Buffer overflow in Tor - CVE-2020-15572
Published: July 15, 2020 / Updated: August 8, 2020
Vulnerability identifier: #VU34151
CSH Severity: Medium
CVSS v4: 8.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2020-15572
CWE-ID: CWE-119
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote non-authenticated attacker to perform a denial of service (DoS) attack.
Tor before 0.4.3.6 has an out-of-bounds memory access that allows a remote denial-of-service (crash) attack against Tor instances built to use Mozilla Network Security Services (NSS), aka TROVE-2020-001.
Affected software
Tor
Fedora
tor
Fedora
tor
How to mitigate CVE-2020-15572
Install update from vendor's website.
tor - addressed in versions 0.4.3.6-1.el8, 0.4.3.6-1.fc31, 0.4.3.6-1.fc32