CVE-2018-25285

MEDIUM

Fathom 2.4 Denial of Service via Authorization Code Buffer Overflow

Title source: cna
STIX 2.1

Exploitation Summary

EIP tracks 1 public exploit for CVE-2018-25285. PoCs published by Gionathan Reale.

AI-analyzed exploit summary This PoC exploits a buffer overflow vulnerability in Fathom 2.4 by generating a 6000-byte payload of 'A' characters. When pasted into the 'Authorization Code' field, it triggers a denial-of-service (DoS) condition, causing the application to crash.

Description

Fathom 2.4 contains a buffer overflow vulnerability in the Authorization Code field that allows local attackers to crash the application by submitting an oversized input string. Attackers can paste a 6000-byte payload into the Authorization Code field and click Activate to trigger a denial of service condition.

Exploits (1)

exploitdb WORKING POC VERIFIED
by Gionathan Reale · pythondoswindows_x86
https://www.exploit-db.com/exploits/45294

This PoC exploits a buffer overflow vulnerability in Fathom 2.4 by generating a 6000-byte payload of 'A' characters. When pasted into the 'Authorization Code' field, it triggers a denial-of-service (DoS) condition, causing the application to crash.

Classification
Working Poc 90%
Attack Type
Dos
Complexity
Trivial
Reliability
Reliable
Target: Fathom v2.4
No auth needed
Prerequisites: Fathom 2.4 installed on target system · Access to the 'Authorization Code' input field
devstral-2 · analyzed Apr 26, 2026 Full analysis →

References (4)

Core 4
Core References
Exploit exploit
ExploitDB-45294
https://www.exploit-db.com/exploits/45294
Product product
Official Product Homepage
https://fathom.concord.org/
Product product
Product Reference
https://fathom.concord.org/download/
Third Party Advisory third-party-advisory
VulnCheck Advisory: Fathom 2.4 Denial of Service via Authorization Code Buffer Overflow
https://www.vulncheck.com/advisories/fathom-denial-of-service-via-authorization-code-buffer-overflow

Scores

CVSS v3 5.5
EPSS 0.0013
EPSS Percentile 2.9%
Attack Vector LOCAL
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

CISA SSVC

Vulnrichment
Exploitation poc
Automatable no
Technical Impact partial

Details

CWE
CWE-120
Status published
Products (1)
Fathom/Fathom 2.4
Published Apr 26, 2026
Tracked Since Apr 26, 2026