fei9747

4 exploits Active since Nov 2016
CVE-2021-3493 NOMISEC HIGH WORKING POC
2021 Ubuntu Overlayfs LPE
The overlayfs implementation in the linux kernel did not properly validate with respect to user namespaces the setting of file capabilities on files in an underlying file system. Due to the combination of unprivileged user namespaces along with a patch carried in the Ubuntu kernel to allow unprivileged overlay mounts, an attacker could use this to gain elevated privileges.
1 stars
CVSS 8.8
CVE-2021-4034 NOMISEC HIGH WORKING POC
Local Privilege Escalation in polkits pkexec
A local privilege escalation vulnerability was found on polkit's pkexec utility. The pkexec application is a setuid tool designed to allow unprivileged users to run commands as privileged users according predefined policies. The current version of pkexec doesn't handle the calling parameters count correctly and ends trying to execute environment variables as commands. An attacker can leverage this by crafting environment variables in such a way it'll induce pkexec to execute arbitrary code. When successfully executed the attack can cause a local privilege escalation given unprivileged users administrative rights on the target machine.
CVSS 7.8
CVE-2016-5195 NOMISEC HIGH WORKING POC
Linux Kernel 2.x-4.x < 4.8.3 - Local Privilege Escalation via Dirty COW Race Condition
Race condition in mm/gup.c in the Linux kernel 2.x through 4.x before 4.8.3 allows local users to gain privileges by leveraging incorrect handling of a copy-on-write (COW) feature to write to a read-only memory mapping, as exploited in the wild in October 2016, aka "Dirty COW."
CVSS 7.0
CVE-2017-16995 NOMISEC HIGH WORKING POC
Linux BPF Sign Extension Local Privilege Escalation
The check_alu_op function in kernel/bpf/verifier.c in the Linux kernel through 4.4 allows local users to cause a denial of service (memory corruption) or possibly have unspecified other impact by leveraging incorrect sign extension.
CVSS 7.8