Security Features Affecting glibc package, versions <2.21-1
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-DEBIAN9-GLIBC-356580
- published20 Jan 2016
- disclosed20 Jan 2016
Introduced: 20 Jan 2016
CVE-2015-8777 (opens in a new tab)How to fix?
Upgrade Debian:9 glibc to version 2.21-1 or higher.
NVD Description
Note: Versions mentioned in the description apply only to the upstream glibc package and not the glibc package as distributed by Debian.
See How to fix? for Debian:9 relevant fixed versions and status.
The process_envvars function in elf/rtld.c in the GNU C Library (aka glibc or libc6) before 2.23 allows local users to bypass a pointer-guarding protection mechanism via a zero value of the LD_POINTER_GUARD environment variable.
References
- https://security-tracker.debian.org/tracker/CVE-2015-8777
- http://www.debian.org/security/2016/dsa-3480
- http://lists.fedoraproject.org/pipermail/package-announce/2016-February/177404.html
- https://security.gentoo.org/glsa/201702-11
- http://hmarco.org/bugs/glibc_ptr_mangle_weakness.html
- https://sourceware.org/bugzilla/show_bug.cgi?id=18928
- http://lists.opensuse.org/opensuse-security-announce/2016-02/msg00036.html
- http://lists.opensuse.org/opensuse-security-announce/2016-02/msg00037.html
- http://lists.opensuse.org/opensuse-security-announce/2016-02/msg00038.html
- http://lists.opensuse.org/opensuse-security-announce/2016-02/msg00039.html
- http://www.openwall.com/lists/oss-security/2016/01/20/1
- https://access.redhat.com/errata/RHSA-2017:1916
- http://www.securityfocus.com/bid/81469
- http://www.securitytracker.com/id/1034811
- http://people.ubuntu.com/~ubuntu-security/cve/CVE-2015-8777
- http://www.ubuntu.com/usn/USN-2985-1
- http://www.ubuntu.com/usn/USN-2985-2