File _patchinfo of Package patchinfo.3678

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File _patchinfo of Package patchinfo.3678

<patchinfo incident="3678">
  <issue id="1000106" tracker="bnc">VUL-0: CVE-2016-7777: xen: CR0.TS and CR0.EM not always honored for x86 HVM guests (XSA-190)</issue>
  <issue id="1003032" tracker="bnc">VUL-0: CVE-2016-7909: xen: net: pcnet: infinite loop in pcnet_rdra_addr</issue>
  <issue id="1003030" tracker="bnc">VUL-0: CVE-2016-7908: xen: net: Infinite loop in mcf_fec_do_tx</issue>
  <issue id="1009109" tracker="bnc">VUL-0: CVE-2016-9381: XSA-197: xen: qemu incautious about shared ring processing</issue>
  <issue id="1004981" tracker="bnc">Xen RPM doesn't contain debug hypervisor for EFI systems</issue>
  <issue id="1007941" tracker="bnc">Xen tools limit the number of vcpus to 256 when the system has 384</issue>
  <issue id="1009108" tracker="bnc">VUL-0: CVE-2016-9377,CVE-2016-9378: XSA-196: xen: x86 software interrupt injection mis-handled</issue>
  <issue id="1009100" tracker="bnc">VUL-0: CVE-2016-9386: XSA-191: xen: x86 null segments not always treated as unusable</issue>
  <issue id="1011652" tracker="bnc">VUL-0: EMBARGOED: CVE-2016-9637: xen: qemu ioport array overflow (XSA-199)</issue>
  <issue id="1005005" tracker="bnc">VUL-0: CVE-2016-8669: xen: char: divide by zero error in serial_update_parameters</issue>
  <issue id="1005004" tracker="bnc">CVE-2016-8667: xen: dma: rc4030 divide by zero error in set_next_tick</issue>
  <issue id="1009111" tracker="bnc">VUL-0: CVE-2016-9379,CVE-2016-9380: XSA-198: xen: delimiter injection vulnerabilities in pygrub</issue>
  <issue id="1009103" tracker="bnc">VUL-0: CVE-2016-9382: XSA-192: xen: x86 task switch to VM86 mode mis-handled</issue>
  <issue id="1009104" tracker="bnc">VUL-0: CVE-2016-9385: XSA-193: xen: x86 segment base write emulation lacking canonical address checks</issue>
  <issue id="1009105" tracker="bnc">VUL-0: CVE-2016-9384: XSA-194: xen: guest 32-bit ELF symbol table load leaking host data</issue>
  <issue id="1007157" tracker="bnc">VUL-0: CVE-2016-8910: xen: net: rtl8139: infinite loop while transmit in C+ mode</issue>
  <issue id="1009107" tracker="bnc">VUL-0: CVE-2016-9383: XSA-195: xen: x86 64-bit bit test instruction emulation broken</issue>
  <issue id="2016-9637" tracker="cve" />
  <issue id="2016-8910" tracker="cve" />
  <issue id="2016-9378" tracker="cve" />
  <issue id="2016-9379" tracker="cve" />
  <issue id="2016-8667" tracker="cve" />
  <issue id="2016-7909" tracker="cve" />
  <issue id="2016-7908" tracker="cve" />
  <issue id="2016-7777" tracker="cve" />
  <issue id="2016-9377" tracker="cve" />
  <issue id="2016-8669" tracker="cve" />
  <issue id="2016-9381" tracker="cve" />
  <issue id="2016-9380" tracker="cve" />
  <issue id="2016-9383" tracker="cve" />
  <issue id="2016-9382" tracker="cve" />
  <issue id="2016-9385" tracker="cve" />
  <issue id="2016-9384" tracker="cve" />
  <issue id="2016-9386" tracker="cve" />
  <category>security</category>
  <rating>important</rating>
  <packager>charlesa</packager>
  <description>
xen was updated to version 4.7.1 to fix 17 security issues.

These security issues were fixed:

- CVE-2016-9637: ioport array overflow allowing a malicious guest administrator can escalate their privilege to that of the host (bsc#1011652).
- CVE-2016-9386: x86 null segments were not always treated as unusable allowing an unprivileged guest user program to elevate its privilege to that of the guest operating system. Exploit of this vulnerability is easy on Intel and more complicated on AMD (bsc#1009100).
- CVE-2016-9382: x86 task switch to VM86 mode was mis-handled, allowing a unprivileged guest process to escalate its privilege to that of the guest operating system on AMD hardware. On Intel hardware a malicious unprivileged guest process can crash the guest (bsc#1009103).
- CVE-2016-9385: x86 segment base write emulation lacked canonical address checks, allowing a malicious guest administrator to crash the host (bsc#1009104).
- CVE-2016-9384: Guest 32-bit ELF symbol table load leaking host data to unprivileged guest users (bsc#1009105).
- CVE-2016-9383: The x86 64-bit bit test instruction emulation was broken, allowing a guest to modify arbitrary memory leading to arbitray code execution (bsc#1009107).
- CVE-2016-9377: x86 software interrupt injection was mis-handled, allowing an unprivileged guest user to crash the guest (bsc#1009108).
- CVE-2016-9378: x86 software interrupt injection was mis-handled, allowing an unprivileged guest user to crash the guest (bsc#1009108)
- CVE-2016-9381: Improper processing of shared rings allowing guest administrators take over the qemu process, elevating their privilege to that of the qemu process (bsc#1009109).
- CVE-2016-9379: Delimiter injection vulnerabilities in pygrub allowed guest administrators to obtain the contents of sensitive host files or delete the files (bsc#1009111).
- CVE-2016-9380: Delimiter injection vulnerabilities in pygrub allowed  guest administrators to obtain the contents of sensitive host files or delete the files  (bsc#1009111).
- CVE-2016-7777: Xen did not properly honor CR0.TS and CR0.EM, which allowed local x86 HVM guest OS users to read or modify FPU, MMX, or XMM register state information belonging to arbitrary tasks on the guest by modifying an instruction while the hypervisor is preparing to emulate it (bsc#1000106).
- CVE-2016-8910: The rtl8139_cplus_transmit function in hw/net/rtl8139.c allowed local guest OS administrators to cause a denial of service (infinite loop and CPU consumption) by leveraging failure to limit the ring descriptor count (bsc#1007157).
- CVE-2016-8667: The rc4030_write function in hw/dma/rc4030.c in allowed local guest OS administrators to cause a denial of service (divide-by-zero error and QEMU process crash) via a large interval timer reload value (bsc#1005004).
- CVE-2016-8669: The serial_update_parameters function in hw/char/serial.c allowed local guest OS administrators to cause a denial of service (divide-by-zero error and QEMU process crash) via vectors involving a value of divider greater than baud base (bsc#1005005).
- CVE-2016-7908: The mcf_fec_do_tx function in hw/net/mcf_fec.c did not properly limit the buffer descriptor count when transmitting packets, which allowed local guest OS administrators to cause a denial of service (infinite loop and QEMU process crash) via vectors involving a buffer descriptor with a length of 0 and crafted values in bd.flags (bsc#1003030).
- CVE-2016-7909: The pcnet_rdra_addr function in hw/net/pcnet.c allowed local guest OS administrators to cause a denial of service (infinite loop and QEMU process crash) by setting the (1) receive or (2) transmit descriptor ring length to 0 (bsc#1003032).

These non-security issues were fixed:

- bsc#1004981: Xen RPM didn't contain debug hypervisor for EFI systems
- bsc#1007941: Xen tools limited the number of vcpus to 256 
</description>
  <summary>Security update for xen</summary>
</patchinfo>

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