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CVE-2017-16803

7.5 · HIGH

In Libav through 11.11 and 12.x through 12.1, the smacker_decode_tree function in libavcodec/smacker.c does not properly restrict tree recursion, which allows remote attackers to cause a denial of…

Published Nov 13, 2017CWE-119EPSS 3.01%

Overview

CVE-2017-16803 is a high-severity vulnerability. It was published on November 13, 2017 and has a CVSS 3.0 base score of 7.5 (HIGH).

This vulnerability has a CVSS 3.0 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

In Libav through 11.11 and 12.x through 12.1, the smacker_decode_tree function in libavcodec/smacker.c does not properly restrict tree recursion, which allows remote attackers to cause a denial of service (bitstream.c:build_table() out-of-bounds read and application crash) via a crafted Smacker stream.

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/101882Refbugzilla.libav.org/show_bug.cgi?id=1098GitHubgithub.com/libav/libav/commit/cd4663dc80323ba64989d0c103d51ad3ee0e9c2fRefsecurity.gentoo.org/glsa/201811-19Refwww.debian.org/security/2018/dsa-4119Refwww.securityfocus.com/bid/101882Refbugzilla.libav.org/show_bug.cgi?id=1098GitHubgithub.com/libav/libav/commit/cd4663dc80323ba64989d0c103d51ad3ee0e9c2fRefsecurity.gentoo.org/glsa/201811-19Refwww.debian.org/security/2018/dsa-4119

How CyberStrike helps

Frequently asked questions

What is CVE-2017-16803?

CVE-2017-16803 is a high-severity vulnerability. It was published on November 13, 2017 and has a CVSS 3.0 base score of 7.5 (HIGH).

How severe is CVE-2017-16803?

This vulnerability has a CVSS 3.0 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-2017-16803?

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-2017-16803?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2017-16803 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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