Race condition in xen (Alpine package)
| Risk | Medium |
| Patch available | YES |
| Number of vulnerabilities | 1 |
| CVE-ID | CVE-2020-25604 |
| CWE-ID | CWE-362 |
| Exploitation vector | 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) Race condition
EUVDB-ID: #VU46970
Risk: Medium
CVSSv4.0: 5.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:H/E:U/U:Green]
CVE-ID: CVE-2020-25604
Exploit availability: No
DescriptionThe vulnerability allows a remote user to perform a denial of service (Dos) attack.
The vulnerability exists due to a race condition when migrating timers between x86 HVM vCPU-s in Xen. A remote user on a guest operating system can run a specially crafted program to crash the hypervisor.
Install update from vendor's website.
Vulnerable software versionsxen (Alpine package): 4.10.1-r0 - 4.14.0-r0
CPE2.3- cpe:2.3:o:alpine:xen_alpine_package:4.10.1-r0:*:*:*:*:alpine_linux:*:3.7
- cpe:2.3:o:alpine:xen_alpine_package:4.10.1-r1:*:*:*:*:alpine_linux:*:3.7
- cpe:2.3:o:alpine:xen_alpine_package:4.10.1-r2:*:*:*:*:alpine_linux:*:3.7
https://git.alpinelinux.org/aports/commit/?id=f48590ae54ca9e0c3bf6b3fae3e6b065f14223e3
Q & A
Can this vulnerability be exploited remotely?
Yes. This vulnerability can be exploited by a remote authenticated user via the Internet.
Is there known malware, which exploits this vulnerability?
No. We are not aware of malware exploiting this vulnerability.
