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    CVE-2008-5014

    jslock.cpp in Mozilla Firefox 3.x before 3.0.2, Firefox 2.x before 2.0.0.18, Thunderbird 2.x before 2.0.0.18, and SeaMonkey 1.x before 1.1.13 allows remote attackers to cause a denial of service (crash) and possibly execute arbitrary code by modifying the window.__proto__.__proto__ object in a way that causes a lock on a non-native object, which triggers an assertion failure related to the OBJ_IS_NATIVE function.

    Published:Nov 12, 2008
    Last Modified:Apr 23, 2026
    EPS:Nov 13, 2008
    EPSS Score:0.25205
    CVSS Score:10

    Affected Products

    Vendor
    Canonical
    Product
    Ubuntu Linux
    Vendor
    Debian
    Product
    Debian Linux
    Vendor
    Mozilla
    Product
    Firefox
    Vendor
    Mozilla
    Product
    Seamonkey
    Vendor
    Mozilla
    Product
    Thunderbird
    Vendor
    Redhat
    Product
    Enterprise Linux

    Exploits

    No exploit reference

    Common Weakness Enumeration

    CWE-20 Improper Input Validation

    Common Attack Pattern Enumeration and Classification (CAPEC)

    CAPEC-10 Buffer Overflow via Environment Variables
    CAPEC-101 Server Side Include (SSI) Injection
    CAPEC-104 Cross Zone Scripting
    CAPEC-108 Command Line Execution through SQL Injection
    CAPEC-109 Object Relational Mapping Injection
    CAPEC-110 SQL Injection through SOAP Parameter Tampering
    CAPEC-120 Double Encoding
    CAPEC-13 Subverting Environment Variable Values
    CAPEC-135 Format String Injection
    CAPEC-136 LDAP Injection
    CAPEC-14 Client-side Injection-induced Buffer Overflow
    CAPEC-153 Input Data Manipulation
    CAPEC-182 Flash Injection
    CAPEC-209 XSS Using MIME Type Mismatch
    CAPEC-22 Exploiting Trust in Client
    CAPEC-23 File Content Injection
    CAPEC-230 Serialized Data with Nested Payloads
    CAPEC-231 Oversized Serialized Data Payloads
    CAPEC-24 Filter Failure through Buffer Overflow
    CAPEC-250 XML Injection
    CAPEC-261 Fuzzing for garnering other adjacent user/sensitive data
    CAPEC-267 Leverage Alternate Encoding
    CAPEC-28 Fuzzing
    CAPEC-3 Using Leading 'Ghost' Character Sequences to Bypass Input Filters
    CAPEC-31 Accessing/Intercepting/Modifying HTTP Cookies
    CAPEC-42 MIME Conversion
    CAPEC-43 Exploiting Multiple Input Interpretation Layers
    CAPEC-45 Buffer Overflow via Symbolic Links
    CAPEC-46 Overflow Variables and Tags
    CAPEC-47 Buffer Overflow via Parameter Expansion
    CAPEC-473 Signature Spoof
    CAPEC-52 Embedding NULL Bytes
    CAPEC-53 Postfix, Null Terminate, and Backslash
    CAPEC-588 DOM-Based XSS
    CAPEC-63 Cross-Site Scripting (XSS)
    CAPEC-64 Using Slashes and URL Encoding Combined to Bypass Validation Logic
    CAPEC-664 Server Side Request Forgery
    CAPEC-67 String Format Overflow in syslog()
    CAPEC-7 Blind SQL Injection
    CAPEC-71 Using Unicode Encoding to Bypass Validation Logic
    CAPEC-72 URL Encoding
    CAPEC-73 User-Controlled Filename
    CAPEC-78 Using Escaped Slashes in Alternate Encoding
    CAPEC-79 Using Slashes in Alternate Encoding
    CAPEC-8 Buffer Overflow in an API Call
    CAPEC-80 Using UTF-8 Encoding to Bypass Validation Logic
    CAPEC-81 Web Server Logs Tampering
    CAPEC-83 XPath Injection
    CAPEC-85 AJAX Footprinting
    CAPEC-88 OS Command Injection
    CAPEC-9 Buffer Overflow in Local Command-Line Utilities

    Related CVEs

    CVE-2026-13476 (CVSS 7.3) — IBM Informix Dynamic Server 14.10, 15.0, and 12.10 could allow an unauthenticated user to execute arbitrary co…
    CVE-2026-13367 (CVSS 7.8) — IBM Informix Dynamic Server 14.10, and 15.0 contain a local privilege escalation vulnerability in the oninit s…
    CVE-2026-47337 (CVSS 3.3) — Ubuntu Linux 6.8, 6.17 and 7.0 contain SAUCE patches with a possible NULL pointer dereference in the handling …
    CVE-2026-47336 (CVSS 3.3) — Ubuntu Linux 6.8 contains SAUCE patches with a possible use of an uninitialized variable in AppArmor AF_INET/A…
    CVE-2026-47335 (CVSS 5.5) — Ubuntu Linux 6.8 contains SAUCE patches with a possible NULL pointer dereference in the handling of AppArmor n…
    CVE-2026-47334 (CVSS 5.5) — Ubuntu Linux 6.8, 6.17 and 7.0 contain AppArmor SAUCE patches which incorrectly sleep while holding a spinlock…
    CVE-2026-47333 (CVSS 7.8) — Ubuntu Linux 6.8, 6.17 and 7.0 contain AppArmor SAUCE patches which can potentially incorrectly compute the si…
    CVE-2026-47332 (CVSS 5.5) — Ubuntu Linux 6.8, 6.17 and 7.0 contain AppArmor SAUCE patches which incorrectly validate the size of an intern…
    CVE-2026-47331 (CVSS 7.8) — Ubuntu Linux 6.8 contains AppArmor SAUCE patches which fail to acquire a lock when modifying a linked list. An…
    CVE-2026-47330 (CVSS 3.3) — Ubuntu Linux 6.8, 7.17 and 7.0 contain AppArmor SAUCE patches which can, under certain circumstances, use an u…

