CVE-2015-8777

Priority
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.
Ubuntu-Description
Hector Marco and Ismael Ripoll discovered that the GNU C Library
allowed the pointer-guarding protection mechanism to be disabled by
honoring the LD_POINTER_GUARD environment variable across privilege
boundaries. An local attacker could use this to exploit an existing
vulnerability more easily.
Package
Upstream:needed
Ubuntu 12.04 ESM (Precise Pangolin):released (2.15-0ubuntu10.14)
Ubuntu 14.04 LTS (Trusty Tahr):released (2.19-0ubuntu6.8)
Ubuntu 16.04 LTS (Xenial Xerus):DNE
Package
Source: glibc (LP Ubuntu Debian)
Upstream:released (2.21-6)
Ubuntu 12.04 ESM (Precise Pangolin):DNE
Ubuntu 14.04 LTS (Trusty Tahr):DNE
Ubuntu 16.04 LTS (Xenial Xerus):not-affected (2.23-0ubuntu1)
Patches:
Upstream:https://sourceware.org/git/gitweb.cgi?p=glibc.git;a=commit;h=a014cecd82b71b70a6a843e250e06b541ad524f7
More Information

Updated: 2019-01-14 22:19:35 UTC (commit 51f9b73af244ba86b9321e46e526586c25a8e060)