A vulnerability in GNU screen may allow a remote attacker to execute arbitrary code.
|Package||app-misc/screen on all architectures|
|Affected versions||< 4.8.0-r2|
|Unaffected versions||>= 4.8.0-r2|
GNU Screen is a full-screen window manager that multiplexes a physical terminal between several processes, typically interactive shells.
It was discovered that GNU screen did not properly handle certain UTF-8 character sequences.
A remote attacker could entice a user to run a program where attacker controls the output inside a GNU screen session, possibly resulting in execution of arbitrary code with the privileges of the process or a Denial of Service condition.
This vulnerability can be mitigated by disabling UTF-8 processing in .screenrc.
All GNU screen users should upgrade to the latest version:
# emerge --sync # emerge --ask --oneshot --verbose ">=app-misc/screen-4.8.0-r2"
May 26, 2021
May 26, 2021: 1