Security readout for executives and security teams
Plain-English summary
CVE-2021-30357 is an information disclosure issue in SSL Network Extender Client for Linux before build 800008302. A user could cause part of a supplied configuration file to be revealed, including content from files they should not be able to read. The sources do not provide CVSS severity.
Executive priority
Prioritize as a targeted client hygiene issue rather than an internet-wide emergency. Patch vulnerable Linux VPN clients during the next security maintenance cycle, faster for shared systems or privileged administrative workstations.
Technical view
The vulnerability is categorized as CWE-209 and affects SSL Network Extender Client for Linux versions before build 800008302. The reported behavior is partial disclosure of supplied configuration file contents, including unauthorized file content. The source bundle does not describe exploit prerequisites, affected distributions, or detailed remediation steps beyond the build boundary.
Likely exposure
Exposure appears limited to Linux systems running SSL Network Extender Client builds earlier than 800008302. Organizations should focus on managed endpoints, VPN client deployment inventories, and any systems where untrusted or low-privileged users can interact with the client configuration path.
Exploitation context
The bundle does not cite public exploitation, and KEV status is false. No exploit maturity, attack complexity, or remote exploitability evidence is provided. Treat this as a potential local or user-context information disclosure until vendor guidance confirms prerequisites.
Researcher notes
Available evidence is sparse: no CVSS vector, exploit details, or prerequisite statement is included in the bundle. The key confirmed facts are the affected product, pre-800008302 version boundary, CWE-209 classification, and partial unauthorized file disclosure impact.
Mitigation direction
- Upgrade SSL Network Extender Client for Linux to build 800008302 or later.
- Review Check Point advisory sk173513 for vendor-specific remediation guidance.
- Restrict use of vulnerable client builds on shared or multi-user Linux systems.
- Remove obsolete installer packages and unmanaged vulnerable client copies.
Validation and detection
- Inventory Linux endpoints for SSL Network Extender Client installations and build numbers.
- Confirm no deployed client build is earlier than 800008302.
- Review endpoint management records for unmanaged or manually installed VPN clients.
- Check vendor advisory sk173513 for any additional affected-version details.
Public sources used
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.
ATT&CK lookup starting points
Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.
CWE-209: Information exposure and cloud metadata lookup
Information exposure and SSRF weaknesses can make discovery, cloud metadata, and credential material review relevant. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.
Open ATT&CK lookupCVE-2021-30357 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- Unknown
- CVSS
- Not scored
- Known Exploited
- No
- Published
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
CVSS and timeline data
No CVSS vectors or timeline events were available in the normalized CVE source material.
Source materials
- CVE List V5 sourceCVE List V5
- https://supportcontent.checkpoint.com/solutions?id=sk173513CVE reference · x_refsource_MISC
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.
Generation of Error Message Containing Sensitive Information
Generation of Error Message Containing Sensitive Information represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.