CVE-2010-3765
Mozilla Firefox, SeaMonkey, and Thunderbird contain an unspecified vulnerability when JavaScript is enabled. This allows remote attackers to execute arbitrary code via vectors related to nsCSSFrameConstructor::ContentAppended, the appendChild method, incorrect index tracking, and the creation of multiple frames, which triggers memory corruption.
Mozilla Firefox 3.5.x through 3.5.14 and 3.6.x through 3.6.11, Thunderbird 3.1.6 before 3.1.6 and 3.0.x before 3.0.10, and SeaMonkey 2.x before 2.0.10, when JavaScript is enabled, allows remote attackers to execute arbitrary code via vectors related to nsCSSFrameConstructor::ContentAppended, the appendChild method, incorrect index tracking, and the creation of multiple frames, which triggers memory corruption, as exploited in the wild in October 2010 by the Belmoo malware.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H- blog.mozilla.com/security/2010/10/26/critical-vulnerability-in-firefox-3-5-and-firefox-3-6/Vendor Advisory
- blogs.sun.com/security/entry/multiple_vulnerabilities_in_mozilla_firefoxBroken Link
- isc.sans.edu/diary.html?storyid=9817Press/Media Coverage
- lists.fedoraproject.org/pipermail/package-announce/2010-November/050233.htmlThird Party Advisory
- lists.fedoraproject.org/pipermail/package-announce/2010-October/050061.htmlThird Party Advisory
- lists.fedoraproject.org/pipermail/package-announce/2010-October/050077.htmlThird Party Advisory
- lists.fedoraproject.org/pipermail/package-announce/2010-October/050154.htmlThird Party Advisory
- norman.com/about_norman/press_center/news_archive/2010/129223/en?utm_source=twitterfeed&utm_medium=twitterProduct
- secunia.com/advisories/41761Vendor Advisory
- secunia.com/advisories/41965Vendor Advisory
- secunia.com/advisories/41966Vendor Advisory
- secunia.com/advisories/41969Vendor Advisory
Actively exploited. Patch immediately.
- Exploitation
- Confirmed in the wild (CISA KEV)
- Federal remediation deadline
- Overdue by 364 days
- CVSS
- 9.8 CRITICAL
- EPSS (30-day exploit probability)
- 83.2% · top 1% of all CVEs
- Weakness
- CWE-119
- Attack vector
- Network, remotely reachable
- Preconditions
- No privileges and no user interaction
- 1.Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
- 2.Treat as emergency change: patch or isolate internet-facing instances first.
- 3.Review exposure: confirm which instances are reachable from the internet and restrict access until patched.
- 4.Hunt for compromise: review logs for the disclosure window, not just from the patch date.
Assessment is derived automatically from the live signals above; verify against your own asset inventory.