oss-security - CVE-2012-5532 hypervkvpd DoS

Follow @Openwall on Twitter for new release announcements and other news

[<prev] [next>] [thread-next>] [day] [month] [year] [list]

Message-ID: <20121127182103.GM2689@redhat.com>
Date: Tue, 27 Nov 2012 11:21:03 -0700
From: Vincent Danen <vdanen@...hat.com>
To: oss-security@...ts.openwall.com
Subject: CVE-2012-5532 hypervkvpd DoS

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

-- 
Vincent Danen / Red Hat Security Response Team

Please check out the Open Source Software Security Wiki, which is counterpart to this mailing list.

Confused about mailing lists and their use? Read about mailing lists on Wikipedia and check out these guidelines on proper formatting of your messages.