CVE-2015-8777
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
02 Description
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
03 Exploitation and scoring
- Exploitation
- Not assessed. CISA has not published an exploitation assessment for this record, and it is not in the KEV catalog. That is an absence of assessment, not a finding of no risk.
- SSVC decision
- Not assessed by CISA
- EPSS probability
- 0.57% probability of exploitation activity in the next 30 days.
- EPSS percentile
- Equal to or higher than the score of 46.8% of scored records. A rank, not a probability.
- NVD base score
- 5.5 (CVSS v3.x), scored by the NVD independently of the CNA.
- NVD CVSS vector
- CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N
- NVD analysis status
- Modified. NVD last modified this record on 2026-06-17.
- Red Hat severity
- Low. Red Hat's rating for its own products, not a CVSS rating.
Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.
04 Metadata
- Published
- 2016-01-20 02:00Z10 YR AGO
- Last updated
- 2024-08-06 08:29Z2 YR AGO
- Reserved
- 2016-01-19
- Assigning CNA
- redhat
- Record state
- PUBLISHED
- Severity
- Not rated by the issuing CNA
- CNA CVSS vector
- Not published by the issuing CNA
- Weaknesses
- Data version
- 5.1
- Document digest
- a905b1a11f6af5ca43db51789a5894a8b9c711642f911ea3b566c0817bf1cd3b
05 Affected products
06 References
- lists.opensuse.orgSUSE-SU-2016:0471http://lists.opensuse.org/opensuse-security-announce/2016-02/msg00037.html
- access.redhat.comRHSA-2017:1916https://access.redhat.com/errata/RHSA-2017:1916
- hmarco.orghttp://hmarco.org/bugs/glibc_ptr_mangle_weakness.html
- lists.opensuse.orgSUSE-SU-2016:0470http://lists.opensuse.org/opensuse-security-announce/2016-02/msg00036.html
- www.ubuntu.comUSN-2985-2http://www.ubuntu.com/usn/USN-2985-2
- www.openwall.com[oss-security] 20160119 Re: CVE assignment request for security bugs fixed in glibc 2.23http://www.openwall.com/lists/oss-security/2016/01/20/1
- security.gentoo.orgGLSA-201702-11https://security.gentoo.org/glsa/201702-11
- lists.opensuse.orgSUSE-SU-2016:0472http://lists.opensuse.org/opensuse-security-announce/2016-02/msg00038.html
- lists.opensuse.orgSUSE-SU-2016:0473http://lists.opensuse.org/opensuse-security-announce/2016-02/msg00039.html
- www.securityfocus.com81469http://www.securityfocus.com/bid/81469
- sourceware.orghttps://sourceware.org/bugzilla/show_bug.cgi?id=18928
- lists.fedoraproject.orgFEDORA-2016-0480defc94http://lists.fedoraproject.org/pipermail/package-announce/2016-February/177404.html
- www.debian.orgDSA-3480http://www.debian.org/security/2016/dsa-3480
- www.ubuntu.comUSN-2985-1http://www.ubuntu.com/usn/USN-2985-1
- www.securitytracker.com1034811http://www.securitytracker.com/id/1034811
07 Fixed in
Debian 12
- glibc Fixed in 2.21-1
Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.
Debian 13
- glibc Fixed in 2.21-1
Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.
Debian 14
- glibc Fixed in 2.21-1
Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu 14.04 LTS
- eglibc Fixed in 2.19-0ubuntu6.8
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
A release or ecosystem missing from this list has no record here. It may be unaffected or not covered by the source. Source notices and licences.