Date: Mon, 24 Mar 2014 15:47:07 -0400 (EDT) From: cve-assign@...re.org To: security@....org Cc: cve-assign@...re.org, oss-security@...ts.openwall.com Subject: Re: Xen Security Advisory 90 - Linux netback crash trying to disable due to malformed packet -----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 > XSA-90 > it tries to disable the interface ... This involves taking a mutex ... > sleeping is not allowed ... The end result is that the backend domain > (often, Dom0) crashes with "scheduling while atomic". Malicious guest > administrators can cause denial of service. Use CVE-2014-2580. > This bug was publicly reported on xen-devel, before it was appreciated > that there was a security problem. The public mailing list thread > nevertheless contains information strongly suggestive of a security > bug, and a different security bug (with CVE) is suggested as seeming > "similar". We didn't happen to notice a CVE ID of a similar bug within xen-devel. In some cases, we would use that bug's CVE ID (if available) within a "NOTE:" sentence at the end of a new vulnerability's CVE description. http://lists.xen.org/archives/html/xen-devel/2014-03/msg02707.html says "by removing these checks we are introducing a way for a malicious or buggy guest to trigger misbehaviour in the backend, leading to e.g. a DoS" but we haven't tried to track down whether that is directly applicable. - -- CVE assignment team, MITRE CVE Numbering Authority M/S M300 202 Burlington Road, Bedford, MA 01730 USA [ PGP key available through http://cve.mitre.org/cve/request_id.html ] -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.14 (SunOS) iQEcBAEBAgAGBQJTMIp6AAoJEKllVAevmvms3GwH/0Vkny8mbIwqAjuiyhWXYsCd Ys5QRiKv3XmJ8ebt4Mk5FbKOH1tnBupoIJY84iPJmS3lFcwhI7Sm9IkgzWcVw73i cO2D8mjfCBS53rpMi27k8dFgU0lE4zpWcuQsv3BtpijUSxLMLvNRpkyFTUdgmuYd FqtaX7N6Us616RjrGnsOmCMLSoOR4/8OCY6ePVkAF9yOhDh7i5JnFhZ75bdDi6lL 6eT3B9rZ//yz4ht/sP2V0gizASNpPO5kd54lkePyrfYr23GwfXGFlPt4RAthrp5Z a3soa6Iqo4QTmG5f0ko5buZOb9M5WF0amzPSeNN6jKn6CBBe8yu0Kbrd7LY6Rs0= =WFEq -----END PGP SIGNATURE-----
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