CVE-2016-20047 - CVE House
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Status published High CVE-2016-20047

EKG Gadu 1.9 Local Buffer Overflow via Username Parameter

Vulnerability 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.

Impact Analysis

Refer to official advisory for detailed impact metrics.

Remediation

Ensure systems are updated to the latest vendor-supplied patch levels.

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Credits & Attribution

The following person or organization is credited with identifying this vulnerability, as recorded in the NVD database:

  • Juan Sacco - http://www.exploitpack.com -

Affected Vendor

Affected Software

EKG Gadu
Vulnerable Versions:
1:1.9~pre+r2855-3+b1

Timeline

Official Publish: March 28th, 2026
Last Modified: March 30th, 2026
Added to House: July 20th, 2026

CVSS Vectors

V3: CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Weaknesses (CWE)