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Joined: 12 May 2004
Posts: 2331

PostPosted: Mon Mar 30, 2020 3:26 pm    Post subject: [ GLSA 202003-62 ] GNU Screen Reply with quote

Gentoo Linux Security Advisory

Title: GNU Screen: Buffer overflow (GLSA 202003-62)
Severity: normal
Exploitable: remote
Date: 2020-03-30
Bug(s): #708460
ID: 202003-62


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


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

Affected Packages

Package: app-misc/screen
Vulnerable: < 4.8.0
Unaffected: >= 4.8.0
Architectures: All supported architectures


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


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.


There is no known workaround at this time.


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


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