CVE-2006-3409

CVE-2006-3409 is a high-severity vulnerability in Tor with a CVSS 2.0 base score of 7.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low.

Key facts

Description

Integer overflow in Tor before 0.1.1.20 allows remote attackers to execute arbitrary code via crafted large inputs, which result in a buffer overflow when elements are added to smartlists.

Frequently asked questions

What is CVE-2006-3409?
Integer overflow in Tor before 0.1.1.20 allows remote attackers to execute arbitrary code via crafted large inputs, which result in a buffer overflow when elements are added to smartlists.
How severe is CVE-2006-3409?
CVE-2006-3409 has a CVSS 2.0 base score of 7.5, rated high severity.
Is CVE-2006-3409 being actively exploited?
It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 4% (88th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2006-3409?
CVE-2006-3409 primarily affects Tor. In total, 68 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2006-3409?
Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2006-3409 published?
CVE-2006-3409 was published on 2006-07-07 and last updated on 2026-06-16.

References

Affected products (68)

More vulnerabilities in Tor

All CVEs affecting Tor →