CVE-2012-3519

CVE-2012-3519 is a medium-severity vulnerability in Tor with a CVSS 2.0 base score of 5.0. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-200.

Key facts

Description

routerlist.c in Tor before 0.2.2.38 uses a different amount of time for relay-list iteration depending on which relay is chosen, which might allow remote attackers to obtain sensitive information about relay selection via a timing side-channel attack.

Frequently asked questions

What is CVE-2012-3519?
routerlist.c in Tor before 0.2.2.38 uses a different amount of time for relay-list iteration depending on which relay is chosen, which might allow remote attackers to obtain sensitive information about relay selection via a timing side-channel attack.
How severe is CVE-2012-3519?
CVE-2012-3519 has a CVSS 2.0 base score of 5.0, rated medium severity.
Is CVE-2012-3519 being actively exploited?
It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (82nd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2012-3519?
CVE-2012-3519 affects Tor. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2012-3519?
Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2012-3519 published?
CVE-2012-3519 was published on 2012-08-26 and last updated on 2026-06-16.

References

Affected products (1)

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