CVE-2018-18955
CVE-2018-18955
Vexday Risk Score
40Atención
Decisión SSVC (CISA)
Attend
PoC disponible → seguir de cerca
Madurez del exploit
Exploit funcional
PoC popular en GitHub (23 estrellas) — código de explotación ampliamente disponible.
CVSS —EPSS 7.6%KEV nãoPoC públicaNuclei —Metasploit simPatch referenciado
Ciclo de vida
15 nov 2018Exploit Metasploit disponible
16 nov 2018PoC pública
16 nov 2018Publicada en NVD
Recomendación: Planificar corrección próxima — ya existe PoC pública.
In the Linux kernel 4.15.x through 4.19.x before 4.19.2, map_write() in kernel/user_namespace.c allows privilege escalation because it mishandles nested user namespaces with more than 5 UID or GID ranges. A user who has CAP_SYS_ADMIN in an affected user namespace can bypass access controls on resources outside the namespace, as demonstrated by reading /etc/shadow. This occurs because an ID transformation takes place properly for the namespaced-to-kernel direction but not for the kernel-to-namespaced direction.
Productos afectados
n/a · n/aPoCs públicas encontradas — 9
githubgithub.com/scheatkode/CVE-2018-18955★ 23exploitdbwww.exploit-db.com/exploits/47165no verificadoexploitdbwww.exploit-db.com/exploits/47166no verificadoexploitdbwww.exploit-db.com/exploits/47167no verificadocve_referencewww.exploit-db.com/exploits/45915/no verificadoexploitdbwww.exploit-db.com/exploits/45886no verificadoexploitdbwww.exploit-db.com/exploits/45915no verificadocve_referencewww.exploit-db.com/exploits/45886/no verificadoexploitdbwww.exploit-db.com/exploits/47164no verificado⚠ Recursos públicos, para evaluar la exposición de sistemas que controlas o estás autorizado a probar. Prueba solo con autorización.
Referencias
http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=d2f007dbe7e4c9583eea6eb04d60001e85c6f1bdhttps://bugs.chromium.org/p/project-zero/issues/detail?id=1712https://cdn.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.18.19https://cdn.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.19.2https://github.com/torvalds/linux/commit/d2f007dbe7e4c9583eea6eb04d60001e85c6f1bdhttps://security.netapp.com/advisory/ntap-20190416-0003/https://support.f5.com/csp/article/K39103040https://usn.ubuntu.com/3832-1/https://usn.ubuntu.com/3833-1/https://usn.ubuntu.com/3835-1/https://usn.ubuntu.com/3836-1/https://usn.ubuntu.com/3836-2/