Permissions, Privileges, and Access Controls in Glibc - CVE-2011-1658

Detailed vulnerability description

The vulnerability allows a remote non-authenticated attacker to read and manipulate data.

ld.so in the GNU C Library (aka glibc or libc6) 2.13 and earlier expands the $ORIGIN dynamic string token when RPATH is composed entirely of this token, which might allow local users to gain privileges by creating a hard link in an arbitrary directory to a (1) setuid or (2) setgid program with this RPATH value, and then executing the program with a crafted value for the LD_PRELOAD environment variable, a different vulnerability than CVE-2010-3847 and CVE-2011-0536. NOTE: it is not expected that any standard operating-system distribution would ship an applicable setuid or setgid program.

How to mitigate CVE-2011-1658

Sources

• http://secunia.com/advisories/46397
• http://sourceware.org/bugzilla/show_bug.cgi?id=12393
• http://www.securityfocus.com/archive/1/520102/100/0/threaded
• http://www.vmware.com/security/advisories/VMSA-2011-0012.html
• https://bugzilla.redhat.com/show_bug.cgi?id=667974
• https://exchange.xforce.ibmcloud.com/vulnerabilities/66820