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CVE-2017-16997

7.8 · HIGH

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…

Published Dec 18, 2017CWE-426EPSS 2.90%

Overview

CVE-2017-16997 is a high-severity vulnerability. It was published on December 18, 2017 and has a CVSS 3.0 base score of 7.8 (HIGH).

This vulnerability has a CVSS 3.0 base score of 7.8, rated HIGH. It requires local or adjacent network access to exploit. No authentication or special privileges are required for exploitation.

Technical 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.

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

Refwww.securityfocus.com/bid/102228Refaccess.redhat.com/errata/RHBA-2019:0327Refaccess.redhat.com/errata/RHSA-2018:3092Refbugs.debian.org/884615Refsourceware.org/bugzilla/show_bug.cgi?id=22625Refsourceware.org/ml/libc-alpha/2017-12/msg00528.htmlRefwww.securityfocus.com/bid/102228Refaccess.redhat.com/errata/RHBA-2019:0327Refaccess.redhat.com/errata/RHSA-2018:3092Refbugs.debian.org/884615

How CyberStrike helps

Frequently asked questions

What is CVE-2017-16997?

CVE-2017-16997 is a high-severity vulnerability. It was published on December 18, 2017 and has a CVSS 3.0 base score of 7.8 (HIGH).

How severe is CVE-2017-16997?

This vulnerability has a CVSS 3.0 base score of 7.8, rated HIGH. It requires local or adjacent network access to exploit. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2017-16997?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2017-16997?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2017-16997 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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