Vulnerability CVE-2015-8777
Published: 2016-01-20

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 LD_POINTER_GUARD environment variable.

Type:

CWE-254

 (Security Features)

CVSS2 => (AV:L/AC:L/Au:N/C:N/I:P/A:N)

CVSS Base Score
Impact Subscore
Exploitability Subscore
2.1/10
2.9/10
3.9/10
Exploit range
Attack complexity
Authentication
Local
Low
No required
Confidentiality impact
Integrity impact
Availability impact
None
Partial
None
Affected software
GNU -> Glibc 

 References:
http://hmarco.org/bugs/glibc_ptr_mangle_weakness.html
http://lists.fedoraproject.org/pipermail/package-announce/2016-February/177404.html
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.debian.org/security/2016/dsa-3480
http://www.openwall.com/lists/oss-security/2016/01/20/1
http://www.securityfocus.com/bid/81469
http://www.securitytracker.com/id/1034811
http://www.ubuntu.com/usn/USN-2985-1
http://www.ubuntu.com/usn/USN-2985-2
https://access.redhat.com/errata/RHSA-2017:1916
https://security.gentoo.org/glsa/201702-11
https://sourceware.org/bugzilla/show_bug.cgi?id=18928
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