9.8 High
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
7.5 High
CVSS2
Access Vector
NETWORK
Access Complexity
LOW
Authentication
NONE
Confidentiality Impact
PARTIAL
Integrity Impact
PARTIAL
Availability Impact
PARTIAL
AV:N/AC:L/Au:N/C:P/I:P/A:P
0.015 Low
EPSS
Percentile
86.5%
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.
Author | Note |
---|---|
mdeslaur | as of 2021-02-18, proposed patch on mailing list not yet commited to upstream repo, but has been released by Debian |
OS | Version | Architecture | Package | Version | Filename |
---|---|---|---|---|---|
ubuntu | 18.04 | noarch | screen | < 4.6.2-1ubuntu1.1 | UNKNOWN |
ubuntu | 20.04 | noarch | screen | < 4.8.0-1ubuntu0.1 | UNKNOWN |
ubuntu | 20.10 | noarch | screen | < 4.8.0-2ubuntu0.1 | UNKNOWN |
ubuntu | 14.04 | noarch | screen | < 4.1.0~20120320gitdb59704-9ubuntu0.1~esm2) Available with Ubuntu Pro or Ubuntu Pro (Infra-only | UNKNOWN |
ubuntu | 16.04 | noarch | screen | < 4.3.1-2ubuntu0.1 | UNKNOWN |
launchpad.net/bugs/cve/CVE-2021-26937
lists.gnu.org/archive/html/screen-devel/2021-02/msg00000.html
nvd.nist.gov/vuln/detail/CVE-2021-26937
seclists.org/oss-sec/2021/q1/124
seclists.org/oss-sec/2021/q1/129
security-tracker.debian.org/tracker/CVE-2021-26937
ubuntu.com/security/notices/USN-4747-1
ubuntu.com/security/notices/USN-4747-2
www.cve.org/CVERecord?id=CVE-2021-26937
9.8 High
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
7.5 High
CVSS2
Access Vector
NETWORK
Access Complexity
LOW
Authentication
NONE
Confidentiality Impact
PARTIAL
Integrity Impact
PARTIAL
Availability Impact
PARTIAL
AV:N/AC:L/Au:N/C:P/I:P/A:P
0.015 Low
EPSS
Percentile
86.5%