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CVE-2025-34127

Achat v0.150 SEH Buffer Overflow via UDP

CVSS 9.3 CRITICALEPSS 1.1%CWE-121CWE-94
Vexday Risk Score
63High priority
SSVC decision (CISA)
Attend
PoC available → attend closely
CVSS 9.3EPSS 1.1%KEV nãoPoC públicaNuclei —Metasploit simPatch —
Lifecycle
18 Dec 2014Metasploit module available
16 Jul 2025Published on NVD
Recommendation: Plan a near-term fix — a public PoC already exists.
A stack-based buffer overflow exists in Achat v0.150 in its default configuration. By sending a specially crafted message to the UDP port 9256, an attacker can overwrite the structured exception handler (SEH) due to insufficient bounds checking on user-supplied input leading to remote code execution.
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
Affected products
Achat Software · Achat Chat Server
public PoCs found — 2
cve_referenceraw.githubusercontent.com/rapid7/metasploit-framework/master/modules/exploits/windows/misc/achat_bof.rbunverifiedcve_referencewww.exploit-db.com/exploits/36056unverified
⚠ Public resources, to assess the exposure of systems you control or are authorized to test. Test only with authorization.

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References
https://raw.githubusercontent.com/rapid7/metasploit-framework/master/modules/exploits/windows/misc/achat_bof.rbhttps://www.exploit-db.com/exploits/36056https://www.vulncheck.com/advisories/achat-seh-buffer-overflow