CVE-2021-26937

encoding.c in GNU Screen through 4.8.0 allows remote attackers to cause a denial of service (invalid write access and application crash) or possibly have unspecified other impact via a crafted UTF-8 character sequence.

CVSS v3.0 9.8 CRITICAL
CVSS v2.0 7.5 HIGH

9.8^/10

CVSS v3.0 : CRITICAL

V3 Legend

Vector :

Exploitability : 3.9 / Impact : 5.9

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

7.5^/10

CVSS v2.0 : HIGH

V2 Legend

Vector : AV:N/AC:L/Au:N/C:P/I:P/A:P

Exploitability : 10.0 / Impact : 6.4

Access Vector NETWORK

Access Complexity LOW

Authentication NONE

Confidentiality Impact PARTIAL

Integrity Impact PARTIAL

Availability Impact PARTIAL

References

Link	Resource
https://www.openwall.com/lists/oss-security/2021/02/09/3	Exploit Mailing List Third Party Advisory
https://ftp.gnu.org/gnu/screen/	Product
https://lists.gnu.org/archive/html/screen-devel/2021-02/msg00000.html	Exploit Mailing List Vendor Advisory
http://www.openwall.com/lists/oss-security/2021/02/09/8	Exploit Mailing List Third Party Advisory
https://lists.debian.org/debian-lts-announce/2021/02/msg00031.html	Mailing List Third Party Advisory
https://www.debian.org/security/2021/dsa-4861	Third Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/JJWLXP45POUUYBJRRWPVAWNZDJTLYWVM/	Mailing List Third Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/GNWBOIDEPOEQS5RMQVMFKHKXJCGNYWBL/	Mailing List Third Party Advisory
https://security.gentoo.org/glsa/202105-11	Third Party Advisory

Configurations

Configuration 1 (hide)

cpe:2.3:a:gnu:screen:*:*:*:*:*:*:*:*

Configuration 2 (hide)

OR	cpe:2.3:o:debian:debian_linux:9.0:::::::*
	cpe:2.3:o:debian:debian_linux:10.0:::::::*

Configuration 3 (hide)

OR	cpe:2.3:o:fedoraproject:fedora:32:::::::*
	cpe:2.3:o:fedoraproject:fedora:33:::::::*

Information

Published : 2021-02-09 12:15

Updated : 2022-05-06 13:59

NVD link : CVE-2021-26937

Mitre link : CVE-2021-26937

JSON object : View

CWE

CWE-88

Improper Neutralization of Argument Delimiters in a Command ('Argument Injection')

Products Affected

debian

debian_linux

gnu

screen

fedoraproject

fedora

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9.8 /10