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amazonAmazonALAS2-2021-1623
HistoryMar 25, 2021 - 6:31 p.m.

Important: screen

2021-03-2518:31:00
alas.aws.amazon.com
38

CVSS2

7.5

Attack Vector

NETWORK

Attack 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

CVSS3

9.8

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

AI Score

9.8

Confidence

High

EPSS

0.015

Percentile

86.7%

JSON

Issue Overview:

A flaw was found in screen. A specially crafted sequence of combining characters could cause an out of bounds write leading to arbitrary code execution. The highest threat from this vulnerability is to data confidentiality and integrity as well as system availability. (CVE-2021-26937)

Affected Packages:

screen

Note:

This advisory is applicable to Amazon Linux 2 (AL2) Core repository. Visit this FAQ section for the difference between AL2 Core and AL2 Extras advisories.

Issue Correction:
Run yum update screen to update your system.

New Packages:

aarch64:  
    screen-4.1.0-0.27.20120314git3c2946.amzn2.aarch64  
    screen-debuginfo-4.1.0-0.27.20120314git3c2946.amzn2.aarch64  
  
i686:  
    screen-4.1.0-0.27.20120314git3c2946.amzn2.i686  
    screen-debuginfo-4.1.0-0.27.20120314git3c2946.amzn2.i686  
  
src:  
    screen-4.1.0-0.27.20120314git3c2946.amzn2.src  
  
x86_64:  
    screen-4.1.0-0.27.20120314git3c2946.amzn2.x86_64  
    screen-debuginfo-4.1.0-0.27.20120314git3c2946.amzn2.x86_64

Additional References

Red Hat: CVE-2021-26937

Mitre: CVE-2021-26937

Related

osv 5
openvas 19
fedora 2
debian 3
nessus 36
mageia 1
centos 1
ubuntu 2
oraclelinux 1
suse 1
ubuntucve 1
cbl_mariner 1
alpinelinux 1
cvelist 1
redhatcve 1
cloudlinux 1
debiancve 1
redhat 2
prion 1
veracode 1
gentoo 1
cve 1
amazon 1
nvd 1
rosalinux 1
osv
osv
screen - security update
2021-02-20 00:00:00
CVE-2021-26937
2021-02-09 20:15:14
screen - security update
2021-02-21 00:00:00
openvas
openvas
Huawei EulerOS: Security Advisory for screen (EulerOS-SA-2021-1888)
2021-05-19 00:00:00
Debian: Security Advisory (DSA-4861-1)
2021-02-23 00:00:00
Fedora: Security Advisory for screen (FEDORA-2021-5e9894a0c5)
2021-03-04 00:00:00
fedora
fedora
[SECURITY] Fedora 33 Update: screen-4.8.0-5.fc33
2021-03-04 20:11:36
[SECURITY] Fedora 32 Update: screen-4.8.0-5.fc32
2021-03-03 23:27:25
debian
debian
[SECURITY] [DSA 4861-1] screen security update
2021-02-21 08:31:22
[SECURITY] [DSA 4861-1] screen security update
2021-02-21 08:31:22
[SECURITY] [DLA 2570-1] screen security update
2021-02-19 18:34:16
nessus
nessus
Amazon Linux 2 : screen (ALAS-2021-1623)
2021-03-27 00:00:00
EulerOS 2.0 SP8 : screen (EulerOS-SA-2021-1888)
2021-05-18 00:00:00
Fedora 33 : screen (2021-9107eeb95c)
2021-03-05 00:00:00
mageia
mageia
Updated screen packages fix security vulnerability
2021-03-04 19:53:32
centos
centos
screen security update
2021-04-14 13:29:09
ubuntu
ubuntu
GNU Screen vulnerability
2021-02-24 00:00:00
GNU Screen vulnerability
2021-02-24 00:00:00
oraclelinux
oraclelinux
screen security update
2021-03-09 00:00:00
suse
suse
Security update for screen (important)
2021-02-18 00:00:00
ubuntucve
ubuntucve
CVE-2021-26937
2021-02-09 00:00:00
cbl_mariner
cbl_mariner
CVE-2021-26937 affecting package screen for versions less than 4.9.1-1
2023-09-28 12:35:58
alpinelinux
alpinelinux
CVE-2021-26937
2021-02-09 20:15:14
cvelist
cvelist
CVE-2021-26937
2021-02-09 19:35:50
redhatcve
redhatcve
CVE-2021-26937
2021-02-10 01:03:57
cloudlinux
cloudlinux
Fix of CVE: CVE-2021-26937
2021-04-15 14:32:11
debiancve
debiancve
CVE-2021-26937
2021-02-09 20:15:14
redhat
redhat
(RHSA-2021:0742) Important: screen security update
2021-03-08 09:16:28
(RHSA-2022:1074) Important: screen security update
2022-03-28 09:00:30
prion
prion
Command injection
2021-02-09 20:15:00
veracode
veracode
Denial Of Service (DoS)
2021-02-11 12:01:53
gentoo
gentoo
GNU Screen: User-assisted execution of arbitrary code
2021-05-26 00:00:00
cve
cve
CVE-2021-26937
2021-02-09 20:15:14
amazon
amazon
Low: screen
2021-04-07 00:18:00
nvd
nvd
CVE-2021-26937
2021-02-09 20:15:14
rosalinux
rosalinux
Advisory ROSA-SA-2021-1968
2021-07-02 18:07:47

CVSS2

7.5

Attack Vector

NETWORK

Attack 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

CVSS3

9.8

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

AI Score

9.8

Confidence

High

EPSS

0.015

Percentile

86.7%

JSON
Related for ALAS2-2021-1623
osv5openvas19fedora2debian3nessus36mageia1centos1ubuntu2oraclelinux1suse1ubuntucve1cbl_mariner1alpinelinux1cvelist1redhatcve1cloudlinux1debiancve1redhat2prion1veracode1gentoo1cve1amazon1nvd1rosalinux1