CVE-2018-16839

Name: CVE-2018-16839
Creator: NVD / NIST
Published: 2018-10-31T18:29:00.23+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

UnknownEPSS 5.83%

Last modified Jun 17, 2026

CVE-2018-16839 is a vulnerability of currently unknown severity. Curl versions 7.33.0 through 7.61.1 are vulnerable to a buffer overrun in the SASL authentication code that may lead to denial of service.. EPSS estimates a 5.83% chance of exploitation in the next 30 days.

Description

Curl versions 7.33.0 through 7.61.1 are vulnerable to a buffer overrun in the SASL authentication code that may lead to denial of service.

Metrics

EPSS Probability

5.83%

92.2th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Haxx	Curl	>= 7.33.0, <= 7.61.1
Debian	Debian Linux	8.0
Debian	Debian Linux	9.0
Canonical	Ubuntu Linux	14.04
Canonical	Ubuntu Linux	16.04
Canonical	Ubuntu Linux	18.04
Canonical	Ubuntu Linux	18.10

References

http://www.securitytracker.com/id/1042012Third Party Advisory, VDB Entry
https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2018-16839Issue Tracking, Third Party Advisory
https://curl.haxx.se/docs/CVE-2018-16839.htmlPatch, Vendor Advisory
https://github.com/curl/curl/commit/f3a24d7916b9173c69a3e0ee790102993833d6c5Patch, Third Party Advisory
https://lists.apache.org/thread.html/8338a0f605bdbb3a6098bb76f666a95fc2b2f53f37fa1ecc89f1146f%40%3Cdevnull.infra.apache.org%3E
https://lists.debian.org/debian-lts-announce/2018/11/msg00005.htmlMailing List, Third Party Advisory
https://security.gentoo.org/glsa/201903-03Third Party Advisory
https://usn.ubuntu.com/3805-1/Third Party Advisory
https://www.debian.org/security/2018/dsa-4331Third Party Advisory
http://www.securitytracker.com/id/1042012Third Party Advisory, VDB Entry
https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2018-16839Issue Tracking, Third Party Advisory
https://curl.haxx.se/docs/CVE-2018-16839.htmlPatch, Vendor Advisory
https://github.com/curl/curl/commit/f3a24d7916b9173c69a3e0ee790102993833d6c5Patch, Third Party Advisory
https://lists.apache.org/thread.html/8338a0f605bdbb3a6098bb76f666a95fc2b2f53f37fa1ecc89f1146f%40%3Cdevnull.infra.apache.org%3E
https://lists.debian.org/debian-lts-announce/2018/11/msg00005.htmlMailing List, Third Party Advisory
https://security.gentoo.org/glsa/201903-03Third Party Advisory
https://usn.ubuntu.com/3805-1/Third Party Advisory
https://www.debian.org/security/2018/dsa-4331Third Party Advisory

Timeline

Published: Oct 31, 2018
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2018-16839?

Curl versions 7.33.0 through 7.61.1 are vulnerable to a buffer overrun in the SASL authentication code that may lead to denial of service.

How severe is CVE-2018-16839?

Severity scoring for CVE-2018-16839 is pending analysis. The EPSS model estimates a 5.83% probability of exploitation in the next 30 days.

How do I fix CVE-2018-16839?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2018-16839?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST