Security readout for executives and security teams
Plain-English summary
This is a Java TLS handling flaw in Oracle Java SE and GraalVM Enterprise Edition. An unauthenticated network attacker could cause a partial denial of service in affected Java-based services. The business risk is service degradation, not data theft or code execution based on the supplied sources.
Executive priority
Treat as a moderate availability risk. Patch during the normal security cycle, accelerating for internet-facing Java services or business-critical systems where partial denial of service would affect customers or operations.
Technical view
The vulnerability affects JSSE in Java SE 7u311, 8u301, 11.0.12 and GraalVM Enterprise Edition 20.3.3 and 21.2.0. CVSS is 5.3: network reachable, low complexity, no privileges or user interaction, availability impact only. Oracle notes exploitation is through data supplied to JSSE APIs, such as via a web service.
Likely exposure
Exposure is most likely where affected Java or GraalVM runtimes handle TLS traffic for network-accessible applications. Internet-facing Java web services, APIs, or middleware using JSSE deserve priority review. Systems not using the affected runtime versions or not accepting relevant TLS traffic are less likely exposed.
Exploitation context
The source bundle does not show CISA KEV listing or active exploitation evidence. The flaw is described as easily exploitable over the network via TLS, but the documented impact is limited to partial denial of service, with no confidentiality or integrity impact stated.
Researcher notes
No CWE or detailed root cause is provided in the bundle. Keep analysis scoped to JSSE availability impact and the listed affected versions. Avoid claiming exploit maturity beyond network reachability and low attack complexity in the CVSS vector.
Mitigation direction
- Apply Oracle CPU or distro security updates for affected Java and GraalVM runtimes.
- Prioritize externally reachable Java services that terminate or process TLS with JSSE.
- Check NetApp and OS vendor advisories for bundled or dependent Java runtime updates.
- If immediate patching is delayed, monitor vendor guidance for supported compensating controls.
Validation and detection
- Inventory Java SE, OpenJDK, and GraalVM runtime versions across servers and containers.
- Identify applications using JSSE for TLS-enabled web services or APIs.
- Confirm affected versions were replaced by vendor-supported fixed packages.
- Review availability monitoring for unusual TLS-related service degradation.
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.
CVE-2021-35565 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
- Medium
- CVSS
- 5.3 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
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 vector scores
1 official scoreWe collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L3.91.4Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
5.3MediumVector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
Source materials
- CVE List V5 sourceCVE List V5
- https://www.oracle.com/security-alerts/cpuoct2021.htmlCVE reference
- https://security.netapp.com/advisory/ntap-20211022-0004/CVE reference
- FEDORA-2021-35145352b0CVE reference · vendor-advisory
- FEDORA-2021-7701833090CVE reference · vendor-advisory
- FEDORA-2021-9a51a6f8b1CVE reference · vendor-advisory
- FEDORA-2021-1cc8ffd122CVE reference · vendor-advisory
- FEDORA-2021-eb3e3e87d3CVE reference · vendor-advisory
- FEDORA-2021-107c8c5063CVE reference · vendor-advisory
- DSA-5000CVE reference · vendor-advisory
- [debian-lts-announce] 20211109 [SECURITY] [DLA 2814-1] openjdk-8 security updateCVE reference · mailing-list
- GLSA-202209-05CVE reference · vendor-advisory
- https://security.netapp.com/advisory/ntap-20240621-0006/CVE reference
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.