CVE-2017-0375

Severity: high (CVSS 7.5 v3.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 2.6% 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 relay_send_end_cell_from_edge_ function via a malformed BEGIN cell.

Affected products

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.securityfocus.com/bid/99017
https://github.com/torproject/tor/commit/79b59a2dfcb68897ee89d98587d09e55f07e68d7
https://lists.torproject.org/pipermail/tor-announce/2017-June/000131.html
https://trac.torproject.org/projects/tor/ticket/22493
http://www.securityfocus.com/bid/99017
https://github.com/torproject/tor/commit/79b59a2dfcb68897ee89d98587d09e55f07e68d7
https://lists.torproject.org/pipermail/tor-announce/2017-June/000131.html
https://trac.torproject.org/projects/tor/ticket/22493

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