PT-2021-8849 · Toxcore+1 · Toxcore+1

Kpp · Published 2021-12-13 · Updated 2025-03-01 · CVE-2018-25021

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 toxcore versions prior to 0.2.8

Description The TCP Server module in toxcore does not free the TCP priority queue under certain conditions, allowing a remote attacker to exhaust the system's memory and cause a denial of service (DoS).

Recommendations For versions prior to 0.2.8, update to version 0.2.8 or later to resolve the issue. As a temporary workaround, consider restricting access to the TCP Server module to minimize the risk of exploitation.

Exploit

Fix

DoS

Improper Resource Release

Weakness Enumeration

CWE-404

Related Identifiers

ALT-PU-2025-3455

CVE-2018-25021

Affected Products

Alt Linux

Toxcore

References · 12

• 🔥 https://github.com/TokTok/c-toxcore/issues/1214 · Exploit
• https://ubuntu.com/security/CVE-2018-25021 · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2018-25021 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2018-25021 · Security Note
• https://security-tracker.debian.org/tracker/CVE-2018-25021 · Vendor Advisory
• https://cve.org/CVERecord?id=CVE-2018-25021 · Security Note
• https://osv.dev/vulnerability/DEBIAN-CVE-2018-25021 · Vendor Advisory
• https://osv.dev/vulnerability/UBUNTU-CVE-2018-25021 · Vendor Advisory
• https://github.com/TokTok/c-toxcore/pull/1216 · Note
• https://blog.tox.chat/2018/10/memory-leak-bug-and-new-toxcore-release-fixing-it · Note
• https://t.me/cvenotify/24561 · Telegram Post
• https://t.me/cibsecurity/33792 · Telegram Post