CVE-2023-28503Public exploitNetwork attack vector

Root command execution via deterministic local credentials

Published Mar 29, 2023 · Updated Feb 18, 2025

Authentication bypass in Rocket Software UniData and UniVerse on Linux allows remote attackers to execute operating system commands as root. The libunidata.so do_log_on_user() function accepts the hard-coded :local: username and derives its password from a chosen Linux account's name, UID, and GID instead of performing PAM authentication. The default UniRPC service is remotely reachable on TCP port 31438, and udadmin's intended OsCommand operation turns the bypass into root command execution.

CVSS severity9.8
Critical
EPSS probability62.14%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Authentication bypass in Rocket Software UniData and UniVerse on Linux allows remote attackers to execute operating system commands as root. The libunidata.so do_log_on_user() function accepts the hard-coded :local: username and derives its password from a chosen Linux account's name, UID, and GID instead of performing PAM authentication. The default UniRPC service is remotely reachable on TCP port 31438, and udadmin's intended OsCommand operation turns the bypass into root command execution.

The record

CVE
CVE-2023-28503
Published
Mar 29, 2023
Updated
Feb 18, 2025
Vendor
Rocket Software
Product
UniData
Classifications
CWE-287, CWE-798, T1078.001
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 <8.2.43.3003

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Rocket Software · UniDataversion=0 <8.2.43.3003
Rocket Software · UniVerseversion=0 <11.3.5.1001; version=0 <12.2.1.2002

Published CVSS scores

9.8NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
9.8CISA-ADPCVSS: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 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-287Improper Authentication
CWE-798Use of Hard-coded Credentials
T1078.001Valid Accounts: Default Accounts

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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