PT-2021-23857 · Teeworlds+1 · Teeworlds+1

Mmmds · Published 2021-12-15 · Updated 2022-10-26 · CVE-2021-43518

Positive Technologies (AI Summary)

CVSS v3.1

7.8

High

Base vector

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

Name of the Vulnerable Software and Affected Versions Teeworlds versions up to and including 0.7.5

Description The issue arises from a map parser that does not validate the m Channels value coming from a map file, leading to a buffer overflow. A malicious server can offer a specially crafted map that will overwrite the client's stack, causing denial of service or code execution.

Recommendations For Teeworlds versions up to and including 0.7.5, as a temporary workaround, consider disabling the map parser function until a patch is available. Restrict access to malicious servers to minimize the risk of exploitation. Avoid using maps from untrusted sources until the issue is resolved. At the moment, there is no information about a newer version that contains a fix for this vulnerability.

Exploit

DoS

Buffer Overflow

Weakness Enumeration

CWE-120

Related Identifiers

CVE-2021-43518

MGASA-2022-0292

Affected Products

Debian

Teeworlds

References · 16

• 🔥 https://github.com/teeworlds/teeworlds/issues/2981 · Exploit
• 🔥 https://mmmds.pl/fuzzing-map-parser-part-1-teeworlds · Exploit
• https://osv.dev/vulnerability/DEBIAN-CVE-2021-43518 · Vendor Advisory
• https://osv.dev/vulnerability/MGASA-2022-0292 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2021-43518 · Security Note
• https://osv.dev/vulnerability/CVE-2021-43518 · Vendor Advisory
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/JIYZ7EVY6NZBM7FQF6GVUARYO6MKSEAT · Vendor Advisory
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/OS2LI2RHQNUKUT3FKWYHRC27PLRWCHMZ · Vendor Advisory
• https://cve.org/CVERecord?id=CVE-2021-43518 · Security Note
• https://lists.fedoraproject.org/archives/list/[e-mail]/thread/JIYZ7EVY6NZBM7FQF6GVUARYO6MKSEAT · Vendor Advisory
• https://security-tracker.debian.org/tracker/CVE-2021-43518 · Vendor Advisory
• https://advisories.mageia.org/MGASA-2022-0292.html · Security Note
• https://osv.dev/vulnerability/UBUNTU-CVE-2021-43518 · Vendor Advisory
• https://ubuntu.com/security/CVE-2021-43518 · Vendor Advisory
• https://t.me/cibsecurity/34026 · Telegram Post