CVEvulnerability
CVE-2016-20047
8.6 HIGH
Official page ↗
- Status
- Awaiting Analysis
- Published
- 2026-03-28
- Last modified
- 2026-06-17
- Assigner
- [email protected]
- CVSS 4.0 ([email protected])
- 8.6 HIGH — CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
- CVSS 3.1 ([email protected])
- 8.4 HIGH — CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- Weaknesses
- CWE-787
Description
EKG Gadu 1.9~pre+r2855-3+b1 contains a local buffer overflow vulnerability in the username handling that allows local attackers to execute arbitrary code by supplying an oversized username string. Attackers can trigger the overflow in the strlcpy function by passing a crafted buffer exceeding 258 bytes to overwrite the instruction pointer and execute shellcode with user privileges.
Related
Weakness · CWE (1)
- CWE-787 Out-of-bounds Write weakness
References
- http://ekg.chmurka.net/ ekg.chmurka.net
- https://www.exploit-db.com/exploits/40392 www.exploit-db.com
- https://www.vulncheck.com/advisories/ekg-gadu-local-buffer-overflow-via-username-parameter www.vulncheck.com