Race condition in xen (Alpine package)
| Risk | Medium |
| Patch available | YES |
| Number of vulnerabilities | 1 |
| CVE-ID | CVE-2019-18421 |
| CWE-ID | CWE-362 |
| Exploitation vector | Local network |
| 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 medium risk vulnerability.
1) Race condition
EUVDB-ID: #VU22539
Risk: Medium
CVSSv3.1: 6.6 [CVSS:3.1/AV:A/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:H/E:U/RL:O/RC:C]
CVE-ID: CVE-2019-18421
Exploit availability: No
DescriptionThe vulnerability allows a remote user to escalate privileges on the system.
The vulnerability exists due to a race condition when handling restartable PV type change operations. A remote administrator of a guest operating system can exploit the race and gain unauthorized access to sensitive information and escalate privileges on the system.
MitigationInstall update from vendor's website.
Vulnerable software versionsxen (Alpine package): 4.8.2-r0 - 4.10.4-r0
External linkshttp://git.alpinelinux.org/aports/commit/?id=e42bcd9d2c39e861c980adebf91418ddbe72bd21
http://git.alpinelinux.org/aports/commit/?id=c49084a961893d69e5cdba0b5a8072217ba8be67
http://git.alpinelinux.org/aports/commit/?id=b56efe8db5679b569767cee09b45ce5cd04b942d
http://git.alpinelinux.org/aports/commit/?id=7704a01fec21129dc2f13feb032fb39d8b6a9cb2
http://git.alpinelinux.org/aports/commit/?id=168f974f4f9941c940b1b4a27d1167175018ad92
http://git.alpinelinux.org/aports/commit/?id=1a7ae75cb9ed94f62f9859f8a07a0bc1c5021604
http://git.alpinelinux.org/aports/commit/?id=d9cf7666f5f3aa90dbce9f04bdc7d975284cc530
Q & A
Can this vulnerability be exploited remotely?
Yes. This vulnerability can be exploited by a remote authenticated privileged user via the local network (LAN).
Is there known malware, which exploits this vulnerability?
No. We are not aware of malware exploiting this vulnerability.
