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ubuntuUbuntuUSN-4747-1
HistoryFeb 24, 2021 - 12:00 a.m.

GNU Screen vulnerability

2021-02-2400:00:00
ubuntu.com
114

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

9.8 High

AI Score

Confidence

High

7.5 High

CVSS2

Access Vector

Access Complexity

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

86.7%

Releases

  • Ubuntu 20.10
  • Ubuntu 20.04 LTS
  • Ubuntu 18.04 ESM
  • Ubuntu 16.04 ESM

Packages

  • screen - terminal multiplexer with VT100/ANSI terminal emulation

Details

Felix Weinmann discovered that GNU Screen incorrectly handled certain
character sequences. A remote attacker could use this issue to cause GNU
Screen to crash, resulting in a denial of service, or possibly execute
arbitrary code.

OSVersionArchitecturePackageVersionFilename
Ubuntu20.10noarchscreen< 4.8.0-2ubuntu0.1UNKNOWN
Ubuntu20.10noarchscreen-dbgsym< 4.8.0-2ubuntu0.1UNKNOWN
Ubuntu20.10noarchscreen-udeb< 4.8.0-2ubuntu0.1UNKNOWN
Ubuntu20.04noarchscreen< 4.8.0-1ubuntu0.1UNKNOWN
Ubuntu20.04noarchscreen-dbgsym< 4.8.0-1ubuntu0.1UNKNOWN
Ubuntu20.04noarchscreen-udeb< 4.8.0-1ubuntu0.1UNKNOWN
Ubuntu18.04noarchscreen< 4.6.2-1ubuntu1.1UNKNOWN
Ubuntu18.04noarchscreen-dbgsym< 4.6.2-1ubuntu1.1UNKNOWN
Ubuntu18.04noarchscreen-udeb< 4.6.2-1ubuntu1.1UNKNOWN
Ubuntu16.04noarchscreen< 4.3.1-2ubuntu0.1UNKNOWN
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1-10 of 121

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

9.8 High

AI Score

Confidence

High

7.5 High

CVSS2

Access Vector

Access Complexity

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

86.7%