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CVE-2017-13090

8.8 · HIGH

The retr.c:fd_read_body() function is called when processing OK responses.

Published Oct 27, 2017CWE-122EPSS 36.56%

Overview

CVE-2017-13090 is a high-severity vulnerability. It was published on October 27, 2017 and has a CVSS 3.0 base score of 8.8 (HIGH).

This vulnerability has a CVSS 3.0 base score of 8.8, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

Technical description

The retr.c:fd_read_body() function is called when processing OK responses. When the response is sent chunked in wget before 1.19.2, the chunk parser uses strtol() to read each chunk's length, but doesn't check that the chunk length is a non-negative number. The code then tries to read the chunk in pieces of 8192 bytes by using the MIN() macro, but ends up passing the negative chunk length to retr.c:fd_read(). As fd_read() takes an int argument, the high 32 bits of the chunk length are discarded, leaving fd_read() with a completely attacker controlled length argument. The attacker can corrupt malloc metadata after the allocated buffer.

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

Refgit.savannah.gnu.org/cgit/wget.git/commit/?id=ba6b44f6745b14dce414761a8e4b35d31b176bbaRefwww.debian.org/security/2017/dsa-4008Refwww.securityfocus.com/bid/101590Refwww.securitytracker.com/id/1039661Refaccess.redhat.com/errata/RHSA-2017:3075Refsecurity.gentoo.org/glsa/201711-06Refwww.synology.com/support/security/Synology_SA_17_62_WgetRefwww.viestintavirasto.fi/en/cybersecurity/vulnerabilities/2017/haavoittuvuus-2017-037.htmlRefgit.savannah.gnu.org/cgit/wget.git/commit/?id=ba6b44f6745b14dce414761a8e4b35d31b176bbaRefwww.debian.org/security/2017/dsa-4008

How CyberStrike helps

Frequently asked questions

What is CVE-2017-13090?

CVE-2017-13090 is a high-severity vulnerability. It was published on October 27, 2017 and has a CVSS 3.0 base score of 8.8 (HIGH).

How severe is CVE-2017-13090?

This vulnerability has a CVSS 3.0 base score of 8.8, 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-2017-13090?

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-2017-13090?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2017-13090 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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