Buffer overflow in Screen - CVE-2020-9366
Published: April 1, 2020
Vulnerability identifier: #VU26504
CSH Severity: Medium
CVSS v4: 6.9 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N]
CVE-ID: CVE-2020-9366
CWE-ID: CWE-119
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to execute arbitrary code on the target system.
The vulnerability exists due to a boundary error when treating the special escape OSC 49. A remote attacker can use a specially crafted output or a special program, trigger memory corruption and execute arbitrary code on the target system.
Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.
Affected software
Screen
Gentoo Linux
screen (Alpine package)
Gentoo Linux
screen (Alpine package)
How to mitigate CVE-2020-9366
Install updates from vendor's website.
Screen - update to 4.8.0
screen (Alpine package) - update to 4.6.2-r1
screen (Alpine package) - update to 4.6.2-r1