Improper Privilege Management in xen (Alpine package)



Risk Medium
Patch available YES
Number of vulnerabilities 1
CVE-ID CVE-2020-27671
CWE-ID CWE-269
Exploitation vector Local network
Public exploit N/A
Vulnerable software
 xen (Alpine package)
Operating systems & Components / Operating system package or component

Vendor Alpine Linux Development Team

Security Bulletin

This security bulletin contains one medium risk vulnerability.

1) Improper Privilege Management

EUVDB-ID: #VU48638

Risk: Medium

CVSSv4.0: 4.8 [CVSS:4.0/AV:A/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2020-27671

CWE-ID: CWE-269 - Improper Privilege Management

Exploit availability: No

Description

The vulnerability allows a local user to escalate privileges.

The vulnerability exists due to improper privilege management within the IOMMU TLB implementation. A local user on a guest OS can escalate privileges on the system by running a specially crafted application.

Mitigation

Install update from vendor's website.

Vulnerable software versions

xen (Alpine package): 4.11.2-r0 - 4.13.2-r4

CPE2.3 External links

https://git.alpinelinux.org/aports/commit/?id=b7415ec9fb42dde32333fbc1e4575f6bcf11cb32
https://git.alpinelinux.org/aports/commit/?id=7c351cb852f0cee887b3fcb3a76be20f51350a1a
https://git.alpinelinux.org/aports/commit/?id=b47f6b6f2e6b179714227cc362a24b0bdb78a028
https://git.alpinelinux.org/aports/commit/?id=7335a7d4162b6694682183dfea682f282843d5f3
https://git.alpinelinux.org/aports/commit/?id=91c8694f2fdbc9ff757dc2f658107b9a87428d10


Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote authenticated user via the local network (LAN).

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.



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