PT-2019-15050 · Libyal+1 · Libfwsi+1

Published 2019-10-06 · Updated 2024-08-05 · CVE-2019-17263

Positive Technologies (AI Summary)

CVSS v3.1

3.3

Low

Base vector

AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L

Name of the Vulnerable Software and Affected Versions libyal libfwsi versions prior to 20191006

Description The issue is related to a heap-based buffer over-read in the libfwsi extension block copy from byte stream function in libfwsi extension block.c. This occurs because the rejection of an unsupported size only considers values less than 6, even though values of 6 and 7 are also unsupported. The vendor has disputed this issue as described in the GitHub issue.

Recommendations For versions prior to 20191006, update to a version 20191006 or later to resolve the issue. As a temporary workaround, consider restricting the input to the libfwsi extension block copy from byte stream function to prevent exploitation.

Exploit

Fix

Out of bounds Read

Weakness Enumeration

CWE-125

Related Identifiers

CVE-2019-17263

Affected Products

Debian

Libfwsi

References · 13

• 🔥 https://github.com/libyal/libfwsi/issues/13 · Exploit
• 🔥 http://packetstormsecurity.com/files/154774/libyal-libfwsi-Buffer-Overread.html · Exploit
• https://github.com/libyal/libfwsi/compare/20181227...20191006 · Patch
• https://osv.dev/vulnerability/CVE-2019-17263 · Vendor Advisory
• https://ubuntu.com/security/CVE-2019-17263 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2019-17263 · Security Note
• https://security-tracker.debian.org/tracker/CVE-2019-17263 · Vendor Advisory
• https://cve.org/CVERecord?id=CVE-2019-17263 · Security Note
• https://osv.dev/vulnerability/DEBIAN-CVE-2019-17263 · Vendor Advisory
• https://osv.dev/vulnerability/UBUNTU-CVE-2019-17263 · Vendor Advisory
• https://github.com/libyal/libfwsi/commit/54afa5c71d6c795a555dbcb1e160fea393b98fb3 · Note
• https://t.me/cvenotify/89099 · Telegram Post
• https://t.me/cvenotify/83692 · Telegram Post