CVE-2017-8816

Name: CVE-2017-8816
Creator: NVD / NIST
Published: 2017-11-29T18:29:00.3+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

CRITICALCVSS 9.8/10EPSS 8.52%

Last modified Jun 17, 2026

CVE-2017-8816 is a critical-severity vulnerability rated 9.8/10 on the CVSS scale. The NTLM authentication feature in curl and libcurl before 7.57.0 on 32-bit platforms allows attackers to cause a denial of service (integer overflow and resultant buffer overflow, and application crash) or possibly have unspecified other impact via vectors involving long user and password fields.. EPSS estimates a 8.52% chance of exploitation in the next 30 days.

Description

The NTLM authentication feature in curl and libcurl before 7.57.0 on 32-bit platforms allows attackers to cause a denial of service (integer overflow and resultant buffer overflow, and application crash) or possibly have unspecified other impact via vectors involving long user and password fields.

Metrics

CVSS 3.1

9.8/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS Probability

8.52%

94.4th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Haxx	Curl	> 7.36.0, <= 7.56.1
Haxx	Libcurl	>= 7.36.0, <= 7.56.1
Debian	Debian Linux	8.0
Debian	Debian Linux	9.0

References

http://security.cucumberlinux.com/security/details.php?id=161Third Party Advisory
http://www.securityfocus.com/bid/101998Third Party Advisory, VDB Entry
http://www.securitytracker.com/id/1039896Third Party Advisory, VDB Entry
http://www.securitytracker.com/id/1040608
https://access.redhat.com/errata/RHSA-2018:3558
https://curl.haxx.se/docs/adv_2017-12e7.htmlMitigation, Vendor Advisory
https://security.gentoo.org/glsa/201712-04Third Party Advisory
https://www.debian.org/security/2017/dsa-4051Third Party Advisory
http://security.cucumberlinux.com/security/details.php?id=161Third Party Advisory
http://www.securityfocus.com/bid/101998Third Party Advisory, VDB Entry
http://www.securitytracker.com/id/1039896Third Party Advisory, VDB Entry
http://www.securitytracker.com/id/1040608
https://access.redhat.com/errata/RHSA-2018:3558
https://curl.haxx.se/docs/adv_2017-12e7.htmlMitigation, Vendor Advisory
https://security.gentoo.org/glsa/201712-04Third Party Advisory
https://www.debian.org/security/2017/dsa-4051Third Party Advisory

Timeline

Published: Nov 29, 2017
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2017-8816?

How severe is CVE-2017-8816?

CVE-2017-8816 has a CVSS score of 9.8/10 (CRITICAL severity). The EPSS model estimates a 8.52% probability of exploitation in the next 30 days.

How do I fix CVE-2017-8816?

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-2017-8816?

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

Scan your code now

Source: NVD / NIST