CVE-2017-9544 in the critical feed json
There is a remote stack-based buffer overflow (SEH) in register.ghp in EFS Software Easy Chat Server versions 2.0 to 3.1.
published 2017-06-12 9 y ago modified 2026-06-17 4 mo ago also EUVD-2017-18475
- cvss
- 9.8
- version 3.1, NVD
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 24.1%
- EPSS 24.1% chance of exploitation in 30 days, percentile 97%
- public exploits
- 1
- Metasploit
Summary
There is a remote stack-based buffer overflow (SEH) in register.ghp in EFS Software Easy Chat Server versions 2.0 to 3.1. By sending an overly long username string to registresult.htm for registering the user, an attacker may be able to execute arbitrary code.
Timeline
- Published
- First public exploit (Metasploit exploit/windows/http/easychatserver_seh)
Exploit prediction
24.12% chance of exploitation in the next 30 days, higher than 97% of all scored CVEs (FIRST EPSS, 2026-11-09).
Exploits and checks
- Metasploit exploit/windows/http/easychatserver_seh Easy Chat Server User Registeration Buffer Overflow (SEH) metasploit exploit, normal rank, 2017-10-09
- exploit-db.com https://www.exploit-db.com/exploits/42155/ referenced PoC, tagged "exploit" by a source, unverified
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| NVD | 3.1 | 9.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
| NVD | 2.0 | 7.5 | AV:N/AC:L/Au:N/C:P/I:P/A:P |
Classification
- Weakness
-
- CWE-787 Out-of-bounds Write
References
-
exploit-db.com
/exploits/42155/
exploit, third-party-advisory, vdb-entry
Sources
- CVE List CVE-2017-9544
- NVD CVE-2017-9544
Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.