Security Resilience

CVE-2023-27857

Memory Safety in Rockwellautomation Thinmanager 11.0.0 – 11.0.5

Memory Safety
Published
22 March 2023
Modified
21 November 2024
Patch / advisory
View advisory
CVSS Score v3.1 7.5
Click a component to see what it means
Raw vectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
EPSS Score 0.18 97th percentile
Risk Priority 72 floored blend · peak EPSS

CVSS and EPSS are reproduced from their sources (NVD, FIRST EPSS). Risk Priority is our own derived reading, not an NVD score.

Summary

CVE-2023-27857 is a high-severity Out-of-bounds Read (CWE-125) vulnerability in Rockwellautomation Thinmanager. Its CVSS base score is 7.5 (High).

Operationally, exploitation aligns with the MITRE ATT&CK technique Data Obfuscation (T1001); ranked in the top 3% of CVEs by exploit likelihood; it is not currently listed in the CISA KEV catalog.

Deeper analysis AI-assisted summary

Synthesised by an AI model from the NVD description and linked references — a reading aid, not an authoritative source.

CVE-2023-27857 is a heap-based buffer over-read vulnerability in Rockwell Automation ThinManager ThinServer. The flaw is triggered when a message field declares a length greater than the actual data present in the message, leading to an out-of-bounds read (CWE-125) that produces a read access violation and terminates the ThinServer.exe process.

An unauthenticated remote attacker can send a crafted message over the network to exploit the condition. Successful exploitation requires no user interaction or credentials and results in a denial-of-service crash of the ThinServer component, consistent with the CVSS 7.5 rating that reflects high availability impact with no confidentiality or integrity loss.

Vendor guidance is published in the Rockwell Automation knowledge-base articles referenced at the supplied URLs; these advisories describe the affected ThinManager versions and any available remediation steps. The associated EPSS score rose from lower values to a peak of 0.2795 before receding to the current 0.1737, indicating a period of increased exploitation interest after disclosure.

EU & UK References

Vulnerability Data

In affected versions, a heap-based buffer over-read condition occurs when the message field indicates more data than is present in the message field in Rockwell Automation's ThinManager ThinServer. An unauthenticated remote attacker can exploit this vulnerability to crash ThinServer.exe due…

more

to a read access violation.

CWE(s)
CWE-125

Related Threats

MITRE ATT&CK Enterprise Techniques

T1001 Data Obfuscation Command And Control
Adversaries may obfuscate command and control traffic to make it more difficult to detect.
attack.mitre.org →
T1001.002 Steganography Command And Control
Adversaries may use steganographic techniques to hide command and control traffic to make detection efforts more difficult.
attack.mitre.org →
T1003.002 Security Account Manager Credential Access
Adversaries may attempt to extract credential material from the Security Account Manager (SAM) database either through in-memory techniques or through the Windows Registry where the SAM database is stored.
attack.mitre.org →
T1003.003 NTDS Credential Access
Adversaries may attempt to access or create a copy of the Active Directory domain database in order to steal credential information, as well as obtain other information about domain members such as devices, users, and access rights.
attack.mitre.org →
T1003.004 LSA Secrets Credential Access
Adversaries with SYSTEM access to a host may attempt to access Local Security Authority (LSA) secrets, which can contain a variety of different credential materials, such as credentials for service accounts.
attack.mitre.org →
T1003.006 DCSync Credential Access
Adversaries may attempt to access credentials and other sensitive information by abusing a Windows Domain Controller's application programming interface (API)(Citation: Microsoft DRSR Dec 2017) (Citation: Microsoft GetNCCChanges) (Citati…
attack.mitre.org →
Derived from this CVE’s CWE(s) via the direct CWE→ATT&CK cross-walk.

CVEs Like This One

CVE-2024-10387Same product: Rockwellautomation Thinmanager
CVE-2024-21920Same vendor: Rockwellautomation
CVE-2023-29460Same vendor: Rockwellautomation
CVE-2024-12130Same vendor: Rockwellautomation
CVE-2025-3285Same vendor: Rockwellautomation
CVE-2025-3288Same vendor: Rockwellautomation
CVE-2023-29461Same vendor: Rockwellautomation
CVE-2025-3286Same vendor: Rockwellautomation
CVE-2025-3287Same vendor: Rockwellautomation
CVE-2023-27854Same vendor: Rockwellautomation

Affected Assets

rockwellautomation
thinmanager
13.0.0 · 11.0.0 — 11.0.5 · 11.1.0 — 11.1.5 · 11.2.0 — 11.2.6

Mitigating Controls

Mitigating Controls (NIST CSF 2.0) AI

Derived directly from the weakness types (CWEs) cited in the NVD entry via our AI-authored CWE→CSF cross-walk (authority under review) — links open the control.

ID.RA-01 partial match
blocks

Vulnerability scanning and recording can discover instances of out-of-bounds reads after code is deployed.

PR.PS-02 partial match
blocks

Routine patching replaces vulnerable code containing out-of-bounds read flaws.

PR.PS-06 partial match
blocks

Secure-development practices such as bounds checking and memory-safe languages directly prevent out-of-bounds reads.

Mitigating Controls (ISO/IEC 27001:2022 Annex A) AI

Derived directly from the weakness types (CWEs) cited in the NVD entry via our AI-authored CWE→ISO cross-walk (authority under review) — links open the control.

A.5.14 Information transfer partial match
removes
A.5.15 Access control partial match
removes
A.5.16 Identity management partial match
removes
A.5.17 Authentication information partial match
removes
A.5.18 Access rights partial match
removes
A.8.10 Information deletion partial match
removes

References