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CVE-2018-14618

7.5 · HIGH

curl before version 7.61.1 is vulnerable to a buffer overrun in the NTLM authentication code.

Published Sep 5, 2018CWE-122EPSS 11.12%

Overview

CVE-2018-14618 is a high-severity vulnerability. It was published on September 5, 2018 and has a CVSS 3.0 base score of 7.5 (HIGH).

This vulnerability has a CVSS 3.0 base score of 7.5, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

Technical description

curl before version 7.61.1 is vulnerable to a buffer overrun in the NTLM authentication code. The internal function Curl_ntlm_core_mk_nt_hash multiplies the length of the password by two (SUM) to figure out how large temporary storage area to allocate from the heap. The length value is then subsequently used to iterate over the password and generate output into the allocated storage buffer. On systems with a 32 bit size_t, the math to calculate SUM triggers an integer overflow when the password length exceeds 2GB (2^31 bytes). This integer overflow usually causes a very small buffer to actually get allocated instead of the intended very huge one, making the use of that buffer end up in a heap buffer overflow. (This bug is almost identical to CVE-2017-8816.)

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

Refwww.securitytracker.com/id/1041605Refaccess.redhat.com/errata/RHSA-2018:3558Refaccess.redhat.com/errata/RHSA-2019:1880Refbugzilla.redhat.com/show_bug.cgi?id=CVE-2018-14618Refcert-portal.siemens.com/productcert/pdf/ssa-436177.pdfRefcurl.haxx.se/docs/CVE-2018-14618.htmlRefpsirt.global.sonicwall.com/vuln-detail/SNWLID-2018-0014Refsecurity.gentoo.org/glsa/201903-03Refusn.ubuntu.com/3765-1/Refusn.ubuntu.com/3765-2/

How CyberStrike helps

Frequently asked questions

What is CVE-2018-14618?

CVE-2018-14618 is a high-severity vulnerability. It was published on September 5, 2018 and has a CVSS 3.0 base score of 7.5 (HIGH).

How severe is CVE-2018-14618?

This vulnerability has a CVSS 3.0 base score of 7.5, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2018-14618?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2018-14618?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2018-14618 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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