Date: Thu, 7 Mar 2013 13:05:37 +0530 (IST) From: P J P <ppandit@...hat.com> To: oss security list <oss-security@...ts.openwall.com> Subject: CVE-2013-1792 Linux kernel: KEYS: race with concurrent install_user_keyrings() Hello, Mateusz Guzik of Red Hat discovered a race condition in install_user_keyrings() routine, leading to a NULL pointer dereference. It occurs during parallel invocation of the install_user_keyrings & lookup_user_key routines, for the same user, if `uid' and `uid-session' keyrings are not yet created. An unprivileged user could use this flaw to crash the system, resulting in DoS. Upstream fix: ------------- -> https://lkml.org/lkml/2013/3/6/535 Reference: ---------- -> https://bugzilla.redhat.com/show_bug.cgi?id=916646 Thank you. -- Prasad J Pandit / Red Hat Security Response Team DB7A 84C5 D3F9 7CD1 B5EB C939 D048 7860 3655 602B
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