CVE-2019-13272
CVE-2019-13272
Em resumo
Uma falha no kernel Linux permite que um usuário local ganhe privilégios de administrador explorando como o sistema registra credenciais de processos ao criar relações de rastreamento de processos. Isso pode ocorrer quando um processo pai reduz seus privilégios e executa um novo programa, dando potencialmente controle a um invasor.
Detalhe técnico
CVE-2019-13272 envolve uma vulnerabilidade de registro de credenciais em ptrace_link do kernel/ptrace.c que falha ao marcar corretamente relações de ptrace privilegiadas. O ataque explora cenários com processos pai-filho onde redução de privilégios precede execve(), combinado com problemas de tempo de vida de objetos, sendo explorável através de helpers como pkexec do Polkit com PTRACE_TRACEME, permitindo escalação de privilégio local para root.
Resumo gerado e traduzido por IA a partir da descrição oficial.
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.
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Produtos afetados
n/a · n/aPoCs públicas encontradas — 29
githubgithub.com/jas502n/CVE-2019-13272★ 332githubgithub.com/Cyc1eC/CVE-2019-13272★ 5githubgithub.com/oneoy/CVE-2019-13272★ 4githubgithub.com/josemlwdf/CVE-2019-13272★ 3githubgithub.com/Tharana/vulnerability-exploitation★ 3githubgithub.com/MDS1GNAL/ptrace_scope-CVE-2019-13272-privilege-escalation★ 2githubgithub.com/bigbigliang-malwarebenchmark/cve-2019-13272★ 1githubgithub.com/Tharana/Exploiting-a-Linux-kernel-vulnerability★ 1githubgithub.com/datntsec/CVE-2019-13272★ 0githubgithub.com/jana30116/CVE-2019-13272-Local-Privilege-Escalation★ 0githubgithub.com/GgKendall/secureCodingDemo★ 0githubgithub.com/babyshen/CVE-2019-13272★ 0githubgithub.com/asepsaepdin/CVE-2019-13272★ 0githubgithub.com/Chinmay1743/ptrace-vuln★ 0githubgithub.com/letsr00t/CVE-2019-13272★ 0githubgithub.com/polosec/CVE-2019-13272★ 0githubgithub.com/sumedhaDharmasena/-Kernel-ptrace-c-mishandles-vulnerability-CVE-2019-13272★ 0githubgithub.com/RashmikaEkanayake/Privilege-Escalation-CVE-2019-13272-★ 0githubgithub.com/teddy47/CVE-2019-13272---Documentation★ 0exploitdbwww.exploit-db.com/exploits/47543não verificadocve_referencepacketstormsecurity.com/files/153702/Slackware-Security-Advisory-Slackware-14.2-kernel-Updates.htmlnão verificadocve_referencepacketstormsecurity.com/files/154245/Kernel-Live-Patch-Security-Notice-LSN-0054-1.htmlnão verificadocve_referencepacketstormsecurity.com/files/154957/Linux-Polkit-pkexec-Helper-PTRACE_TRACEME-Local-Root.htmlnão verificadocve_referencepacketstormsecurity.com/files/156929/Linux-PTRACE_TRACEME-Local-Root.htmlnão verificadocve_referencepacketstormsecurity.com/files/165051/Linux-Kernel-5.1.x-PTRACE_TRACEME-pkexec-Local-Privilege-Escalation.htmlnão verificadoexploitdbwww.exploit-db.com/exploits/47133não verificadoexploitdbwww.exploit-db.com/exploits/47163não verificadoexploitdbwww.exploit-db.com/exploits/50541não verificadocve_referencepacketstormsecurity.com/files/153663/Linux-PTRACE_TRACEME-Broken-Permission-Object-Lifetime-Handling.htmlnão verificado⚠ Recursos públicos, para você avaliar a exposição de sistemas que controla ou está autorizado a testar. Teste apenas com autorização.
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Falar com a TrueHacking →Referências
http://packetstormsecurity.com/files/153663/Linux-PTRACE_TRACEME-Broken-Permission-Object-Lifetime-Handling.htmlhttp://packetstormsecurity.com/files/153702/Slackware-Security-Advisory-Slackware-14.2-kernel-Updates.htmlhttp://packetstormsecurity.com/files/154245/Kernel-Live-Patch-Security-Notice-LSN-0054-1.htmlhttp://packetstormsecurity.com/files/154957/Linux-Polkit-pkexec-Helper-PTRACE_TRACEME-Local-Root.htmlhttp://packetstormsecurity.com/files/156929/Linux-PTRACE_TRACEME-Local-Root.htmlhttp://packetstormsecurity.com/files/165051/Linux-Kernel-5.1.x-PTRACE_TRACEME-pkexec-Local-Privilege-Escalation.htmlhttps://access.redhat.com/errata/RHSA-2019:2405https://access.redhat.com/errata/RHSA-2019:2411https://access.redhat.com/errata/RHSA-2019:2809https://bugs.chromium.org/p/project-zero/issues/detail?id=1903https://bugzilla.redhat.com/show_bug.cgi?id=1730895https://bugzilla.suse.com/show_bug.cgi?id=1140671