High severity · published Dec 18, 2017
CVE-2017-16997
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…
7.8
CVSS
2.9%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Attack vector
Local
Complexity
Low
Privileges
None
User interaction
Required
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)2.9% · higher than 87% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
EL
Enterprise Linux Desktop · Redhat
7.0 · source: NVD
EL
Enterprise Linux Server · Redhat
7.0 · source: NVD
EL
Enterprise Linux Workstation · Redhat
7.0 · source: NVD
GL
Glibc · Gnu
2.19; 2.20; 2.21; 2.22; 2.23; 2.25; +1 more · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2017-16997
CVE.org
https://www.cve.org/CVERecord?id=CVE-2017-16997
Third Party Advisory
http://www.securityfocus.com/bid/102228
Third Party Advisory
https://access.redhat.com/errata/RHBA-2019:0327
Third Party Advisory
https://access.redhat.com/errata/RHSA-2018:3092
Issue Tracking
https://bugs.debian.org/884615
Issue Tracking
https://sourceware.org/bugzilla/show_bug.cgi?id=22625
Issue Tracking
https://sourceware.org/ml/libc-alpha/2017-12/msg00528.html
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