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Re: CVE-2012-5532 hypervkvpd DoS
From: Vincent Danen <vdanen () redhat com>
Date: Tue, 27 Nov 2012 11:55:35 -0700

* [2012-11-27 11:21:03 -0700] Vincent Danen wrote:

Just a heads-up on a flaw that was found:

Florian Weimer of the Red Hat Product Security Team discovered that hypervkvpd
would exit when it processed a spoofed Netlink packet that had been sent from
an untrusted local user, in the following code:

       len = recvfrom(fd, kvp_recv_buffer, sizeof(kvp_recv_buffer), 0,
               addr_p, &addr_l);

       if (len < 0 || addr.nl_pid) {
           syslog(LOG_ERR, "recvfrom failed; pid:%u error:%d %s",
                   addr.nl_pid, errno, strerror(errno));
           close(fd);
           return -1;
       }

This has been corrected upstream already.

References:

https://git.kernel.org/?p=linux/kernel/git/gregkh/char-misc.git;a=commit;h=95a69adab9acfc3981c504737a2b6578e4d846ef
https://bugzilla.redhat.com/show_bug.cgi?id=877572

Ooops.  This is a bit embarrassing.

This is actually CVE-2012-2669.  Please reject CVE-2012-5532 as a
duplicate of CVE-2012-2669.

Thanks.

--
Vincent Danen / Red Hat Security Response Team

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