CVE-2024-25398Public exploitNetwork attack vector

Proxy crash via unsupported SOCKS5 command

Published Feb 27, 2024 · Updated Aug 27, 2024

Denial of service in Bulkstream Srelay 0.4.8p3 allows remote attackers to crash the proxy with a malformed SOCKS5 request. The SOCKS5 request handler processes an unsupported command byte of 0x0c instead of rejecting it with a command-not-supported reply, terminating the server process. Unauthenticated network access to the listening proxy is sufficient; the documented effect is a service crash, not data disclosure or modification.

CVSS severity7.5
High
EPSS probability0.75%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Book a demo

Summary

What happened

Denial of service in Bulkstream Srelay 0.4.8p3 allows remote attackers to crash the proxy with a malformed SOCKS5 request. The SOCKS5 request handler processes an unsupported command byte of 0x0c instead of rejecting it with a command-not-supported reply, terminating the server process. Unauthenticated network access to the listening proxy is sufficient; the documented effect is a service crash, not data disclosure or modification.

The record

CVE
CVE-2024-25398
Published
Feb 27, 2024
Updated
Aug 27, 2024
Vendor
Bulkstream
Product
Srelay
Classifications
CWE-400, T1499
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Feb 27, 2024CVE publishedPublication date reported by the CVE source.
  2. Aug 27, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0.4.8p3

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Bulkstream · Srelayversion=0.4.8p3

Published CVSS scores

7.5CISA-ADPCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-400Uncontrolled Resource Consumption
T1499Endpoint Denial of Service

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

See the directory against your own environment.

Your stack

Check the software in your environment

Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.

Book a demo