CVE-2013-4345 Information

Description

Off-by-one error in the get_prng_bytes function in crypto/ansi_cprng.c in the Linux kernel through 3.11.4 makes it easier for context-dependent attackers to defeat cryptographic protection mechanisms via multiple requests for small amounts of data leading to improper management of the state of the consumed data.

Reference

http://marc.info/?l=linux-crypto-vger&m=137942122902845&w=2 http://rhn.redhat.com/errata/RHSA-2013-1449.html http://rhn.redhat.com/errata/RHSA-2013-1490.html http://rhn.redhat.com/errata/RHSA-2013-1645.html http://www.securityfocus.com/bid/62740 http://www.ubuntu.com/usn/USN-2064-1 http://www.ubuntu.com/usn/USN-2065-1 http://www.ubuntu.com/usn/USN-2068-1 http://www.ubuntu.com/usn/USN-2070-1 http://www.ubuntu.com/usn/USN-2071-1 http://www.ubuntu.com/usn/USN-2072-1 http://www.ubuntu.com/usn/USN-2074-1 http://www.ubuntu.com/usn/USN-2075-1 http://www.ubuntu.com/usn/USN-2076-1 http://www.ubuntu.com/usn/USN-2109-1 http://www.ubuntu.com/usn/USN-2110-1 http://www.ubuntu.com/usn/USN-2158-1 https://bugzilla.redhat.com/show_bug.cgi?id=1007690