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HistorySep 08, 2017 - 9:08 p.m.

Security update for xen (important)






This update for xen fixes several issues.

These security issues were fixed:

  • CVE-2017-12135: Unbounded recursion in grant table code allowed a
    malicious guest to crash the host or potentially escalate
    privileges/leak information (XSA-226, bsc#1051787).
  • CVE-2017-12137: Incorrectly-aligned updates to pagetables allowed for
    privilege escalation (XSA-227, bsc#1051788).
  • CVE-2017-12136: Race conditions with maptrack free list handling allows
    a malicious guest administrator to crash the host or escalate their
    privilege to that of the host (XSA-228, bsc#1051789).
  • CVE-2017-11434: The dhcp_decode function in slirp/bootp.c allowed local
    guest OS users to cause a denial of service (out-of-bounds read) via a
    crafted DHCP
    options string (bsc#1049578).
  • CVE-2017-10664: qemu-nbd did not ignore SIGPIPE, which allowed remote
    attackers to cause a denial of service (daemon crash) by disconnecting
    during a server-to-client reply attempt (bsc#1046637).
  • CVE-2017-12855: Premature clearing of GTF_writing / GTF_reading lead to
    potentially leaking sensitive information (XSA-230 bsc#1052686.

These non-security issues were fixed:

  • bsc#1055695: XEN: 11SP4 and 12SP3 HVM guests can not be restored after
    the save using xl stack
  • bsc#1035231: Migration of HVM domU did not use superpages on destination
  • bsc#1002573: Optimized LVM functions in block-dmmd block-dmmd

This update was imported from the SUSE:SLE-12-SP3:Update update project.