CVE-2008-5500

CRITICAL

The layout engine in Mozilla Firefox 3.x before 3.0.5 and 2.x before 2.0.0.19, Thunderbird 2.x before 2.0.0.19, and SeaMonkey 1.x before 1.1.14 allows remote attackers to cause a denial of service ...

Affects 5 products across 3 vendors.

CVSS 2.010.0
EPSS3.2%
Percentile88th
PatchUnknown
CVSS Vector — Plain English Remotely exploitable over the network, low complexity.
CWE Weakness Definitions
CWE-399: Resource Management Errors

Broad class covering failures in managing system resources such as memory, file handles, and connections.

◆ AI Analysis — automated analysis, not human-reviewed

This vulnerability was disclosed in 2008. A critical vulnerability affects Canonical systems (CVE-2008-5500). No public exploit code is currently available. Isolate affected systems if patching is not feasible.

BSID: BS-2008-GLOBAL-022828-C • Model: rule-based-v1 • Confidence: MEDIUM

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Frequently Asked Questions
What is CVE-2008-5500?
This vulnerability was disclosed in 2008. A critical vulnerability affects Canonical systems (CVE-2008-5500). No public exploit code is currently available. Isolate affected systems if patching is not feasible.
What is the CVSS score for CVE-2008-5500?
CVE-2008-5500 has CVSS 10.0 (Critical). Vector: AV:N/AC:L/Au:N/C:C/I:C/A:C. EPSS: 3.2%.
Is CVE-2008-5500 actively exploited?
No confirmed active exploitation of CVE-2008-5500 as of 2026-09-25.
How do I remediate CVE-2008-5500?
Priority: MEDIUM. Advisory: http://www.mozilla.org/security/announce/2008/mfsa2008-60.html PSIRT: [email protected]
What systems are affected by CVE-2008-5500?
CVE-2008-5500 affects Canonical Ubuntu Linux; Debian Debian Linux; Mozilla Firefox, Thunderbird, Seamonkey.
Vulnerability Details
CVE IDCVE-2008-5500
BSIDBS-2008-GLOBAL-022828-C BreachSpider Global ID
CVSS VectorAV:N/AC:L/Au:N/C:C/I:C/A:C
Published2008-12-17
Last Modified2026-06-16
ICS Relevance0%
Weakness (CWE)
Resource Management Errors
SourceNVD
Official Description

The layout engine in Mozilla Firefox 3.x before 3.0.5 and 2.x before 2.0.0.19, Thunderbird 2.x before 2.0.0.19, and SeaMonkey 1.x before 1.1.14 allows remote attackers to cause a denial of service (crash) and possibly trigger memory corruption via vectors related to (1) a reachable assertion or (2) an integer overflow.

Source: NIST NVD / MITRE CVE Database

Attack Vector Analysis — CITED Relevance

Vulnerability details: The layout engine in Mozilla Firefox 3.x before 3.0.5 and 2.x before 2.0.0.19, Thunderbird 2.x before 2.0.0.19, and SeaMonkey 1.x before 1.1.14 allows remote attackers to cause a denial of service (crash) and possibly trigger memory corruption via vectors related to (1) a reachable assertion or (2) an integer overflow. CVSS vector: AV:N/AC:L/Au:N/C:C/I:C/A:C.

Exploitation Likelihood: LOW

Affected Products
VendorProductAffected Versions
Canonical Ubuntu Linux 6.06 7.10 8.04 8.10
Debian Debian Linux 4.0 5.0
Mozilla Firefox ≥ 2.0, < 2.0.0.19 ≥ 3.0, < 3.0.5
Mozilla Thunderbird ≥ 2.0, < 2.0.0.19
Mozilla Seamonkey ≥ 1.0, < 1.1.14
Remediation
View Vendor Advisory →

Remediation Priority: MEDIUM

Vendor PSIRT: [email protected]
Threat Intelligence
● Threat Intelligence Validated: October 2026 | Threat Age: 6511 Days
CISA known-exploitedNot in KEV catalog
Public ExploitNot confirmed
PoC CodeNot confirmed
AI Enrichment Record — provenance & audit hash
Modelrule-based-v1
ConfidenceMEDIUM
Enriched At2026-05-24
SHA-512 Audit Hash24ee16e7129174251651a0c961bb9afcc736a26a9ea0b6c14a93817425f2f8506b4789f699cd9c246e6e63839ae097b85f82f7ddf92d488222ffd19e08515336
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