CVE-2020-9366

screen: Out of bounds access when setting w_xtermosc after OSC 49

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Severity

Moderate

Red Hat Product Security

6.1

CVSS 3.1

Review impact separately from score.

Published · February 6, 2020

Updated · November 21, 2025

Description

A buffer overflow was found in the way GNU Screen before 4.8.0 treated the special escape OSC 49. Specially crafted output, or a special program, could corrupt memory and crash Screen or possibly have unspecified other impact.

Statement

It is believed that the vulnerability was caused by upstream commit c5db181. GNU screen versions prior to 4.7.0 do not seem to be impacted.

CVSS score applicability

The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.

Mitigation

No mitigation is specified in collected source.

CVSS / CWE

CVSS 3.1 · 6.1
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:L

CWE-119 · Improper Restriction of Operations within the Bounds of a Memory Buffer