Executive Summary



This Alert is flagged as TOP 25 Common Weakness Enumeration from CWE/SANS. For more information, you can read this.
Summary
Title GNU Screen: Buffer overflow
Informations
Name GLSA-202003-62 First vendor Publication 2020-03-30
Vendor Gentoo Last vendor Modification 2020-03-30
Severity (Vendor) N/A Revision N/A

Security-Database Scoring CVSS v3

Cvss vector : CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Overall CVSS Score 9.8
Base Score 9.8 Environmental Score 9.8
impact SubScore 5.9 Temporal Score 9.8
Exploitabality Sub Score 3.9
 
Attack Vector Network Attack Complexity Low
Privileges Required None User Interaction None
Scope Unchanged Confidentiality Impact High
Integrity Impact High Availability Impact High
Calculate full CVSS 3.0 Vectors scores

Security-Database Scoring CVSS v2

Cvss vector : (AV:N/AC:L/Au:N/C:P/I:P/A:P)
Cvss Base Score 7.5 Attack Range Network
Cvss Impact Score 6.4 Attack Complexity Low
Cvss Expoit Score 10 Authentication None Required
Calculate full CVSS 2.0 Vectors scores

Detail

Synopsis

A buffer overflow in GNU Screen might allow remote attackers to corrupt memory.

Background

GNU Screen is a full-screen window manager that multiplexes a physical terminal between several processes, typically interactive shells.

Description

A buffer overflow was found in the way GNU Screen treated the special escape OSC 49.

Impact

A remote attacker, by writing a specially crafted string of characters to a GNU Screen window, could possibly corrupt memory or have other unspecified impact.

Workaround

There is no known workaround at this time.

Resolution

All GNU Screen users should upgrade to the latest version:
# emerge --sync
# emerge --ask --oneshot --verbose ">=app-misc/screen-4.8.0"

References

[ 1 ] CVE-2020-9366 : https://nvd.nist.gov/vuln/detail/CVE-2020-9366

Availability

This GLSA and any updates to it are available for viewing at the Gentoo Security Website:

https://security.gentoo.org/glsa/202003-62

Original Source

Url : http://security.gentoo.org/glsa/glsa-202003-62.xml

CWE : Common Weakness Enumeration

% Id Name
100 % CWE-120 Buffer Copy without Checking Size of Input ('Classic Buffer Overflow') (CWE/SANS Top 25)

CPE : Common Platform Enumeration

TypeDescriptionCount
Application 10

Alert History

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0
1
Date Informations
2020-05-23 13:03:43
  • Multiple Updates
2020-03-30 17:19:20
  • First insertion