Risk | Medium |
Patch available | YES |
Number of vulnerabilities | 1 |
CVE-ID | CVE-2020-27534 |
CWE-ID | CWE-22 |
Exploitation vector | Network |
Public exploit | N/A |
Vulnerable software Subscribe |
Docker Server applications / Virtualization software |
Vendor | Docker Inc. |
Security Bulletin
This security bulletin contains one medium risk vulnerability.
EUVDB-ID: #VU79751
Risk: Medium
CVSSv3.1: 4.6 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N/E:U/RL:O/RC:C]
CVE-ID: CVE-2020-27534
CWE-ID:
CWE-22 - Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
Exploit availability: No
DescriptionThe vulnerability allows a remote attacker to perform directory traversal attacks.
The vulnerability exists due to util/binfmt_misc/check.go calls os.OpenFile with a potentially unsafe qemu-check temporary pathname, constructed with an empty first argument in an ioutil.TempDir call. A remote attacker can send a specially crafted HTTP request and read arbitrary files on the system.
MitigationInstall updates from vendor's website.
Vulnerable software versionsDocker: 19.03.0 - 19.03.8
External linkshttp://web.archive.org/web/20200530054359/
http://docs.docker.com/engine/release-notes/
http://github.com/moby/buildkit/pull/1462
http://github.com/moby/moby/pull/40877
http://golang.org/pkg/io/ioutil/#TempDir
http://golang.org/pkg/os/#TempDir
Q & A
Can this vulnerability be exploited remotely?
Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.
Is there known malware, which exploits this vulnerability?
No. We are not aware of malware exploiting this vulnerability.