CVE-2015-8777

low-risk

Published 2016-01-20

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.

Do I need to act?

0.06% chance of exploitation

EPSS score — low exploit probability

Not on CISA KEV list

No confirmed active exploitation reported to CISA

Patch status unknown

Check vendor advisories for fix availability and mitigation guidance

CVSS 5.5/10 Medium

LOCAL / LOW complexity

Affected Products (1)

Glibc

Affected Vendors

Gnu

References (30)

Exploit http://hmarco.org/bugs/glibc_ptr_mangle_weakness.html

http://lists.fedoraproject.org/pipermail/package-announce/2016-February/177404.h...

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

Exploit http://hmarco.org/bugs/glibc_ptr_mangle_weakness.html

http://lists.fedoraproject.org/pipermail/package-announce/2016-February/177404.h...

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

and 10 more references

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low-risk

Severity 18/34 · Moderate

Exploitability 0/34 · Minimal

Exposure 5/34 · Minimal