PT-2019-15926 · Yabasic+1 · Yabasic+1

Fcambus · Published 2019-12-11 · Updated 2020-08-24 · CVE-2019-19720

Positive Technologies (AI Summary)

CVSS v3.1

8.8

High

Base vector

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

Name of the Vulnerable Software and Affected Versions Yabasic version 2.86.1

Description A heap-based buffer overflow issue exists in the yylex() function, located in flex.c, which can be triggered by a crafted BASIC source file.

Recommendations For Yabasic version 2.86.1, consider avoiding the use of crafted BASIC source files until a patch is available. As a temporary workaround, restrict the execution of potentially malicious BASIC source files 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

Memory Corruption

Weakness Enumeration

CWE-787

Related Identifiers

CVE-2019-19720

Affected Products

Debian

Yabasic

References · 9

• 🔥 https://github.com/marcIhm/yabasic/issues/36 · Exploit
• https://nvd.nist.gov/vuln/detail/CVE-2019-19720 · Security Note
• https://ubuntu.com/security/CVE-2019-19720 · Vendor Advisory
• https://osv.dev/vulnerability/DEBIAN-CVE-2019-19720 · Vendor Advisory
• http://yabasic.de/whatsnew.html · Vendor Advisory
• https://osv.dev/vulnerability/UBUNTU-CVE-2019-19720 · Vendor Advisory
• https://security-tracker.debian.org/tracker/CVE-2019-19720 · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2019-19720 · Vendor Advisory
• https://cve.org/CVERecord?id=CVE-2019-19720 · Security Note