CVE-2016-20047
HIGH EPSS 4.6%
Published Mar 28, 20263mo ago · Modified Jun 17, 20261w ago
8.6 CVSS 4.0
Published Mar 28, 2026 3mo ago
Last Modified Jun 17, 2026 1w ago
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.
CVSS Details
Base Score
Exploitability
Impact
Vector string
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 Attack Vector Local
Attack Complexity Low
Privileges Required None
User Interaction None
Scope X
Threat Intelligence
EPSS Exploit Probability
4.6% percentile
Exploit & Patch Status
No Known Exploit
No Patch Available
Weaknesses 1
CWE-787 Out-of-bounds Write Memory Safety
References 3
- ekg.chmurka.net http://ekg.chmurka.net/
- exploit-db.com https://www.exploit-db.com/exploits/40392
- vulncheck.com https://www.vulncheck.com/advisories/ekg-gadu-local-buffer-overflow-via-username-parameter
Remediation
No remediation data recorded yet
Check vendor advisories and the NVD entry for patch availability.