Debian DSA-4369-1 : xen - security update

High Nessus Plugin ID 121168

New! Vulnerability Priority Rating (VPR)

Tenable calculates a dynamic VPR for every vulnerability. VPR combines vulnerability information with threat intelligence and machine learning algorithms to predict which vulnerabilities are most likely to be exploited in attacks. Read more about what VPR is and how it's different from CVSS.

VPR Score: 7.3

Synopsis

The remote Debian host is missing a security-related update.

Description

Multiple vulnerabilities have been discovered in the Xen hypervisor :

- CVE-2018-19961 / CVE-2018-19962 Paul Durrant discovered that incorrect TLB handling could result in denial of service, privilege escalation or information leaks.

- CVE-2018-19965 Matthew Daley discovered that incorrect handling of the INVPCID instruction could result in denial of service by PV guests.

- CVE-2018-19966 It was discovered that a regression in the fix to address CVE-2017-15595 could result in denial of service, privilege escalation or information leaks by a PV guest.

- CVE-2018-19967 It was discovered that an error in some Intel CPUs could result in denial of service by a guest instance.

Solution

Upgrade the xen packages.

For the stable distribution (stretch), these problems have been fixed in version 4.8.5+shim4.10.2+xsa282-1+deb9u11.

Debian DSA-4369-1 : xen - security update

High Nessus Plugin ID 121168

New! Vulnerability Priority Rating (VPR)

Synopsis

Description

Solution

See Also

Plugin Details

Risk Information

CVSS v2.0

CVSS v3.0

Vulnerability Information

Reference Information