PT-2017-1179 · Linux+5 · Linux Kernel+5
Publicado
2017-01-10
·
Atualizado
2019-10-03
·
CVE-2017-5551
CVSS v3.1
4.4
Média
| Vetor | AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N |
Name of the Vulnerable Software and Affected Versions
Linux kernel versions prior to 4.9.6
Description
The issue is related to the simple set acl function in the Linux kernel, which has inadequate access control. This can be exploited by a local attacker to elevate privileges during the execution of the setxattr call. The problem arises because the setgid bit is preserved during a setxattr call involving a tmpfs filesystem, allowing local users to gain group privileges by leveraging the existence of a setgid program with restrictions on execute permissions.
Recommendations
For Linux kernel versions prior to 4.9.6, update to version 4.9.6 or later to resolve the issue. As a temporary workaround, consider restricting access to setgid programs to minimize the risk of exploitation.
Correção
Encontrou algum problema na descrição? Tem algo a acrescentar? Fique à vontade para nos escrever 👾
Enumeração de Fraquezas
Identificadores relacionados
Produtos afetados
Alt Linux
Centos
Linux Kernel
Red Hat
Suse
Ubuntu