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CVE-2018-1000005

9.1 · CRITICAL

libcurl 7.49.0 to and including 7.57.0 contains an out bounds read in code handling HTTP/2 trailers.

Published Jan 24, 2018CWE-125EPSS 4.56%

Overview

CVE-2018-1000005 is a critical-severity vulnerability. It was published on January 24, 2018 and has a CVSS 3.0 base score of 9.1 (CRITICAL).

This vulnerability has a CVSS 3.0 base score of 9.1, rated CRITICAL. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

Technical description

libcurl 7.49.0 to and including 7.57.0 contains an out bounds read in code handling HTTP/2 trailers. It was reported (https://github.com/curl/curl/pull/2231) that reading an HTTP/2 trailer could mess up future trailers since the stored size was one byte less than required. The problem is that the code that creates HTTP/1-like headers from the HTTP/2 trailer data once appended a string like `:` to the target buffer, while this was recently changed to `: ` (a space was added after the colon) but the following math wasn't updated correspondingly. When accessed, the data is read out of bounds and causes either a crash or that the (too large) data gets passed to client write. This could lead to a denial-of-service situation or an information disclosure if someone has a service that echoes back or uses the trailers for something.

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/1040273Refaccess.redhat.com/errata/RHSA-2019:1543Refcurl.haxx.se/docs/adv_2018-824a.htmlGitHubgithub.com/curl/curl/pull/2231Refusn.ubuntu.com/3554-1/Refwww.debian.org/security/2018/dsa-4098Refwww.securitytracker.com/id/1040273Refaccess.redhat.com/errata/RHSA-2019:1543Refcurl.haxx.se/docs/adv_2018-824a.htmlGitHubgithub.com/curl/curl/pull/2231

How CyberStrike helps

Frequently asked questions

What is CVE-2018-1000005?

CVE-2018-1000005 is a critical-severity vulnerability. It was published on January 24, 2018 and has a CVSS 3.0 base score of 9.1 (CRITICAL).

How severe is CVE-2018-1000005?

This vulnerability has a CVSS 3.0 base score of 9.1, rated CRITICAL. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2018-1000005?

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-2018-1000005?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2018-1000005 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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