Path traversal in Docker - CVE-2020-27534
Published: August 21, 2023
Vulnerability identifier: #VU79751
CSH Severity: Medium
CVSSv4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Green
CVE-ID: CVE-2020-27534
CWE-ID: CWE-22
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerable software:
Docker
Docker
Software vendor:
Docker Inc.
Docker Inc.
Description
The 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.
Remediation
Install updates from vendor's website.