    References

    http://lists.opensuse.org/opensuse-security-announce/2008-11/msg00004.html
    http://secunia.com/advisories/32011
    http://secunia.com/advisories/32684
    http://secunia.com/advisories/32693
    http://secunia.com/advisories/32694
    http://secunia.com/advisories/32695
    http://secunia.com/advisories/32714
    http://secunia.com/advisories/32715
    http://secunia.com/advisories/32721
    http://secunia.com/advisories/32778
    http://secunia.com/advisories/32798
    http://secunia.com/advisories/32845
    http://secunia.com/advisories/32853
    http://secunia.com/advisories/33433
    http://secunia.com/advisories/33434
    http://secunia.com/advisories/34501
    http://sunsolve.sun.com/search/document.do?assetkey=1-26-256408-1
    http://ubuntu.com/usn/usn-667-1
    http://www.debian.org/security/2008/dsa-1669
    http://www.debian.org/security/2008/dsa-1671
    http://www.debian.org/security/2009/dsa-1696
    http://www.debian.org/security/2009/dsa-1697
    http://www.mandriva.com/security/advisories?name=MDVSA-2008:228
    http://www.mandriva.com/security/advisories?name=MDVSA-2008:230
    http://www.mandriva.com/security/advisories?name=MDVSA-2008:235
    http://www.mozilla.org/security/announce/2008/mfsa2008-50.html
    http://www.redhat.com/support/errata/RHSA-2008-0976.html
    http://www.redhat.com/support/errata/RHSA-2008-0977.html
    http://www.redhat.com/support/errata/RHSA-2008-0978.html
    http://www.securityfocus.com/bid/32281
    http://www.securitytracker.com/id?1021182
    http://www.us-cert.gov/cas/techalerts/TA08-319A.html
    http://www.vupen.com/english/advisories/2008/3146
    http://www.vupen.com/english/advisories/2009/0977
    https://bugzilla.mozilla.org/show_bug.cgi?id=436741
    https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A9157
    https://www.redhat.com/archives/fedora-package-announce/2008-November/msg00366.html
    https://www.redhat.com/archives/fedora-package-announce/2008-November/msg00385.html
    http://lists.opensuse.org/opensuse-security-announce/2008-11/msg00004.html
    http://secunia.com/advisories/32011
    http://secunia.com/advisories/32684
    http://secunia.com/advisories/32693
    http://secunia.com/advisories/32694
    http://secunia.com/advisories/32695
    http://secunia.com/advisories/32714
    http://secunia.com/advisories/32715
    http://secunia.com/advisories/32721
    http://secunia.com/advisories/32778
    http://secunia.com/advisories/32798
    http://secunia.com/advisories/32845
    http://secunia.com/advisories/32853
    http://secunia.com/advisories/33433
    http://secunia.com/advisories/33434
    http://secunia.com/advisories/34501
    http://sunsolve.sun.com/search/document.do?assetkey=1-26-256408-1
    http://ubuntu.com/usn/usn-667-1
    http://www.debian.org/security/2008/dsa-1669
    http://www.debian.org/security/2008/dsa-1671
    http://www.debian.org/security/2009/dsa-1696
    http://www.debian.org/security/2009/dsa-1697
    http://www.mandriva.com/security/advisories?name=MDVSA-2008:228
    http://www.mandriva.com/security/advisories?name=MDVSA-2008:230
    http://www.mandriva.com/security/advisories?name=MDVSA-2008:235
    http://www.mozilla.org/security/announce/2008/mfsa2008-50.html
    http://www.redhat.com/support/errata/RHSA-2008-0976.html
    http://www.redhat.com/support/errata/RHSA-2008-0977.html
    http://www.redhat.com/support/errata/RHSA-2008-0978.html
    http://www.securityfocus.com/bid/32281
    http://www.securitytracker.com/id?1021182
    http://www.us-cert.gov/cas/techalerts/TA08-319A.html
    http://www.vupen.com/english/advisories/2008/3146
    http://www.vupen.com/english/advisories/2009/0977
    https://bugzilla.mozilla.org/show_bug.cgi?id=436741
    https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A9157
    https://www.redhat.com/archives/fedora-package-announce/2008-November/msg00366.html
    https://www.redhat.com/archives/fedora-package-announce/2008-November/msg00385.html

    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