SB2020071103 - Resource management error in xen (Alpine package)
Published: July 11, 2020
Security Bulletin ID
SB2020071103
Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Adjecent network
Highest impact
Denial of service
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 security vulnerability.
1) Resource management error (CVE-ID: CVE-2020-15564)
The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.
The vulnerability exists due to missing alignment check in VCPUOP_register_vcpu_info hypercall in Xen. A attacker with privileged access to guest operating system can crash the hypervisor.
Note: the vulnerability affects Arm systems only.
Remediation
Install update from vendor's website.
References
- https://git.alpinelinux.org/aports/commit/?id=3992359a2b257143f6d354a15e0d3b338c5d8e45
- https://git.alpinelinux.org/aports/commit/?id=4eb93417705cbc9cb434bae5e88502bf944f7652
- https://git.alpinelinux.org/aports/commit/?id=054ec5f5456be1d95d13e7b5c5607e9c0ed5904d
- https://git.alpinelinux.org/aports/commit/?id=a95c3541d2bc3ba65df7c81a62b776d2fd0ed4ce
- https://git.alpinelinux.org/aports/commit/?id=fc28a340a4fd7b262e11f636ab2fafe24e2d05a2