CyberSecBulletin
CVE-2023-1150NVD status: Modified

750-332: Missing Release of Resource after Effective Lifetime

Published Updated By the CyberSecBulletin desk

CVE-2023-1150 is a high-severity missing release of resource after effective lifetime vulnerability in 750-332 from WAGO, with a CVSS 3.1 base score of 7.5 out of 10. It can be exploited remotely over the network by an unauthenticated attacker, without any action from a user. Affected 750-332 versions: FW10 and earlier. The record does not name a fixed version, so check the vendor advisory. There is no confirmed exploitation so far. EPSS estimates a 0.93% chance of exploitation within 30 days, higher than 61% of scored CVEs.

Next patch cycle

High severity with no evidence of exploitation so far.

What to do

  1. Update 750-363/040-000 Firmware to fw11 or a later version.
  2. Update 750-362/040-000 Firmware to fw11 or a later version.
  3. Update 750-362/000-001 Firmware to fw11 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
WAGO750-332FW10 and earlierNot stated
WAGO750-362/xxx-xxxFW10 and earlierNot stated
WAGO750-363/xxx-xxxFW10 and earlierNot stated
WAGO750-364/xxx-xxxFW10 and earlierNot stated
WAGO750-365/xxx-xxxFW10 and earlierNot stated
WAGO750-823FW10 and earlierNot stated
WAGO750-832/xxx-xxxFW10 and earlierNot stated
WAGO750-862FW10 and earlierNot stated
WAGO750-890/xxx-xxxFW10 and earlierNot stated
WAGO750-891FW10 and earlierNot stated
WAGO750-893FW10 and earlierNot stated
Wago750-363/040-000 Firmwarebefore fw11fw11
Wago750-362/040-000 Firmwarebefore fw11fw11
Wago750-362/000-001 Firmwarebefore fw11fw11
Wago750-891 Firmwarebefore fw11fw11
Wago750-365/040-010 Firmwarebefore fw11fw11
Wago750-364/040-010 Firmwarebefore fw11fw11
Wago750-362 Firmwarebefore fw11fw11
Wago750-363 Firmwarebefore fw11fw11
Wago750-823 Firmwarebefore fw11fw11
Wago750-832 Firmwarebefore fw11fw11
Wago750-832/000-002 Firmwarebefore fw11fw11
Wago750-862 Firmwarebefore fw11fw11
Wago750-890 Firmwarebefore fw11fw11
Wago750-890/025-000 Firmwarebefore fw11fw11

Version data comes from the organisation that assigned the CVE; 4 further products are omitted here. 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
NoneNo data is disclosed.
Integrity
NoneNothing can be modified.
Availability
HighThe component can be taken down completely.

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

Official description

Uncontrolled resource consumption in Series WAGO 750-3x/-8x products may allow an unauthenticated remote attacker to DoS the MODBUS server with specially crafted packets.

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

The underlying weakness: Missing Release of Resource after Effective Lifetime

The product does not release a resource after its effective lifetime has ended, i.e., after the resource is no longer needed.

How developers prevent this class of flaw

  • Use a language that does not allow this weakness to occur or provides constructs that make this weakness easier to avoid. For example, languages such as Java, Ruby, and Lisp perform automatic garbage collection that releases memory for objects that have been deallocated.
  • It is good practice to be responsible for freeing all resources you allocate and to be consistent with how and where you free resources in a function. If you allocate resources that you intend to free upon completion of the function, you must be sure to free the resources at all exit points for that function including error conditions.

More Missing Release of Resource after Effective Lifetime vulnerabilities (CWE-772)

Timeline

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

References

Third-party and government advisories

Recent Missing Release of Resource after Effective Lifetime vulnerabilities

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