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CVE-2018-16890

7.5 · HIGH

libcurl versions from 7.36.0 to before 7.64.0 is vulnerable to a heap buffer out-of-bounds read.

Published Feb 6, 2019CWE-125EPSS 5.35%

Overview

CVE-2018-16890 is a high-severity vulnerability. It was published on February 6, 2019 and has a CVSS 3.1 base score of 7.5 (HIGH).

This vulnerability has a CVSS 3.1 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

libcurl versions from 7.36.0 to before 7.64.0 is vulnerable to a heap buffer out-of-bounds read. The function handling incoming NTLM type-2 messages (`lib/vauth/ntlm.c:ntlm_decode_type2_target`) does not validate incoming data correctly and is subject to an integer overflow vulnerability. Using that overflow, a malicious or broken NTLM server could trick libcurl to accept a bad length + offset combination that would lead to a buffer read out-of-bounds.

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.securityfocus.com/bid/106947Refaccess.redhat.com/errata/RHSA-2019:3701Refbugzilla.redhat.com/show_bug.cgi?id=CVE-2018-16890Refcert-portal.siemens.com/productcert/pdf/ssa-436177.pdfRefcurl.haxx.se/docs/CVE-2018-16890.htmlReflists.apache.org/thread.html/8338a0f605bdbb3a6098bb76f666a95fc2b2f53f37fa1ecc89f1146f%40%3Cdevnull.infra.apache.org%3ERefsecurity.netapp.com/advisory/ntap-20190315-0001/Refsupport.f5.com/csp/article/K03314397?utm_source=f5support&amp%3Butm_medium=RSSRefusn.ubuntu.com/3882-1/Refwww.debian.org/security/2019/dsa-4386

How CyberStrike helps

Frequently asked questions

What is CVE-2018-16890?

CVE-2018-16890 is a high-severity vulnerability. It was published on February 6, 2019 and has a CVSS 3.1 base score of 7.5 (HIGH).

How severe is CVE-2018-16890?

This vulnerability has a CVSS 3.1 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-2018-16890?

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-2018-16890?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2018-16890 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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