CVE-2018-16875

Severity: high (CVSS 7.5 v3.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 6.4% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2018-12-14 · updated 2026-06-17
Weakness: CWE-20

Description

The crypto/x509 package of Go before 1.10.6 and 1.11.x before 1.11.3 does not limit the amount of work performed for each chain verification, which might allow attackers to craft pathological inputs leading to a CPU denial of service. Go TLS servers accepting client certificates and TLS clients are affected.

Affected products

Go: before 1.10.6; from 1.11.0 before 1.11.3 — fixed in 1.10.6, 1.11.3
openSUSE Leap: 42.3

How to fix

Upgrade to a fixed version: Go 1.10.6, 1.11.3. Check the vendor advisory for mitigations.

References

http://lists.opensuse.org/opensuse-security-announce/2019-03/msg00044.html
http://lists.opensuse.org/opensuse-security-announce/2019-05/msg00060.html
http://lists.opensuse.org/opensuse-security-announce/2019-06/msg00011.html
http://lists.opensuse.org/opensuse-security-announce/2019-06/msg00015.html
http://lists.opensuse.org/opensuse-security-announce/2019-07/msg00010.html
http://www.securityfocus.com/bid/106230
https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2018-16875
https://groups.google.com/forum/?pli=1#%21topic/golang-announce/Kw31K8G7Fi0
https://security.gentoo.org/glsa/201812-09
http://lists.opensuse.org/opensuse-security-announce/2019-03/msg00044.html
http://lists.opensuse.org/opensuse-security-announce/2019-05/msg00060.html
http://lists.opensuse.org/opensuse-security-announce/2019-06/msg00011.html

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