Date: Sun, 30 Aug 2009 19:15:34 +0800 From: Eugene Teo <eugeneteo@...nel.sg> To: oss-security@...ts.openwall.com CC: Greg KH <gregkh@...e.de> Subject: Re: CVE-2009-2698 kernel: udp socket NULL ptr dereference Eugene Teo wrote: > A flaw was found in the udp_sendmsg() implementation in the Linux kernel > when using the MSG_MORE flag on UDP sockets. A local, unprivileged user > could use this flaw to cause a local denial of service or escalate their > privileges. This was fixed by Herbert Xu in v2.6.19-rc1, and reported by > Tavis Ormandy and Julien Tinnes of the Google Security Team. > > Upstream commits: > http://git.kernel.org/linus/1e0c14f49d6b393179f423abbac47f85618d3d46 > > References: > https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2009-2698 > https://rhn.redhat.com/errata/RHSA-2009-1222.html > https://rhn.redhat.com/errata/RHSA-2009-1223.html Related to this: Add a check in ip_append_data() for NULL *rtp to prevent future bugs in callers from being exploitable. http://git.kernel.org/linus/788d908f2879a17e5f80924f3da2e23f1034482d Thanks, Eugene
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