CVE-2023-28509Public exploitNetwork attack vector

Credential disclosure via reversible UniRPC obfuscation

Published Mar 29, 2023 · Updated Feb 18, 2025

Weak encryption in Rocket Software UniData and UniVerse for Linux allows remote attackers to recover credentials from UniRPC traffic. UniRPC XORs packet bodies with a header-disclosed constant and encodes passwords with reversible byte negation or small XOR keys; layered XOR can expose plaintext. Attackers must observe network traffic, and the demonstrated consequence is disclosure of transmitted passwords rather than data modification or service interruption.

CVSS severity7.5
High
EPSS probability0.28%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Weak encryption in Rocket Software UniData and UniVerse for Linux allows remote attackers to recover credentials from UniRPC traffic. UniRPC XORs packet bodies with a header-disclosed constant and encodes passwords with reversible byte negation or small XOR keys; layered XOR can expose plaintext. Attackers must observe network traffic, and the demonstrated consequence is disclosure of transmitted passwords rather than data modification or service interruption.

The record

CVE
CVE-2023-28509
Published
Mar 29, 2023
Updated
Feb 18, 2025
Vendor
Rocket Software
Product
UniData
Classifications
CWE-327, T1040
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

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

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-327Use of a Broken or Risky Cryptographic Algorithm
T1040Network Sniffing

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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