Security update for xen

SUSE Security Update: Security update for xen
Announcement ID: SUSE-SU-2019:0827-1
Rating: important
References: #1027519 #1056336 #1105528 #1108940 #1110924 #1111007 #1111011 #1111014 #1112188 #1114423 #1114988 #1115040 #1115045 #1115047 #1117756 #1123157 #1126140 #1126141 #1126192 #1126195 #1126196 #1126198 #1126201 #1127400 #1129623
Cross-References: CVE-2017-13672 CVE-2018-10839 CVE-2018-17958 CVE-2018-17962 CVE-2018-17963 CVE-2018-18438 CVE-2018-18849 CVE-2018-19665 CVE-2018-19961 CVE-2018-19962 CVE-2018-19965 CVE-2018-19966 CVE-2018-19967 CVE-2019-6778 CVE-2019-9824
Affected Products:
  • SUSE Linux Enterprise Server 12-LTSS

An update that solves 15 vulnerabilities and has 10 fixes is now available.

Description:

This update for xen fixes the following issues:
Security issues fixed:

  • CVE-2019-6778: Fixed a heap buffer overflow in tcp_emu() found in slirp (bsc#1123157).
  • CVE-2017-13672: Fixed an out of bounds read access during display update (bsc#1056336).
  • Fixed an issue which could allow malicious or buggy guests with passed through PCI devices to be able to escalate their privileges, crash the host, or access data belonging to other guests. Additionally memory leaks were also possible (bsc#1126140)
  • Fixed a race condition issue which could allow malicious PV guests to escalate their privilege to that of the hypervisor (bsc#1126141).
  • CVE-2018-18849: Fixed an out of bounds msg buffer access which could lead to denial of service (bsc#1114423).
  • Fixed an issue which could allow a malicious unprivileged guest userspace process to escalate its privilege to that of other userspace processes in the same guest and potentially thereby to that of the guest operating system (bsc#1126201).
  • CVE-2018-17958: Fixed an integer overflow leading to a buffer overflow in the rtl8139 component (bsc#1111007)
  • CVE-2018-19967: Fixed HLE constructs that allowed guests to lock up the host, resulting in a Denial of Service (DoS). (XSA-282) (bsc#1114988)
  • CVE-2018-19665: Fixed an integer overflow resulting in memory corruption in various Bluetooth functions, allowing this to crash qemu process resulting in Denial of Service (DoS). (bsc#1117756).
  • CVE-2019-9824: Fixed an information leak in SLiRP networking implementation which could allow a user/process to read uninitialised stack memory contents (bsc#1129623).
  • CVE-2018-19961, CVE-2018-19962: Fixed an issue related to insufficient TLB flushing with AMD IOMMUs, which potentially allowed a guest to escalate its privileges, may cause a Denial of Service (DoS) affecting the entire host, or may be able to access data it is not supposed to access. (XSA-275) (bsc#1115040)
  • CVE-2018-19966: Fixed an issue related to a previous fix for XSA-240, which conflicted with shadow paging and allowed a guest to cause Xen to crash, resulting in a Denial of Service (DoS) (XSA-280) (bsc#1115047).
  • CVE-2018-10839: Fixed an integer overflow leading to a buffer overflow in the ne2000 component (bsc#1110924).
  • CVE-2018-19965: Fixed an issue related to the INVPCID instruction in case non-canonical addresses are accessed, which may allow a guest to cause Xen to crash, resulting in a Denial of Service (DoS) affecting the entire host. (XSA-279) (bsc#1115045).
  • Fixed an issue which could allow malicious 64bit PV guests to cause a host crash (bsc#1127400).
  • Fixed an issue which could allow malicious PV guests may cause a host crash or gain access to data pertaining to other guests.Additionally, vulnerable configurations are likely to be unstable even in the absence of an attack (bsc#1126198).
  • Fixed multiple access violations introduced by XENMEM_exchange hypercall which could allow a single PV guest to leak arbitrary amounts of memory, leading to a denial of service (bsc#1126192).
  • CVE-2018-17963: Fixed an integer overflow in relation to large packet sizes, leading to a denial of service (DoS). (bsc#1111014).
  • Fixed an issue which could allow a malicious or buggy x86 PV guest kernels can mount a Denial of Service attack affecting the whole system (bsc#1126196).
  • Fixed an issue which could allow an untrusted PV domain with access to a physical device to DMA into its own pagetables leading to privilege escalation (bsc#1126195).
  • CVE-2018-17962: Fixed an integer overflow leading to a buffer overflow in the pcnet component (bsc#1111011)
  • CVE-2018-18438: Fixed an integer overflow in ccid_card_vscard_read function which could lead to memory corruption (bsc#1112188).

Other issues fixed:
  • Upstream bug fixes (bsc#1027519)
  • Fixed an issue where XEN SLE12-SP1 domU hangs on SLE12-SP3 HV1108940 (bsc#1108940).

Patch Instructions:

To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or "zypper patch".
Alternatively you can run the command listed for your product:

  • SUSE Linux Enterprise Server 12-LTSS:
    zypper in -t patch SUSE-SLE-SERVER-12-2019-827=1

Package List:

  • SUSE Linux Enterprise Server 12-LTSS (x86_64):
    • xen-4.4.4_40-22.77.1
    • xen-debugsource-4.4.4_40-22.77.1
    • xen-doc-html-4.4.4_40-22.77.1
    • xen-kmp-default-4.4.4_40_k3.12.61_52.146-22.77.1
    • xen-kmp-default-debuginfo-4.4.4_40_k3.12.61_52.146-22.77.1
    • xen-libs-32bit-4.4.4_40-22.77.1
    • xen-libs-4.4.4_40-22.77.1
    • xen-libs-debuginfo-32bit-4.4.4_40-22.77.1
    • xen-libs-debuginfo-4.4.4_40-22.77.1
    • xen-tools-4.4.4_40-22.77.1
    • xen-tools-debuginfo-4.4.4_40-22.77.1
    • xen-tools-domU-4.4.4_40-22.77.1
    • xen-tools-domU-debuginfo-4.4.4_40-22.77.1

References: