Incorrect default permissions in Zstandard - #VU50676
Published: February 14, 2021 / Updated: March 4, 2021
Vulnerability identifier: #VU50676
CSH Severity: Low
CVSS v4: 4.8 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N]
CVE-ID: N/A
CWE-ID: CWE-276
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a local user to escalate privileges on the system.
The vulnerability exists due to zstd temporarily
exposes a world-readable version of its input even if the original
file had restrictive permissions. A local user with access to the system can gain access to sensitive information.
Affected software
Zstandard
libzstd (Debian package)
libzstd (Debian package)
Remediation
Install update from vendor's website.
Zstandard - update to 1.4.9
libzstd (Debian package) - update to 1.3.8+dfsg-3+deb10u1
libzstd (Debian package) - update to 1.3.8+dfsg-3+deb10u1