[SECURITY] [DSA 3554-1] xen security update

Fabricante: Debian
Fecha: 21/04/2016
Identificador: DSA 3554-1
[SECURITY] [DSA 3554-1] xen security update
-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA512 - ------------------------------------------------------------------------- Debian Security Advisory DSA-3554-1 security@debian.org https://www.debian.org/security/ Salvatore Bonaccorso April 21, 2016 https://www.debian.org/security/faq - ------------------------------------------------------------------------- Package : xen CVE ID : CVE-2016-3158 CVE-2016-3159 CVE-2016-3960 Multiple vulnerabilities have been discovered in the Xen hypervisor. The Common Vulnerabilities and Exposures project identifies the following problems: CVE-2016-3158, CVE-2016-3159 (XSA-172) Jan Beulich from SUSE discovered that Xen does not properly handle writes to the hardware FSW.ES bit when running on AMD64 processors. A malicious domain can take advantage of this flaw to obtain address space usage and timing information, about another domain, at a fairly low rate. CVE-2016-3960 (XSA-173) Ling Liu and Yihan Lian of the Cloud Security Team, Qihoo 360 discovered an integer overflow in the x86 shadow pagetable code. A HVM guest using shadow pagetables can cause the host to crash. A PV guest using shadow pagetables (i.e. being migrated) with PV superpages enabled (which is not the default) can crash the host, or corrupt hypervisor memory, potentially leading to privilege escalation. For the stable distribution (jessie), these problems have been fixed in version 4.4.1-9+deb8u5. 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: https://www.debian.org/security/ Mailing list: debian-security-announce@lists.debian.org -----BEGIN PGP SIGNATURE----- Version: GnuPG v1 iQIcBAEBCgAGBQJXGS3gAAoJEAVMuPMTQ89E7yAP/3vSViYygQzMhOLjNKorm0HX TZef5rbAAxDQCrMS8b5OrtcgO+skpy+edOkNiokj7D7fN5idczRgYUQ5Pu3g9Bpb sQcsFg23a9VAniZbDsHCChwBI2/0GGHZK1ndMjcGpu7/8ExwXENAnenTW53UwsW/ /EFVtUjov4NEh0mfRaq0O7ZHi2+MIMWogXxThtz5OOod64kUrbSFl8alUw1vqZWj 5c+ftGUVP4cwCFWAAD6ihNvV65f0grlldkMx/bo5asdbwJ/qNlqtTIdaOf0/TDSE sRMFlte+sBaY5tg+B/l4qUUNMrtkF+QQ6a3nhcwqmnS9JslpG8WqKgurLyrj8kwk 2Y5nO2PfxlWgCo8UX6JiN+eRZdZ8yW8kt2voGCeVwBDDa7uPBnpLiK1H1XK4ydXh ZVerJqDwfRusTmnWC3lumw6yYUz+2IaG8qEp9aCOys4PpaR1zl7YbIToVIV02zo9 qYoH4FpDXRFraTOBndF8e15cH3v4Sxu/D5uTTz2upAOo5hz0tpQ9Mb0B+LoNCe/0 y5pHMESRnYCO0A2qjnftDREU3lumIFdwq9JqDEnDiPPjey8Afy+HwXoIqhdaDmZE 7uPRYt+FaDKzJcf9H/XdEMODAxaqJbiVzONfSLguN7y9aH/e4jHI2fR03NF852Bm L2r+gXVbptlDrx0ky9f6 =xRiH -----END PGP SIGNATURE-----