CVE-2023-28501Public exploitNetwork attack vector

Root code execution via overflowed RPC length

Published Mar 29, 2023 · Updated Feb 18, 2025

Heap overflow in Rocket Software UniData before 8.2.4.3003 and affected UniVerse releases allows remote attackers to execute code as root via UniRPC. An overflowing RPC body-length field causes uvrpc_read_message() to use a wrapped length while receiving attacker-controlled packet data into heap memory. The default Linux daemon listens on TCP port 31438 without authentication, and successful corruption runs in the root process; Windows is unaffected.

CVSS severity9.8
Critical
EPSS probability1.42%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Heap overflow in Rocket Software UniData before 8.2.4.3003 and affected UniVerse releases allows remote attackers to execute code as root via UniRPC. An overflowing RPC body-length field causes uvrpc_read_message() to use a wrapped length while receiving attacker-controlled packet data into heap memory. The default Linux daemon listens on TCP port 31438 without authentication, and successful corruption runs in the root process; Windows is unaffected.

The record

CVE
CVE-2023-28501
Published
Mar 29, 2023
Updated
Feb 18, 2025
Vendor
Rocket Software
Product
UniData
Classifications
CWE-190, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Mar 29, 2023CVE publishedPublication date reported by the CVE source.
  2. Feb 18, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

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

  1. Affected versionversion=0 <8.2.4.3003

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Rocket Software · UniDataversion=0 <8.2.4.3003
Rocket Software · UniVerseversion=0 <11.3.5.1001; version=0 <12.2.1.2002

Published CVSS scores

9.8CISA-ADPCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
9.8NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/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.

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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
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-190Integer Overflow or Wraparound
T1190Exploit Public-Facing Application

Public exploit references

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

Technologies

Your stack

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Your stack

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