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    CVE-2006-4573

    Multiple unspecified vulnerabilities in the "utf8 combining characters handling" (utf8_handle_comb function in encoding.c) in screen before 4.0.3 allows user-assisted attackers to cause a denial of service (crash or hang) via certain UTF8 sequences.

    Published:Oct 23, 2006
    Last Modified:Apr 23, 2026
    EPS:Oct 24, 2006
    EPSS Score:0.01187
    CVSS Score:2.6

    Affected Products

    Vendor
    Gnu
    Product
    Screen

    Exploits

    No exploit reference

    Common Weakness Enumeration

    No CWE recorded yet

    Common Attack Pattern Enumeration and Classification (CAPEC)

    No CAPEC recorded yet

    Related CVEs

    CVE-2025-46802 (CVSS 5.3) — For a short time they PTY is set to mode 666, allowing any user on the system to connect to the screen session…
    CVE-2025-46803 (CVSS 5.1) — The default mode of pseudo terminals (PTYs) allocated by Screen was changed from 0620 to 0622, thereby allowin…
    CVE-2025-46804 (CVSS 2) — A minor information leak when running Screen with setuid-root privileges allows unprivileged users to deduce i…
    CVE-2023-24626 (CVSS 6.5) — socket.c in GNU Screen through 4.9.0, when installed setuid or setgid (the default on platforms such as Arch L…
    CVE-2021-26937 (CVSS 9.8) — encoding.c in GNU Screen through 4.8.0 allows remote attackers to cause a denial of service (invalid write acc…
    CVE-2020-9366 (CVSS 9.8) — A buffer overflow was found in the way GNU Screen before 4.8.0 treated the special escape OSC 49. Specially cr…
    CVE-2017-5618 (CVSS 7.8) — GNU screen before 4.5.1 allows local users to modify arbitrary files and consequently gain root privileges by …
    CVE-2009-1214 (CVSS 4.9) — GNU screen 4.0.3 creates the /tmp/screen-exchange temporary file with world-readable permissions, which might …
    CVE-2007-3048 (CVSS 7.2) — GNU screen 4.0.3 allows local users to unlock the screen via a CTRL-C sequence at the password prompt. NOTE: …
    CVE-2003-0972 (CVSS 10) — Integer signedness error in ansi.c for GNU screen 4.0.1 and earlier, and 3.9.15 and earlier, allows local user…

    References

    http://docs.info.apple.com/article.html?artnum=305530
    http://lists.apple.com/archives/security-announce/2007/May/msg00004.html
    http://lists.gnu.org/archive/html/screen-users/2006-10/msg00028.html
    http://secunia.com/advisories/22573
    http://secunia.com/advisories/22583
    http://secunia.com/advisories/22611
    http://secunia.com/advisories/22647
    http://secunia.com/advisories/22649
    http://secunia.com/advisories/22707
    http://secunia.com/advisories/22726
    http://secunia.com/advisories/25402
    http://security.gentoo.org/glsa/glsa-200611-01.xml
    http://slackware.com/security/viewer.php?l=slackware-security&y=2006&m=slackware-security.480775
    http://www.debian.org/security/2006/dsa-1202
    http://www.mandriva.com/security/advisories?name=MDKSA-2006:191
    http://www.openpkg.org/security/advisories/OpenPKG-SA-2006.026-screen.html
    http://www.securityfocus.com/bid/20727
    http://www.ubuntu.com/usn/usn-370-1
    http://www.vupen.com/english/advisories/2006/4189
    http://www.vupen.com/english/advisories/2007/1939
    https://issues.rpath.com/browse/RPL-734
    http://docs.info.apple.com/article.html?artnum=305530
    http://lists.apple.com/archives/security-announce/2007/May/msg00004.html
    http://lists.gnu.org/archive/html/screen-users/2006-10/msg00028.html
    http://secunia.com/advisories/22573
    http://secunia.com/advisories/22583
    http://secunia.com/advisories/22611
    http://secunia.com/advisories/22647
    http://secunia.com/advisories/22649
    http://secunia.com/advisories/22707
    http://secunia.com/advisories/22726
    http://secunia.com/advisories/25402
    http://security.gentoo.org/glsa/glsa-200611-01.xml
    http://slackware.com/security/viewer.php?l=slackware-security&y=2006&m=slackware-security.480775
    http://www.debian.org/security/2006/dsa-1202
    http://www.mandriva.com/security/advisories?name=MDKSA-2006:191
    http://www.openpkg.org/security/advisories/OpenPKG-SA-2006.026-screen.html
    http://www.securityfocus.com/bid/20727
    http://www.ubuntu.com/usn/usn-370-1
    http://www.vupen.com/english/advisories/2006/4189
    http://www.vupen.com/english/advisories/2007/1939
    https://issues.rpath.com/browse/RPL-734

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High