PT-2020-16310 · Md4C · Md4C

Fcambus · Published 2020-09-29 · Updated 2020-10-09 · CVE-2020-26148

Positive Technologies (AI Summary)

CVSS v3.1

7.5

High

Base vector

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

Name of the Vulnerable Software and Affected Versions md4c version 0.4.5

Description The issue allows attackers to trigger the use of uninitialized memory and cause a denial of service, such as an assertion failure, via a malformed Markdown document. This is due to a problem in the md push block bytes function in md4c.c.

Recommendations For md4c version 0.4.5, consider avoiding the use of the md push block bytes function until a patch is available. As a temporary workaround, restrict the processing of malformed Markdown documents to minimize the risk of exploitation. At the moment, there is no information about a newer version that contains a fix for this issue.

Exploit

Fix

Use of Uninitialized Resource

Weakness Enumeration

CWE-908

Related Identifiers

CVE-2020-26148

Affected Products

Md4C

References · 9

• 🔥 https://github.com/mity/md4c/issues/130 · Exploit
• https://osv.dev/vulnerability/UBUNTU-CVE-2020-26148 · Vendor Advisory
• https://ubuntu.com/security/CVE-2020-26148 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2020-26148 · Security Note
• https://cve.org/CVERecord?id=CVE-2020-26148 · Security Note
• https://osv.dev/vulnerability/DEBIAN-CVE-2020-26148 · Vendor Advisory
• https://security-tracker.debian.org/tracker/CVE-2020-26148 · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2020-26148 · Vendor Advisory
• https://github.com/mity/md4c/commit/22ca89a3008966c4316d6b0a158b1a49f9038df0 · Note