Bug#1009070: teeworlds: CVE-2021-43518: stack base buffer overflow while loading map in CMapLayers::LoadEnvPoints

[Salvatore Bonaccorso]

Source: teeworlds
Version: 0.7.5-1
Severity: important
Tags: security upstream
Forwarded: https://github.com/teeworlds/teeworlds/issues/2981
X-Debbugs-Cc: carnil at debian.org, Debian Security Team <team at security.debian.org>
Control: found -1 0.7.2-5+deb10u1
Control: found -1 0.7.2-5

Hi,

The following vulnerability was published for teeworlds.

CVE-2021-43518[0]:
| Teeworlds up to and including 0.7.5 is vulnerable to Buffer Overflow.
| A map parser does not validate m_Channels value coming from a map
| file, leading to a buffer overflow. A malicious server may offer a
| specially crafted map that will overwrite client's stack causing
| denial of service or code execution.


If you fix the vulnerability please also make sure to include the
CVE (Common Vulnerabilities & Exposures) id in your changelog entry.

For further information see:

[0] https://security-tracker.debian.org/tracker/CVE-2021-43518
    https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-43518
[1] https://github.com/teeworlds/teeworlds/issues/2981

Please adjust the affected versions in the BTS as needed.

Regards,
Salvatore