cve/2017/CVE-2017-16997.md

CVE-2017-16997

Description

elf/dl-load.c in the GNU C Library (aka glibc or libc6) 2.19 through 2.26 mishandles RPATH and RUNPATH containing $ORIGIN for a privileged (setuid or AT_SECURE) program, which allows local users to gain privileges via a Trojan horse library in the current working directory, related to the fillin_rpath and decompose_rpath functions. This is associated with misinterpretion of an empty RPATH/RUNPATH token as the "./" directory. NOTE: this configuration of RPATH/RUNPATH for a privileged program is apparently very uncommon; most likely, no such program is shipped with any common Linux distribution.

POC

Reference

No PoCs from references.

Github

• https://github.com/Xiami2012/CVE-2017-16997-poc
• https://github.com/ericcalabretta/inspec_resource_hab_pkg_deps
• https://github.com/flyrev/security-scan-ci-presentation