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CVE-2017-16997

Published: 17 December 2017

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.

Priority

Low

Cvss 3 Severity Score

7.8

Score breakdown

Status

Package Release Status
eglibc
Launchpad, Ubuntu, Debian
hirsute Does not exist

artful Does not exist

bionic Does not exist

cosmic Does not exist

disco Does not exist

eoan Does not exist

focal Does not exist

groovy Does not exist

trusty
Released (2.19-0ubuntu6.14)
upstream Needs triage

xenial Does not exist

zesty Does not exist

glibc
Launchpad, Ubuntu, Debian
hirsute Not vulnerable
(2.27-3ubuntu1)
artful
Released (2.26-0ubuntu2.1)
bionic Not vulnerable
(2.27-3ubuntu1)
cosmic Not vulnerable
(2.27-3ubuntu1)
disco Not vulnerable
(2.27-3ubuntu1)
eoan Not vulnerable
(2.27-3ubuntu1)
focal Not vulnerable
(2.27-3ubuntu1)
groovy Not vulnerable
(2.27-3ubuntu1)
trusty Does not exist

upstream
Released (2.27)
xenial
Released (2.23-0ubuntu10)
zesty Ignored
(end of life)
Patches:
upstream: https://sourceware.org/git/gitweb.cgi?p=glibc.git;h=3e3c904daef69b8bf7d5cc07f793c9f07c3553ef (master)
upstream: https://sourceware.org/git/gitweb.cgi?p=glibc.git;h=4ebd0c4191c6073cc8a7c5fdcf1d182c4719bcbb (release/2.26/master)
upstream: https://sourceware.org/git/gitweb.cgi?p=glibc.git;h=f24c345bf5486cc8d659f7a17463adcae402ec8e (release/2.24/master)

Severity score breakdown

Parameter Value
Base score 7.8
Attack vector Local
Attack complexity Low
Privileges required None
User interaction Required
Scope Unchanged
Confidentiality High
Integrity impact High
Availability impact High
Vector CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H