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    CVE-2009-0071

    Mozilla Firefox 3.0.5 and earlier 3.0.x versions, when designMode is enabled, allows remote attackers to cause a denial of service (NULL pointer dereference and application crash) via a certain (a) replaceChild or (b) removeChild call, followed by a (1) queryCommandValue, (2) queryCommandState, or (3) queryCommandIndeterm call. NOTE: it was later reported that 3.0.6 and 3.0.7 are also affected.

    Published:Jan 8, 2009
    Last Modified:Apr 23, 2026
    EPS:Jan 8, 2009
    EPSS Score:0.10859
    CVSS Score:2.6

    Affected Products

    Vendor
    Mozilla
    Product
    Firefox

    Exploits

    http://www.securityfocus.com/bid/33154http://www.securityfocus.com/bid/33154https://www.exploit-db.com/exploits/8091

    Common Weakness Enumeration

    No CWE recorded yet

    Common Attack Pattern Enumeration and Classification (CAPEC)

    No CAPEC recorded yet

    Related CVEs

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    CVE-2026-84143 (CVSS 9.8) — Internally found bugs present in Thunderbird 154, Thunderbird ESR 153.1 and Thunderbird ESR 140.14. Some of th…
    CVE-2026-84142 (CVSS 9.8) — Internally found bugs present in Thunderbird 154. Some of these bugs showed evidence of memory corruption or a…
    CVE-2026-84141 (CVSS 9.8) — Integer overflow in the Graphics: ImageLib component. This vulnerability was fixed in Firefox 155, Firefox ESR…
    CVE-2026-84140 (CVSS 9.8) — Site isolation issue in the DOM: Navigation component. This vulnerability was fixed in Firefox 155, Firefox ES…
    CVE-2026-84139 (CVSS 6.1) — Clickjacking issue in the DOM: Events component. This vulnerability was fixed in Firefox 155, Firefox ESR 153.…
    CVE-2026-84138 (CVSS 6.5) — Denial-of-service in the PDF Viewer component. This vulnerability was fixed in Firefox 155 and Thunderbird 155…
    CVE-2026-84137 (CVSS 4.3) — Spoofing issue in the DOM: Core & HTML component. This vulnerability was fixed in Firefox 155, Firefox ESR 153…
    CVE-2026-84136 (CVSS 6.1) — Other issue in the DOM: Navigation component. This vulnerability was fixed in Firefox 155, Firefox ESR 153.2, …
    CVE-2026-84135 (CVSS 9.8) — Other issue in Firefox Focus for Android. This vulnerability was fixed in Firefox 155.…

    References

    http://archives.neohapsis.com/archives/fulldisclosure/2009-01/0220.html
    http://archives.neohapsis.com/archives/fulldisclosure/2009-01/0223.html
    http://archives.neohapsis.com/archives/fulldisclosure/2009-01/0224.html
    http://www.securityfocus.com/bid/33154
    https://bugzilla.mozilla.org/show_bug.cgi?id=448329
    https://bugzilla.mozilla.org/show_bug.cgi?id=456727
    https://bugzilla.mozilla.org/show_bug.cgi?id=472507
    https://www.exploit-db.com/exploits/8091
    https://www.exploit-db.com/exploits/8219
    http://archives.neohapsis.com/archives/fulldisclosure/2009-01/0220.html
    http://archives.neohapsis.com/archives/fulldisclosure/2009-01/0223.html
    http://archives.neohapsis.com/archives/fulldisclosure/2009-01/0224.html
    http://www.securityfocus.com/bid/33154
    https://bugzilla.mozilla.org/show_bug.cgi?id=448329
    https://bugzilla.mozilla.org/show_bug.cgi?id=456727
    https://bugzilla.mozilla.org/show_bug.cgi?id=472507
    https://www.exploit-db.com/exploits/8091
    https://www.exploit-db.com/exploits/8219

    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