CVE-2017-17459

Severity: high (CVSS 8.8 v3.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 3.2% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2017-12-07 · updated 2026-06-17

Description

http_transport.c in Fossil before 2.4, when the SSH sync protocol is used, allows user-assisted remote attackers to execute arbitrary commands via an ssh URL with an initial dash character in the hostname, a related issue to CVE-2017-9800, CVE-2017-12836, CVE-2017-12976, CVE-2017-14176, CVE-2017-16228, CVE-2017-1000116, and CVE-2017-1000117.

Affected products

Fossil Scm Fossil: before 2.4 — fixed in 2.4

How to fix

Upgrade to a fixed version: Fossil Scm Fossil 2.4. Check the vendor advisory for mitigations.

References

https://bugzilla.opensuse.org/show_bug.cgi?id=1071709
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/BLAFCQGE7C5UMX75LESNUMKTXTURUVQM/
https://www.fossil-scm.org/xfer/doc/trunk/www/changes.wiki#v2_4
https://www.fossil-scm.org/xfer/info/1f63db591c77108c
https://bugzilla.opensuse.org/show_bug.cgi?id=1071709
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/BLAFCQGE7C5UMX75LESNUMKTXTURUVQM/
https://www.fossil-scm.org/xfer/doc/trunk/www/changes.wiki#v2_4
https://www.fossil-scm.org/xfer/info/1f63db591c77108c

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