Stack buffer overflow in UniRPC service

published 2023-03-29 3 y ago modified 2026-06-17 4 mo ago also EUVD-2023-32176

cvss: 8.8; version 3.1, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 0.9%; EPSS 0.9% chance of exploitation in 30 days, percentile 60%
public exploits: 0; none known

Rocket Software UniData versions prior to 8.2.4 build 3003 and UniVerse versions prior to 11.3.5 build 1001 or 12.2.1 build 2002 suffer from a stack-based buffer overflow, where a string is copied into a buffer using a memcpy-like function and a user-provided length. This requires a valid login to exploit.

Patch / fix

fixed in 2

Rocket Software UniData 8.2.43.3003
Rocket Software UniVerse 11.3.5.1001, 12.2.1.2002

CISA SSVC

Exploitation: Proof of concept is public
Automatable: no
Technical impact: total
Assessed: 20 mo ago (2025-02-18)

Exploit prediction

0.91% chance of exploitation in the next 30 days, higher than 60% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by	version	score	vector
CISA ADP	3.1	8.8	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
NVD	3.1	8.8	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CNA	3.1	8.8	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Affected products

Rocket Software UniData
Rocket Software UniVerse

Classification

Weakness

CWE-120 Buffer Copy without Checking Size of Input
CWE-787 Out-of-bounds Write

References

rapid7.com /blog/post/2023/03/29/multiple-vulnerabilities-in-rocket-software-unirpc-server-fixed/
third-party-advisory

Sources

CVE List CVE-2023-28506
NVD CVE-2023-28506

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

Summary