CyberSecBulletin
CVE-2024-49775NVD status: Deferred

Opcenter Execution Foundation: Heap-based Buffer Overflow

Published Updated By the CyberSecBulletin desk

CVE-2024-49775 is a critical-severity heap-based buffer overflow vulnerability in Opcenter Execution Foundation from Siemens, with a CVSS 3.1 base score of 9.8 out of 10. It can be exploited remotely over the network by an unauthenticated attacker, without any action from a user. The record lists version V2501.0001 as the first without the flaw, so updating Opcenter Execution Foundation to that release or later removes the exposure. There is no confirmed exploitation so far. EPSS estimates a 1.51% chance of exploitation within 30 days, higher than 75% of scored CVEs.

Patch this week

Critical severity: a successful attack would have severe impact.

What to do

  1. Update Opcenter Execution Foundation to V2501.0001 or a later version.
  2. Update Opcenter Intelligence to V2501.0001 or a later version.
  3. Update Opcenter Quality to V2512 or a later version.
  4. Until you can update, restrict network access to the affected service so it is not reachable from untrusted networks.

Affected products and versions

VendorProductAffected versionsFixed in
SiemensOpcenter Execution Foundationbefore V2501.0001V2501.0001
SiemensOpcenter Intelligencebefore V2501.0001V2501.0001
SiemensOpcenter Qualitybefore V2512V2512
SiemensOpcenter RDnLbefore V2410V2410
SiemensSIMATIC PCS neo V4.0all versionsNot stated
SiemensSIMATIC PCS neo V4.1before V4.1 Update 3V4.1 Update 3
SiemensSIMATIC PCS neo V5.0before V5.0 Update 1V5.0 Update 1
SiemensSINEC NMSall versionsNot stated
SiemensTotally Integrated Automation Portal (TIA Portal) V16all versionsNot stated
SiemensTotally Integrated Automation Portal (TIA Portal) V17all versionsNot stated
SiemensTotally Integrated Automation Portal (TIA Portal) V18all versionsNot stated
SiemensTotally Integrated Automation Portal (TIA Portal) V19all versionsNot stated

Version data comes from the organisation that assigned the CVE. Confirm against the vendor advisory before deciding you are unaffected.

How the severity score breaks down

Attack vector
NetworkCan be exploited remotely over a network, including the internet.
Attack complexity
LowNo special conditions are needed; the attack works reliably.
Privileges required
NoneNo account or login is needed.
User interaction
NoneNo action by a victim is required.
Scope
UnchangedImpact stays within the vulnerable component.
Confidentiality
HighAll data handled by the component can be read.
Integrity
HighData or code can be modified at will.
Availability
HighThe component can be taken down completely.

Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H. Scored by CNA (siemens.com).

Scoring systemScoreSeverityScored by
CVSS 4.09.3CriticalCNA (siemens.com)
CVSS 3.19.8CriticalCNA (siemens.com)

Official description

A vulnerability has been identified in Opcenter Execution Foundation (All versions < V2501.0001), Opcenter Intelligence (All versions < V2501.0001), Opcenter Quality (All versions < V2512), Opcenter RDnL (All versions < V2410), SIMATIC PCS neo V4.0 (All versions), SIMATIC PCS neo V4.1 (All versions < V4.1 Update 3), SIMATIC PCS neo V5.0 (All versions < V5.0 Update 1), SINEC NMS (All versions if operated in conjunction with UMC < V2.15), Totally Integrated Automation Portal (TIA Portal) V16 (All versions), Totally Integrated Automation Portal (TIA Portal) V17 (All versions), Totally Integrated Automation Portal (TIA Portal) V18 (All versions), Totally Integrated Automation Portal (TIA Portal) V19 (All versions). Affected products contain a heap-based buffer overflow vulnerability in the integrated UMC component. This could allow an unauthenticated remote attacker to execute arbitrary code.

Source: the CVE record as published by its numbering authority, via NVD and CVE.org.

The underlying weakness: Heap-based Buffer Overflow

The product writes past the end of a buffer that was allocated on the heap.

How developers prevent this class of flaw

  • Pre-design: Use a language or compiler that performs automatic bounds checking.
  • Use an abstraction library to abstract away risky APIs. Not a complete solution.
  • Use automatic buffer overflow detection mechanisms that are offered by certain compilers or compiler extensions. Examples include: the Microsoft Visual Studio /GS flag, Fedora/Red Hat FORTIFY_SOURCE GCC flag, StackGuard, and ProPolice, which provide various mechanisms including canary-based detection and range/index checking. D3-SFCV (Stack Frame Canary Validation) from D3FEND discusses canary-based detection in detail.

More Heap-based Buffer Overflow vulnerabilities (CWE-122)

Timeline

  1. CVE record published.
  2. CISA published its SSVC assessment (exploitation: none, automatable: yes, technical impact: total).
  3. Record last changed materially (score, affected products, status or references).

References

Other vulnerabilities in Opcenter Execution Foundation

All Opcenter Execution Foundation vulnerabilities

Recent Heap-based Buffer Overflow vulnerabilities

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