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Vulnerability record · CVE-2017-8816 · published 29 November 2017

CVE-2017-8816: Haxx curl integer overflow vulnerability

Haxx · Curl

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.

9.8 CVSS 3.1 Critical EPSS 8.5% · top 5.1% CWE-190 · Integer overflow
9.8CVSS 3.1 base score, v2 7.5
8.5%EPSS exploitation probability, 30 days
NoNot in CISA KEV
3Affected product versions listed by NVD
16References
17 Jun 2026Last modified by NVD

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.

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

Affected products

3 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

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

Track CVE-2017-8816 inside VULONE

Watch it alongside the ransomware crews, C2 infrastructure and forum chatter that reference it, query it through the API and pull it into your SIEM over TAXII.

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Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2017-8816), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.