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CVE-2019-3823

4.3 · MEDIUM

libcurl versions from 7.34.0 to before 7.64.0 are vulnerable to a heap out-of-bounds read in the code handling the end-of-response for SMTP.

Published Feb 6, 2019CWE-125EPSS 4.12%

Overview

CVE-2019-3823 is a medium-severity vulnerability. It was published on February 6, 2019 and has a CVSS 3.0 base score of 4.3 (MEDIUM).

This vulnerability has a CVSS 3.0 base score of 4.3, rated MEDIUM. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

Technical description

libcurl versions from 7.34.0 to before 7.64.0 are vulnerable to a heap out-of-bounds read in the code handling the end-of-response for SMTP. If the buffer passed to `smtp_endofresp()` isn't NUL terminated and contains no character ending the parsed number, and `len` is set to 5, then the `strtol()` call reads beyond the allocated buffer. The read contents will not be returned to the caller.

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/106950Refaccess.redhat.com/errata/RHSA-2019:3701Refbugzilla.redhat.com/show_bug.cgi?id=CVE-2019-3823Refcert-portal.siemens.com/productcert/pdf/ssa-936080.pdfRefcurl.haxx.se/docs/CVE-2019-3823.htmlReflists.apache.org/thread.html/8338a0f605bdbb3a6098bb76f666a95fc2b2f53f37fa1ecc89f1146f%40%3Cdevnull.infra.apache.org%3ERefsecurity.gentoo.org/glsa/201903-03Refsecurity.netapp.com/advisory/ntap-20190315-0001/Refusn.ubuntu.com/3882-1/Refwww.debian.org/security/2019/dsa-4386

How CyberStrike helps

Frequently asked questions

What is CVE-2019-3823?

CVE-2019-3823 is a medium-severity vulnerability. It was published on February 6, 2019 and has a CVSS 3.0 base score of 4.3 (MEDIUM).

How severe is CVE-2019-3823?

This vulnerability has a CVSS 3.0 base score of 4.3, rated MEDIUM. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2019-3823?

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-2019-3823?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2019-3823 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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