OpenPKG Security Advisory

Publisher Name:          OpenPKG GmbH
Publisher Home:          http://openpkg.com/

Advisory Id (public):    OpenPKG-SA-2003.050
Advisory Type:           OpenPKG Security Advisory (SA)
Advisory Directory:      http://openpkg.com/go/OpenPKG-SA
Advisory Document:       http://openpkg.com/go/OpenPKG-SA-2003.050
Advisory Published:      2010-02-09 15:51 UTC

Issue Id (internal):     OpenPKG-SI-20031128.01
Issue First Created:     2003-11-28
Issue Last Modified:     2006-11-28
Issue Revision:          05


Subject Name:            Screen
Subject Summary:         Virtual Screen Manager
Subject Home:            http://www.gnu.org/software/screen/
Subject Versions:        * <= 4.0.1

Vulnerability Id:        none
Vulnerability Scope:     global (not OpenPKG specific)

Attack Feasibility:      run-time
Attack Vector:           local system
Attack Impact:           privilege escalation

Description:
    Timo Sirainen reported and fixed [1] a buffer overflow bug which
    allows privilege escalation in the Virtual Screen Manager GNU screen
    [2], whose executable is installed setuid-root. It also has some
    potential for attackers getting control of another user's screen.
    Transfer of approximately two gigabytes of data is required to exploit
    this vulnerability.

References:
    [1] http://www.securityfocus.com/archive/1/345844/2003-11-24/2003-11-30/0
    [2] http://www.gnu.org/software/screen/
    [3] http://www.openpkg.org/tutorial.html#regular-source
    [4] http://www.openpkg.org/tutorial.html#regular-binary
    [5] ftp://ftp.openpkg.org/release/1.2/UPD/screen-3.9.13-1.2.1.src.rpm
    [6] ftp://ftp.openpkg.org/release/1.3/UPD/screen-3.9.15-1.3.1.src.rpm
    [7] ftp://ftp.openpkg.org/release/1.2/UPD/
    [8] ftp://ftp.openpkg.org/release/1.3/UPD/
    [9] http://www.openpkg.org/security.html#signature


Primary Package Name:    screen
Primary Package Home:    http://openpkg.org/go/package/screen

Affected Distribution:   Affected Branch:  Affected Package:
OpenPKG Community        1.2-SOLID         screen-3.9.13-1.2.0
OpenPKG Community        1.3-SOLID         screen-3.9.15-1.3.0
OpenPKG Community        CURRENT           screen-4.0.1-20031009

Corrected Distribution:  Corrected Branch: Corrected Package:
OpenPKG Community        1.2-SOLID         screen-3.9.13-1.2.1
OpenPKG Community        1.3-SOLID         screen-3.9.15-1.3.1
OpenPKG Community        CURRENT           screen-4.0.1-20031127