Security readout for executives and security teams
Plain-English summary
CVE-2017-2895 affects Cesanta Mongoose 6.8, a small web and IoT networking library. A malicious network packet sent to MQTT functionality can make the software read memory outside expected bounds, risking service crashes and limited information disclosure.
Executive priority
Treat this as high priority for internet-facing or operationally critical MQTT services. Business impact is mainly outage risk, with some information disclosure risk. Priority is lower where Mongoose 6.8 is absent or MQTT is not reachable.
Technical view
The flaw is an out-of-bounds arbitrary memory read in Mongoose 6.8 MQTT SUBSCRIBE packet parsing. The CVSS 3.0 vector is network-accessible, low complexity, unauthenticated, no user interaction, with low confidentiality impact and high availability impact.
Likely exposure
Exposure is most likely in embedded, IoT, or application components that include Cesanta Mongoose 6.8 and enable MQTT parsing on a reachable network service.
Exploitation context
The source bundle says an attacker can trigger the issue by sending a crafted MQTT packet over the network. KEV is false, and no supplied source states active exploitation.
Researcher notes
Evidence supports a network-triggerable MQTT SUBSCRIBE parsing memory-read issue in Mongoose 6.8. The provided sources do not name a patch level or confirmed exploitation, so remediation should be tied to vendor guidance and asset verification.
Mitigation direction
- Inventory products and firmware that embed Cesanta Mongoose 6.8.
- Check Cesanta and product-vendor guidance for fixed or supported versions.
- Restrict MQTT services to trusted networks and authenticated clients where possible.
- Disable MQTT functionality where it is not required.
- Monitor affected services for crashes or unusual MQTT traffic.
Validation and detection
- Confirm whether deployed software or firmware includes Mongoose 6.8.
- Identify hosts exposing MQTT functionality that depends on Mongoose.
- Review SBOMs, vendor advisories, and build manifests for Mongoose references.
- