PT-2021-10983 · Unknown+1 · Cpp-Peglib+1

Seviezhou · Published 2021-04-21 · Updated 2021-04-26 · CVE-2020-23914

Positive Technologies (AI Summary)

CVSS v3.1

5.5

Medium

Base vector

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

Name of the Vulnerable Software and Affected Versions: cpp-peglib versions prior to 0.1.13

Description: An issue exists in the peg::AstOptimizer::optimize() function, located in peglib.h, which allows an attacker to cause Denial of Service due to a NULL pointer dereference.

Recommendations: For versions prior to 0.1.13, update to version 0.1.13 or later to resolve the issue. As a temporary workaround, consider restricting access to the optimize() function until a patch is available.

Exploit

Fix

DoS

NULL Pointer Dereference

Weakness Enumeration

CWE-476

Related Identifiers

CVE-2020-23914

Affected Products

Debian

Cpp-Peglib

References · 9

• 🔥 https://github.com/yhirose/cpp-peglib/issues/121 · Exploit
• https://github.com/yhirose/cpp-peglib/commit/0061f393de54cf0326621c079dc2988336d1ebb3 · Patch
• https://osv.dev/vulnerability/DEBIAN-CVE-2020-23914 · Vendor Advisory
• https://security-tracker.debian.org/tracker/CVE-2020-23914 · Vendor Advisory
• https://osv.dev/vulnerability/UBUNTU-CVE-2020-23914 · Vendor Advisory
• https://cve.org/CVERecord?id=CVE-2020-23914 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2020-23914 · Security Note
• https://osv.dev/vulnerability/CVE-2020-23914 · Vendor Advisory
• https://ubuntu.com/security/CVE-2020-23914 · Vendor Advisory