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CVE-2017-9502

5.3 · MEDIUM

In curl before 7.54.1 on Windows and DOS, libcurl's default protocol function, which is the logic that allows an application to set which protocol libcurl should attempt to use when given a URL wit…

Published Jun 14, 2017CWE-119EPSS 3.29%

Overview

CVE-2017-9502 is a medium-severity vulnerability. It was published on June 14, 2017 and has a CVSS 3.0 base score of 5.3 (MEDIUM).

This vulnerability has a CVSS 3.0 base score of 5.3, rated MEDIUM. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

Technical description

In curl before 7.54.1 on Windows and DOS, libcurl's default protocol function, which is the logic that allows an application to set which protocol libcurl should attempt to use when given a URL without a scheme part, had a flaw that could lead to it overwriting a heap based memory buffer with seven bytes. If the default protocol is specified to be FILE or a file: URL lacks two slashes, the given "URL" starts with a drive letter, and libcurl is built for Windows or DOS, then libcurl would copy the path 7 bytes off, so that the end of the given path would write beyond the malloc buffer (7 bytes being the length in bytes of the ascii string "file://").

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

Refopenwall.com/lists/oss-security/2017/06/14/1Refwww.securityfocus.com/bid/99120Refwww.securitytracker.com/id/1038697Refcurl.haxx.se/docs/adv_20170614.htmlRefopenwall.com/lists/oss-security/2017/06/14/1Refwww.securityfocus.com/bid/99120Refwww.securitytracker.com/id/1038697Refcurl.haxx.se/docs/adv_20170614.html

How CyberStrike helps

Frequently asked questions

What is CVE-2017-9502?

CVE-2017-9502 is a medium-severity vulnerability. It was published on June 14, 2017 and has a CVSS 3.0 base score of 5.3 (MEDIUM).

How severe is CVE-2017-9502?

This vulnerability has a CVSS 3.0 base score of 5.3, 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-2017-9502?

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-2017-9502?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2017-9502 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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