CVE-2016-20046

zFTP Client 20061220+dfsg3-4.1 contains a buffer overflow vulnerability in the NAME parameter handling of FTP connections that allows local attackers to crash the application or execute arbitrary code. Attackers can supply an oversized NAME value exceeding the 80-byte buffer allocated in strcpy_chk to overwrite the instruction pointer and execute shellcode with user privileges.

Score

CVSS 4.0 8.6 High

Status

Deferred - disclosure@vulncheck.com

Published

2026-03-28

Last modified

2026-04-01

Weaknesses

CWE-787

Affected products

• Zftp Client (Zftp)

References

• http://cernlib.web.cern.ch/cernlib/
• https://www.exploit-db.com/exploits/40203
• https://www.vulncheck.com/advisories/zftp-client-20061220-dfsg3-local-buffer-overflow