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CVE-2019-17263

3.3 · LOW

In libyal libfwsi before 20191006, libfwsi_extension_block_copy_from_byte_stream in libfwsi_extension_block.c has a heap-based buffer over-read because rejection of an unsupported size only conside…

Published Oct 6, 2019CWE-125EPSS 0.54%

Overview

CVE-2019-17263 is a low-severity vulnerability. It was published on October 6, 2019 and has a CVSS 3.1 base score of 3.3 (LOW).

This vulnerability has a CVSS 3.1 base score of 3.3, rated LOW. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

Technical description

In libyal libfwsi before 20191006, libfwsi_extension_block_copy_from_byte_stream in libfwsi_extension_block.c has a heap-based buffer over-read because rejection of an unsupported size only considers values less than 6, even though values of 6 and 7 are also unsupported. NOTE: the vendor has disputed this as described in the GitHub issue

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

Refpacketstormsecurity.com/files/154774/libyal-libfwsi-Buffer-Overread.htmlGitHubgithub.com/libyal/libfwsi/compare/20181227...20191006GitHubgithub.com/libyal/libfwsi/issues/13Refpacketstormsecurity.com/files/154774/libyal-libfwsi-Buffer-Overread.htmlGitHubgithub.com/libyal/libfwsi/compare/20181227...20191006GitHubgithub.com/libyal/libfwsi/issues/13

How CyberStrike helps

Frequently asked questions

What is CVE-2019-17263?

CVE-2019-17263 is a low-severity vulnerability. It was published on October 6, 2019 and has a CVSS 3.1 base score of 3.3 (LOW).

How severe is CVE-2019-17263?

This vulnerability has a CVSS 3.1 base score of 3.3, rated LOW. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

How do I fix or remediate CVE-2019-17263?

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-2019-17263?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2019-17263 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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