1. Gentoo Linux Security Advisory
| Advisory Reference | GLSA 200611-01 / screen |
| Release Date | November 03, 2006 |
| Latest Revision | November 03, 2006: 01 |
| Impact | high |
| Exploitable | remote |
| Package | Vulnerable versions | Unaffected versions | Architecture(s) |
| app-misc/screen | < 4.0.3 | >= 4.0.3 | All supported architectures |
Related bugreports: #152770
Screen contains an error in its UTF-8 character handling code that would allow a remote Denial of Service or possibly the remote execution of arbitrary code.
Screen is a full-screen window manager that multiplexes a physical terminal between several processes, typically interactive shells.
cstone and Richard Felker discovered a flaw in Screen's UTF-8 combining character handling.
The vulnerability can be exploited by writing a special string of characters to a Screen window. A remote attacker could cause a Denial of Service or possibly execute arbitrary code with the privileges of the user running Screen through a program being run inside a Screen session, such as an IRC client or a mail client.
There is no known workaround at this time.
All Screen users should upgrade to the latest version:
Code Listing 3.1: Resolution |
# emerge --sync # emerge --ask --oneshot --verbose ">=app-misc/screen-4.0.3" |