Check Point Endpoint Security Client for Windows: Improper Link Resolution Before File Access
CVE-2022-23742 is a high-severity improper link resolution before file access vulnerability in Check Point Endpoint Security Client for Windows, with a CVSS 3.1 base score of 7.8 out of 10. It can be exploited with local access to the system by an attacker with a low-privileged account, without any action from a user. Affected Check Point Endpoint Security Client for Windows versions: before E86.40. The record does not name a fixed version, so check the vendor advisory. There is no confirmed exploitation so far. EPSS estimates a 4.17% chance of exploitation within 30 days, which is in the top 8.94% of all scored CVEs.
High severity with no evidence of exploitation so far.
What to do
- Update Endpoint Security to e86.40 or a later version.
- Read the advisory on supportcontent.checkpoint.com for workarounds and exact fixed builds.
Affected products and versions
| Vendor | Product | Affected versions | Fixed in |
|---|---|---|---|
| Check Point Endpoint Security Client for Windows | Check Point Endpoint Security Client for Windows | before E86.40 | Not stated |
| Check Point | Endpoint Security | before e86.40 | e86.40 |
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
- LocalThe attacker needs local access or must trick a user into running something.
- Attack complexity
- LowNo special conditions are needed; the attack works reliably.
- Privileges required
- LowA basic user account is enough.
- 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:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H. Scored by NVD.
| Scoring system | Score | Severity | Scored by |
|---|---|---|---|
| CVSS 3.1 | 7.8 | High | NVD |
| CVSS 3.1 | 7.8 | High | CISA (ADP) |
| CVSS 2.0 | 4.6 | Medium | NVD |
Official description
Check Point Endpoint Security Client for Windows versions earlier than E86.40 copy files for forensics reports from a directory with low privileges. An attacker can replace those files with malicious or linked content, such as exploiting CVE-2020-0896 on unpatched systems or using symbolic links.
Source: the CVE record as published by its numbering authority, via NVD and CVE.org.
The underlying weakness: Improper Link Resolution Before File Access
The product attempts to access a file based on the filename, but it does not properly prevent that filename from identifying a link or shortcut that resolves to an unintended resource.
How developers prevent this class of flaw
- Follow the principle of least privilege when assigning access rights to entities in a software system. Denying access to a file can prevent an attacker from replacing that file with a link to a sensitive file. Ensure good compartmentalization in the system to provide protected areas that can be trusted.
More Improper Link Resolution Before File Access vulnerabilities (CWE-59)
Timeline
- CVE record published.
- CISA published its SSVC assessment (exploitation: none, automatable: no, technical impact: total).
- Record last changed materially (score, affected products, status or references).
References
Other references
Recent Improper Link Resolution Before File Access vulnerabilities
- 7.2 High severity
- 7.8 High severity
- 7.8 High severity
- 7.3 High severity
- 9.8 Critical severity
- 8.8 High severity
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