CISA KEV 정보
| 취약점명 | Linux Kernel Improper Privilege Management Vulnerability |
|---|---|
| 설명 | Kernel/ptrace.c in Linux kernel mishandles contains an improper privilege management vulnerability that allows local users to obtain root access. |
| 조치사항 | Apply updates per vendor instructions. |
| 랜섬웨어 캠페인 악용 | Unknown |
| CWE | CWE-269 |
| 등록일 (KEV) | 2021-12-10 |
| 조치 기한 | 2022-06-10 |
| 추가 참고 | https://nvd.nist.gov/vuln/detail/CVE-2019-13272 |
NVD 상세 정보
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:HAV:L/AC:L/Au:N/C:C/I:C/A:C설명: In the Linux kernel before 5.1.17, ptrace_link in kernel/ptrace.c mishandles the recording of the credentials of a process that wants to create a ptrace relationship, which allows local users to obtain root access by leveraging certain scenarios with a parent-child process relationship, where a parent drops privileges and calls execve (potentially allowing control by an attacker). One contributing factor is an object lifetime issue (which can also cause a panic). Another contributing factor is incorrect marking of a ptrace relationship as privileged, which is exploitable through (for example) Polkit's pkexec helper with PTRACE_TRACEME. NOTE: SELinux deny_ptrace might be a usable workaround in some environments.
참조
- http://packetstormsecurity.com/files/153663/Linux-PTRACE_TRACEME-Broken-Permission-Object-Lifetime-Handling.html [Third Party Advisory, VDB Entry]
- http://packetstormsecurity.com/files/153702/Slackware-Security-Advisory-Slackware-14.2-kernel-Updates.html [Third Party Advisory, VDB Entry]
- http://packetstormsecurity.com/files/154245/Kernel-Live-Patch-Security-Notice-LSN-0054-1.html [Exploit, Third Party Advisory, VDB Entry]
- http://packetstormsecurity.com/files/154957/Linux-Polkit-pkexec-Helper-PTRACE_TRACEME-Local-Root.html [Exploit, Third Party Advisory, VDB Entry]
- http://packetstormsecurity.com/files/156929/Linux-PTRACE_TRACEME-Local-Root.html [Exploit, Third Party Advisory, VDB Entry]
- http://packetstormsecurity.com/files/165051/Linux-Kernel-5.1.x-PTRACE_TRACEME-pkexec-Local-Privilege-Escalation.html [Exploit, Third Party Advisory, VDB Entry]
- https://access.redhat.com/errata/RHSA-2019:2405 [Third Party Advisory]
- https://access.redhat.com/errata/RHSA-2019:2411 [Third Party Advisory]
- https://access.redhat.com/errata/RHSA-2019:2809 [Third Party Advisory]
- https://bugs.chromium.org/p/project-zero/issues/detail?id=1903 [Exploit, Issue Tracking, Patch, Third Party Advisory]
- https://bugzilla.redhat.com/show_bug.cgi?id=1730895 [Issue Tracking, Patch]
- https://bugzilla.suse.com/show_bug.cgi?id=1140671 [Issue Tracking, Patch, Third Party Advisory]
- https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.1.17 [Patch, Vendor Advisory]
- https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=6994eefb0053799d2e07cd140df6c2ea106c41ee [Patch, Vendor Advisory]
- https://github.com/torvalds/linux/commit/6994eefb0053799d2e07cd140df6c2ea106c41ee [Patch]
- ... 외 44건
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