PT-2018-2642 · Gnu+2 · Gnu Libextractor+2

Published 2018-12-24 · Updated 2020-11-23 · CVE-2018-20431

Positive Technologies (AI Summary)

CVSS v3.1

6.5

Medium

Base vector

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

Name of the Vulnerable Software and Affected Versions GNU Libextractor versions prior to 1.9

Description The issue is related to a NULL Pointer Dereference in the process metadata() function, located in the ole2 extractor.c file. This can be exploited by a remote attacker using a specially crafted OLE file, potentially leading to a denial of service or memory content disclosure.

Recommendations For GNU Libextractor versions prior to 1.9, consider updating to version 1.9 or later to resolve the issue. As a temporary workaround, consider restricting the use of the ole2 extractor.c plugin to minimize the risk of exploitation.

Exploit

Fix

NULL Pointer Dereference

Weakness Enumeration

CWE-476

Related Identifiers

ALT-PU-2019-1218

BDU:2019-01259

CVE-2018-20431

DLA-1616-1

DSA-4361-1

MGASA-2019-0013

USN-4641-1

Affected Products

Alt Linux

Gnu Libextractor

Ubuntu

References · 33

• 🔥 https://gnunet.org/bugs/view.php?id=5494 · Exploit
• https://osv.dev/vulnerability/UBUNTU-CVE-2018-20431 · Vendor Advisory
• https://debian.org/security/2018/dsa-4361 · Vendor Advisory
• https://ubuntu.com/security/CVE-2017-17440 · Vendor Advisory
• https://ubuntu.com/security/CVE-2017-15266 · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2018-20431 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2018-20431 · Security Note
• https://ubuntu.com/security/CVE-2017-15602 · Vendor Advisory
• https://osv.dev/vulnerability/USN-4641-1 · Vendor Advisory
• https://ubuntu.com/security/CVE-2017-15922 · Vendor Advisory
• https://ubuntu.com/security/CVE-2018-14347 · Vendor Advisory
• https://osv.dev/vulnerability/MGASA-2019-0013 · Vendor Advisory
• https://osv.dev/vulnerability/DLA-1616-1 · Vendor Advisory
• https://ubuntu.com/security/CVE-2017-15600 · Vendor Advisory
• https://ubuntu.com/security/CVE-2018-20431 · Vendor Advisory