PT-2021-24159 · Toxcore+3 · Toxcore+3

Sudden6 · Published 2021-12-13 · Updated 2025-03-01 · CVE-2021-44847

Positive Technologies (AI Summary)

CVSS v3.1

9.8

Critical

Base vector

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

Name of the Vulnerable Software and Affected Versions: toxcore versions 0.1.9 through 0.1.11 toxcore versions 0.2.0 through 0.2.12

Description: A stack-based buffer overflow in the handle request function in DHT.c allows remote attackers to crash the process or potentially execute arbitrary code via a network packet. This issue is caused by an improper length calculation during the handling of received network packets. The vulnerability can be exploited by sending a specially crafted UDP packet, and all users of applications based on toxcore with UDP transport enabled are potentially affected.

Recommendations: For toxcore versions 0.1.9 through 0.1.11, update to a version outside of this range to resolve the issue. For toxcore versions 0.2.0 through 0.2.12, update to a version outside of this range to resolve the issue. As a temporary workaround, consider disabling the UDP transport to minimize the risk of exploitation.

Exploit

Fix

Weakness Enumeration

CWE-682

Related Identifiers

ALT-PU-2025-3455

CVE-2021-44847

MGASA-2021-0596

OPENSUSE-SU-2021:1640-1

OPENSUSE-SU-2021_1640-1

OPENSUSE-SU-2024:11846-1

Affected Products

Alt Linux

Debian

Suse

Toxcore

References · 24

• 🔥 https://github.com/TokTok/c-toxcore/pull/1718 · Exploit
• https://osv.dev/vulnerability/openSUSE-SU-2021:1640-1 · Vendor Advisory
• https://ubuntu.com/security/CVE-2021-44847 · Vendor Advisory
• https://cve.org/CVERecord?id=CVE-2021-44847 · Security Note
• https://osv.dev/vulnerability/CVE-2021-44847 · Vendor Advisory
• https://osv.dev/vulnerability/openSUSE-SU-2024:11846-1 · Vendor Advisory
• https://lists.fedoraproject.org/archives/list/[e-mail]/thread/S7EBS3NIRYJ7V3PTNINP3PJSVUHGZTGA · Vendor Advisory
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/S7EBS3NIRYJ7V3PTNINP3PJSVUHGZTGA · Vendor Advisory
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ZLTKINSPO5T65LB3ZASDPCREKUE22RYE · Vendor Advisory
• https://advisories.mageia.org/MGASA-2021-0596.html · Security Note
• https://security-tracker.debian.org/tracker/CVE-2021-44847 · Vendor Advisory
• https://osv.dev/vulnerability/DEBIAN-CVE-2021-44847 · Vendor Advisory
• https://osv.dev/vulnerability/MGASA-2021-0596 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2021-44847 · Security Note
• https://osv.dev/vulnerability/UBUNTU-CVE-2021-44847 · Vendor Advisory