Security update for xen

Announcement ID:	SUSE-SU-2020:2790-1
Rating:	important
References:	bsc#1027519 bsc#1176339 bsc#1176341 bsc#1176343 bsc#1176344 bsc#1176345 bsc#1176346 bsc#1176347 bsc#1176348 bsc#1176349 bsc#1176350
Cross-References:	CVE-2020-25595 CVE-2020-25596 CVE-2020-25597 CVE-2020-25598 CVE-2020-25599 CVE-2020-25600 CVE-2020-25601 CVE-2020-25602 CVE-2020-25603 CVE-2020-25604
CVSS scores:	CVE-2020-25595 ( SUSE ): 7.8 CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H CVE-2020-25595 ( NVD ): 7.8 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H CVE-2020-25596 ( SUSE ): 5.5 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H CVE-2020-25596 ( NVD ): 5.5 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H CVE-2020-25597 ( SUSE ): 6.5 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H CVE-2020-25597 ( NVD ): 6.5 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H CVE-2020-25598 ( SUSE ): 6.5 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H CVE-2020-25598 ( NVD ): 5.5 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H CVE-2020-25599 ( SUSE ): 8.2 CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H CVE-2020-25599 ( NVD ): 7.0 CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H CVE-2020-25600 ( SUSE ): 7.1 CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H CVE-2020-25600 ( NVD ): 5.5 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H CVE-2020-25601 ( SUSE ): 6.5 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H CVE-2020-25601 ( NVD ): 5.5 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H CVE-2020-25602 ( SUSE ): 6.2 CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H CVE-2020-25602 ( NVD ): 6.0 CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:N/I:N/A:H CVE-2020-25603 ( SUSE ): 7.8 CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H CVE-2020-25603 ( NVD ): 7.8 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H CVE-2020-25604 ( SUSE ): 6.5 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H CVE-2020-25604 ( NVD ): 4.7 CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H
Affected Products:	Basesystem Module 15-SP1 Server Applications Module 15-SP1 SUSE Linux Enterprise Desktop 15 SP1 SUSE Linux Enterprise High Performance Computing 15 SP1 SUSE Linux Enterprise Real Time 15 SP1 SUSE Linux Enterprise Server 15 SP1 SUSE Linux Enterprise Server 15 SP1 Business Critical Linux 15-SP1 SUSE Linux Enterprise Server for SAP Applications 15 SP1 SUSE Manager Proxy 4.0 SUSE Manager Retail Branch Server 4.0 SUSE Manager Server 4.0

An update that solves 10 vulnerabilities and has one security fix can now be installed.

Description:

This update for xen fixes the following issues:

• CVE-2020-25602: Fixed an issue where there was a crash when handling guest access to MSR_MISC_ENABLE was thrown (bsc#1176339,XSA-333)
• CVE-2020-25598: Added a missing unlock in XENMEM_acquire_resource error path (bsc#1176341,XSA-334)
• CVE-2020-25604: Fixed a race condition when migrating timers between x86 HVM vCPU-s (bsc#1176343,XSA-336)
• CVE-2020-25595: Fixed an issue where PCI passthrough code was reading back hardware registers (bsc#1176344,XSA-337)
• CVE-2020-25597: Fixed an issue where a valid event channels may not turn invalid (bsc#1176346,XSA-338)
• CVE-2020-25596: Fixed a potential denial of service in x86 pv guest kernel via SYSENTER (bsc#1176345,XSA-339)
• CVE-2020-25603: Fixed an issue due to missing barriers when accessing/allocating an event channel (bsc#1176347,XSA-340)
• CVE-2020-25600: Fixed out of bounds event channels available to 32-bit x86 domains (bsc#1176348,XSA-342)
• CVE-2020-25599: Fixed race conditions with evtchn_reset() (bsc#1176349,XSA-343)

• CVE-2020-25601: Fixed an issue due to lack of preemption in evtchn_reset() / evtchn_destroy() (bsc#1176350,XSA-344)

• Various bug fixes (bsc#1027519)

Patch Instructions:

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

• Basesystem Module 15-SP1
  zypper in -t patch SUSE-SLE-Module-Basesystem-15-SP1-2020-2790=1
• Server Applications Module 15-SP1
  zypper in -t patch SUSE-SLE-Module-Server-Applications-15-SP1-2020-2790=1

Package List:

• Basesystem Module 15-SP1 (x86_64)
  • xen-tools-domU-4.12.3_08-3.28.1
  • xen-debugsource-4.12.3_08-3.28.1
  • xen-libs-4.12.3_08-3.28.1
  • xen-tools-domU-debuginfo-4.12.3_08-3.28.1
  • xen-libs-debuginfo-4.12.3_08-3.28.1
• Server Applications Module 15-SP1 (x86_64)
  • xen-tools-debuginfo-4.12.3_08-3.28.1
  • xen-tools-4.12.3_08-3.28.1
  • xen-devel-4.12.3_08-3.28.1
  • xen-4.12.3_08-3.28.1
  • xen-debugsource-4.12.3_08-3.28.1

References:

• https://www.suse.com/security/cve/CVE-2020-25595.html
• https://www.suse.com/security/cve/CVE-2020-25596.html
• https://www.suse.com/security/cve/CVE-2020-25597.html
• https://www.suse.com/security/cve/CVE-2020-25598.html
• https://www.suse.com/security/cve/CVE-2020-25599.html
• https://www.suse.com/security/cve/CVE-2020-25600.html
• https://www.suse.com/security/cve/CVE-2020-25601.html
• https://www.suse.com/security/cve/CVE-2020-25602.html
• https://www.suse.com/security/cve/CVE-2020-25603.html
• https://www.suse.com/security/cve/CVE-2020-25604.html
• https://bugzilla.suse.com/show_bug.cgi?id=1027519
• https://bugzilla.suse.com/show_bug.cgi?id=1176339
• https://bugzilla.suse.com/show_bug.cgi?id=1176341
• https://bugzilla.suse.com/show_bug.cgi?id=1176343
• https://bugzilla.suse.com/show_bug.cgi?id=1176344
• https://bugzilla.suse.com/show_bug.cgi?id=1176345
• https://bugzilla.suse.com/show_bug.cgi?id=1176346
• https://bugzilla.suse.com/show_bug.cgi?id=1176347
• https://bugzilla.suse.com/show_bug.cgi?id=1176348
• https://bugzilla.suse.com/show_bug.cgi?id=1176349
• https://bugzilla.suse.com/show_bug.cgi?id=1176350