Linux · Kernel
CVE-2019-13272
Linux Kernel Improper Privilege Management Vulnerability
Cos'è
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.
CISA: Kernel/ptrace.c in Linux kernel mishandles contains an improper privilege management vulnerability that allows local users to obtain root access.
Cosa fare
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Scadenza per le agenzie federali USA: 10 giugno 2022
- Aggiunta all'elenco CISA
- 10 dicembre 2021
- Pubblicato
- 17 luglio 2019
- Gravità
- Alta 7,8 CVSS 3.1
- Probabilità di attacchi nei prossimi 30 giorni (EPSS)
- 52% tra il 1,0% più alto di tutte le vulnerabilità note
- Tipo di debolezza
- CWE-269
- Più dettagli
- NVD · CVE.org · CISA
Tutte le fonti (20)
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/OGRK5LYWBJ4E…
- https://www.debian.org/security/2019/dsa-4484
- https://access.redhat.com/errata/RHSA-2019:2405
- https://access.redhat.com/errata/RHSA-2019:2411
- https://usn.ubuntu.com/4093-1/
- https://usn.ubuntu.com/4094-1/
- https://usn.ubuntu.com/4095-1/
- http://packetstormsecurity.com/files/153663/Linux-PTRACE_TRACEME-Broken-Permission-Object-Lifetime-Handling.h…
- https://bugs.chromium.org/p/project-zero/issues/detail?id=1903
- https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.1.17
- https://github.com/torvalds/linux/commit/6994eefb0053799d2e07cd140df6c2ea106c41ee
- https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=6994eefb0053799d2e07cd140df6c2ea10…
- https://bugzilla.suse.com/show_bug.cgi?id=1140671
- https://bugzilla.redhat.com/show_bug.cgi?id=1730895
- https://seclists.org/bugtraq/2019/Jul/30
- https://seclists.org/bugtraq/2019/Jul/33
- https://lists.debian.org/debian-lts-announce/2019/07/msg00022.html
- https://lists.debian.org/debian-lts-announce/2019/07/msg00023.html
- http://packetstormsecurity.com/files/153702/Slackware-Security-Advisory-Slackware-14.2-kernel-Updates.html
- https://security.netapp.com/advisory/ntap-20190806-0001/
Altre falle sfruttate di Linux
| Aggiunto | Vulnerabilità | Prodotto | Gravità | Probabilità di attacco |
|---|---|---|---|---|
| 18 set 2026 | Improper Check for Unusual or Exceptional Conditions | Kernel | Critica 9,8 | 3,3% |
| 18 set 2026 | Race Condition | Kernel | Alta 7,8 | 1,6% |
| 18 set 2026 | Out-of-Bounds Write | Kernel | Alta 8,8 | 0,9% |
| 27 ago 2026 | Unspecified | Kernel | Alta 7,8 | 0,7% |
| 26 ago 2026 | Out-of-Bounds Write | Kernel | Alta 7,8 | 8,9% |
| 2 giu 2026 | Improper Authentication | Kernel | Alta 7,8 | 5,5% |
| 1 mag 2026 | Incorrect Resource Transfer Between Spheres | Kernel | Alta 7,8 | 98% |
| 26 gen 2026 | Integer Overflow | Kernel | Alta 7,8 | 15% |
Fonti: Known Exploited Vulnerabilities (CISA, pubblico dominio), CVE records (cve.org) e EPSS (FIRST). La probabilità di attacco è la stima EPSS che qualcuno provi a sfruttare la falla nei prossimi 30 giorni.