Security readout for executives and security teams
Plain-English summary
CVE-2020-3343 is a denial-of-service issue in Cisco AMP for Endpoints connectors for Linux and macOS. A logged-in local attacker could make the endpoint protection service crash and restart. The cited sources describe availability impact, not data theft or system takeover.
Executive priority
Treat this as a moderate availability risk. It can disrupt endpoint protection on affected Linux and macOS systems, but the cited evidence requires local authenticated access and does not indicate active exploitation or confidentiality impact.
Technical view
The vulnerability is a memory buffer issue caused by insufficient input validation in Cisco AMP for Endpoints Linux Connector and Mac Connector software. The CVSS vector is local, low complexity, low privileges, no user interaction, unchanged scope, and high availability impact only.
Likely exposure
Exposure is limited to systems running affected Cisco AMP for Endpoints Linux or Mac Connector software. The source bundle does not provide specific affected or fixed version numbers, so inventory must be checked against Cisco’s advisory.
Exploitation context
The attacker must already have local authenticated access. The source bundle says exploitation involves a crafted packet and can crash and restart the Cisco AMP for Endpoints service. KEV is false, and no cited source supports active exploitation.
Researcher notes
This is mapped to CWE-119 and presents as a local authenticated availability issue. Public bundle details are thin on affected versions and remediation specifics. Avoid assuming broader Cisco AMP products, remote exploitation, or code execution from the provided evidence.
Mitigation direction
- Review Cisco’s advisory for affected and fixed connector versions.
- Update Linux and Mac connectors according to Cisco guidance.
- Limit local user access on systems running affected connectors.
- Monitor for repeated AMP service crashes or restarts.
- Prioritize systems where endpoint protection downtime creates operational risk.
Validation and detection
- Inventory Cisco AMP for Endpoints Linux and Mac Connector deployments.
- Compare installed connector versions with Cisco’s advisory.
- Check endpoint logs for AMP service crash or restart events.
- Confirm connector services remain stable after remediation.
- Verify local user access is limited to approved accounts.
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-119: Exact CWE lookup
Use the exact CWE identifier as the starting point before reviewing related ATT&CK behavior. 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-2020-3343 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
- 5.5 (3.0)
- Known Exploited
- No
- Published
Vector: CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
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:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H1.83.6Primary CVE scoreVulnerability scoring details
Base CVSS 3.0 score
5.5MediumVector: CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Source materials
- CVE List V5 sourceCVE List V5
- 20200520 Cisco AMP for Endpoints Linux Connector and AMP for Endpoints Mac Connector Software Memory Buffer VulnerabilityCVE reference · vendor-advisory, x_refsource_CISCO
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.
Improper Restriction of Operations within the Bounds of a Memory Buffer
Improper Restriction of Operations within the Bounds of a Memory Buffer represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.