Race condition in xen (Alpine package)
| Risk | Low |
| Patch available | YES |
| Number of vulnerabilities | 1 |
| CVE-ID | CVE-2020-27672 |
| CWE-ID | CWE-362 |
| Exploitation vector | Local |
| Public exploit | N/A |
| Vulnerable software Subscribe |
xen (Alpine package) Operating systems & Components / Operating system package or component |
| Vendor | Alpine Linux Development Team |
Security Bulletin
This security bulletin contains one low risk vulnerability.
1) Race condition
EUVDB-ID: #VU49941
Risk: Low
CVSSv3.1: 6.1 [CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]
CVE-ID: CVE-2020-27672
Exploit availability: No
DescriptionThe vulnerability allows a local authenticated user to execute arbitrary code.
An issue was discovered in Xen through 4.14.x allowing x86 guest OS users to cause a host OS denial of service, achieve data corruption, or possibly gain privileges by exploiting a race condition that leads to a use-after-free involving 2MiB and 1GiB superpages.
MitigationInstall update from vendor's website.
Vulnerable software versionsxen (Alpine package): 4.1.3-r0 - 4.13.2-r4
External linkshttp://git.alpinelinux.org/aports/commit/?id=b7415ec9fb42dde32333fbc1e4575f6bcf11cb32
http://git.alpinelinux.org/aports/commit/?id=7c351cb852f0cee887b3fcb3a76be20f51350a1a
http://git.alpinelinux.org/aports/commit/?id=b47f6b6f2e6b179714227cc362a24b0bdb78a028
http://git.alpinelinux.org/aports/commit/?id=7335a7d4162b6694682183dfea682f282843d5f3
http://git.alpinelinux.org/aports/commit/?id=91c8694f2fdbc9ff757dc2f658107b9a87428d10
Q & A
Can this vulnerability be exploited remotely?
No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.
Is there known malware, which exploits this vulnerability?
No. We are not aware of malware exploiting this vulnerability.
