CVE-2022-31135Network attack vector

Server crash via off-by-one evidence index

Published Jul 7, 2022 · Updated Apr 23, 2025

Improper array-index validation in Attorney Online Akashi 1.3 and earlier allows remote authenticated users to crash the server. AOClient::pktEditEvidence and AOClient::pktRemoveEvidence accept an evidence index equal to the list size, then pass that out-of-range index to replacement or deletion operations. A connected user able to submit evidence-editing packets can terminate the server process, interrupting service for all clients.

CVSS severity6.5
Medium
EPSS probability0.92%
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

Improper array-index validation in Attorney Online Akashi 1.3 and earlier allows remote authenticated users to crash the server. AOClient::pktEditEvidence and AOClient::pktRemoveEvidence accept an evidence index equal to the list size, then pass that out-of-range index to replacement or deletion operations. A connected user able to submit evidence-editing packets can terminate the server process, interrupting service for all clients.

The record

CVE
CVE-2022-31135
Published
Jul 7, 2022
Updated
Apr 23, 2025
Vendor
Attorney Online
Product
Akashi
Classifications
CWE-129, T1499.004
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Jul 7, 2022CVE publishedPublication date reported by the CVE source.
  2. Apr 23, 2025Record 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=< 1.4

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Attorney Online · Akashiversion=< 1.4

Published CVSS scores

6.5GitHub, Inc.CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
7.5NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
7.8NIST NVDAV:N/AC:L/Au:N/C:N/I:N/A:C

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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-129Improper Validation of Array Index
T1499.004Application or System Exploitation

Public exploit references

No public exploit references are available in this record.

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