04, 18.04, 20.04, 21.10, 15.0, 4.1, 15
수정 버전 121, 3.3.0, 2.0
Apply updates per vendor instructions.
조치 기한: 2022.07.18CVSS 벡터 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CWE CWE-125, CWE-787
KEV 등록일 2022.06.27
랜섬웨어 캠페인 사용 미확인
CISA 비고 https://nvd.nist.gov/vuln/detail/CVE-2021-4034
EPSS 데이터 기준일 2026.06.27