CVE-2017-16997
First published: Sun Dec 17 2017(Updated: )
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.
Credit: security@debian.org security@debian.org
| Affected Software | Affected Version | How to fix |
|---|---|---|
| GNU glibc | =2.19 | |
| GNU glibc | =2.20 | |
| GNU glibc | =2.21 | |
| GNU glibc | =2.22 | |
| GNU glibc | =2.23 | |
| GNU glibc | =2.25 | |
| GNU glibc | =2.26 | |
| Redhat Enterprise Linux Desktop | =7.0 | |
| Redhat Enterprise Linux Server | =7.0 | |
| Redhat Enterprise Linux Workstation | =7.0 | |
| redhat/glibc | <2.25.1 | 2.25.1 |
| debian/glibc | 2.31-13+deb11u11 2.31-13+deb11u10 2.36-9+deb12u9 2.36-9+deb12u7 2.40-4 |
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Reference Links
- http://www.securityfocus.com/bid/102228
- https://access.redhat.com/errata/RHBA-2019:0327
- https://access.redhat.com/errata/RHSA-2018:3092
- https://bugs.debian.org/884615
- https://sourceware.org/bugzilla/show_bug.cgi?id=22625
- https://sourceware.org/ml/libc-alpha/2017-12/msg00528.html
- https://security-tracker.debian.org/tracker/CVE-2017-16997
- https://anonscm.debian.org/cgit/pkg-glibc/glibc.git/commit/?id=f2a51d8
- https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=884615
- http://www.cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2017-16997
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=1526866
- https://sourceware.org/git/gitweb.cgi?p=glibc.git;h=1998843fb78d9b3ebc0216757042ce4b00dd08a1
- https://bugzilla.redhat.com/show_bug.cgi?id=1526865
- https://launchpad.net/bugs/cve/CVE-2017-16997
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2017-16997
- https://nvd.nist.gov/vuln/detail/CVE-2017-16997
- https://ubuntu.com/security/CVE-2017-16997
Frequently Asked Questions
What is CVE-2017-16997?
CVE-2017-16997 is a vulnerability in the GNU C Library (glibc or libc6) that mishandles RPATH and RUNPATH, allowing local users to gain privileges via a Trojan horse library.
How severe is CVE-2017-16997?
CVE-2017-16997 has a severity rating of 7.8 (Critical).
Which software versions are affected by CVE-2017-16997?
Versions of glibc from 2.19 to 2.26 are affected by CVE-2017-16997.
How can I fix CVE-2017-16997?
Update glibc to version 2.28-10+deb10u1 or later, 2.31-13+deb11u6 or later, or 2.36-9+deb12u2 or later.
Where can I find more information about CVE-2017-16997?
More information about CVE-2017-16997 can be found at the following references: [SecurityFocus](http://www.securityfocus.com/bid/102228), [Red Hat Advisory RHBA-2019:0327](https://access.redhat.com/errata/RHBA-2019:0327), [Red Hat Advisory RHSA-2018:3092](https://access.redhat.com/errata/RHSA-2018:3092).
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