-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 - ------------------------------------------------------------------------- Debian Security Advisory DSA-2501-1 security@xxxxxxxxxx http://www.debian.org/security/ Florian Weimer June 24, 2012 http://www.debian.org/security/faq - ------------------------------------------------------------------------- Package : xen Vulnerability : several Problem type : local Debian-specific: no CVE ID : CVE-2012-0217 CVE-2012-0218 CVE-2012-2934 Several vulnerabilities were discovered in Xen, a hypervisor. CVE-2012-0217 Xen does not properly handle uncanonical return addresses on Intel amd64 CPUs, allowing amd64 PV guests to elevate to hypervisor privileges. AMD processors, HVM and i386 guests are not affected. CVE-2012-0218 Xen does not properly handle SYSCALL and SYSENTER instructions in PV guests, allowing unprivileged users inside a guest system to crash the guest system. CVE-2012-2934 Xen does not detect old AMD CPUs affected by AMD Erratum #121. For CVE-2012-2934, Xen refuses to start domUs on affected systems unless the "allow_unsafe" option is passed. For the stable distribution (squeeze), these problems have been fixed in version 4.0.1-5.2. For the testing distribution (wheezy) and the unstable distribution (sid), these problems have been fixed in version 4.1.3~rc1+hg-20120614.a9c0a89c08f2-1. We recommend that you upgrade your xen packages. Further information about Debian Security Advisories, how to apply these updates to your system and frequently asked questions can be found at: http://www.debian.org/security/ Mailing list: debian-security-announce@xxxxxxxxxxxxxxxx -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.10 (GNU/Linux) iQEcBAEBAgAGBQJP5xeWAAoJEL97/wQC1SS+hJEH/3zAZZyxoaeeqjgIhgbizdfE bF+LpWgAkoUAOjmbScJlLJ9olbHoExezdcUgQho/n47mAOxnuqH6POFpbwNhYFAH iFydEctoIdGA0aO6/wNGJDCP+MIFzgtaF+OHiaK8N5mggMhlE/2Slpu/xHtaZUvX 6DzRCgp/p2E0xTPf+NGj2tBnQ03M5CiqkvkaQXO4kGjYYUfcSJrtJkXKcMBIWIOu /NzCmB8+ueQFCA62K9zbCK9Wmt3wr0PIg//HASsZZiIlpUo8vU6YtmwNA3hzTLD7 tACaiETs4ik/iLW+jv3BJCiA3W5EB4yorcnvGHIwOzOl4UF2ovTAsV5SStYQLKI= =tjtc -----END PGP SIGNATURE-----
