#VU50842 Improper Neutralization of Argument Delimiters in a Command in Screen
Vulnerability identifier: #VU50842
Vulnerability risk: High
CVSSv3.1: 7.7 [CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]
CVE-ID:
CWE-ID:
CWE-88
Exploitation vector: Network
Exploit availability: No
Vulnerable software:
Screen
Other software /
Other software solutions
Vendor: GNU
Description
The vulnerability allows a remote attacker to compromise the affected system.
The vulnerability exists due to incorrect processing of user-supplied data in the encoding.c file. A remote attacker can pass specially crafted UTF-8 character sequence to the GNU Screen application and perform a denial of service attack or execute arbitrary code on the system.
Mitigation
Install updates from vendor's website.
Vulnerable software versions
Screen: 4.0.1 - 4.8.0
External links
http://www.openwall.com/lists/oss-security/2021/02/09/8
http://lists.debian.org/debian-lts-announce/2021/02/msg00031.html
http://lists.gnu.org/archive/html/screen-devel/2021-02/msg00000.html
http://www.openwall.com/lists/oss-security/2021/02/09/3
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.
