CVE-2017-16997

high

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.

References

https://sourceware.org/ml/libc-alpha/2017-12/msg00528.html

https://sourceware.org/bugzilla/show_bug.cgi?id=22625

https://bugs.debian.org/884615

https://access.redhat.com/errata/RHSA-2018:3092

https://access.redhat.com/errata/RHBA-2019:0327

http://www.securityfocus.com/bid/102228

Details

Source: Mitre, NVD

Published: 2017-12-18

Updated: 2020-10-15

Risk Information

CVSS v2

Base Score: 9.3

Vector: CVSS2#AV:N/AC:M/Au:N/C:C/I:C/A:C

Severity: High

CVSS v3

Base Score: 7.8

Vector: CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Severity: High