GNU Screen: Buffer overflow — GLSA 202003-62

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

Affected packages

app-misc/screen on all architectures
Affected versions < 4.8.0
Unaffected versions >= 4.8.0

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

Release date
March 30, 2020

Latest revision
March 30, 2020: 1

Severity
normal

Exploitable
remote

Bugzilla entries