What’s Vulnerable › Vulnerabilities

CVE-2017-0376

• Severity: high (CVSS 7.5 v3.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 2.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2017-06-09 · updated 2026-06-17
• Weakness: CWE-617

Description

The hidden-service feature in Tor before 0.3.0.8 allows a denial of service (assertion failure and daemon exit) in the connection_edge_process_relay_cell function via a BEGIN_DIR cell on a rendezvous circuit.

Affected products

• Debian Linux: 8.0, 9.0
• torproject Tor: before 0.3.0.8 — fixed in 0.3.0.8

How to fix

Upgrade to a fixed version: torproject Tor 0.3.0.8. Check the vendor advisory for mitigations.

References

• http://www.debian.org/security/2017/dsa-3877
• https://github.com/torproject/tor/commit/56a7c5bc15e0447203a491c1ee37de9939ad1dcd
• https://lists.torproject.org/pipermail/tor-announce/2017-June/000131.html
• https://trac.torproject.org/projects/tor/ticket/22494
• http://www.debian.org/security/2017/dsa-3877
• https://github.com/torproject/tor/commit/56a7c5bc15e0447203a491c1ee37de9939ad1dcd
• https://lists.torproject.org/pipermail/tor-announce/2017-June/000131.html
• https://trac.torproject.org/projects/tor/ticket/22494

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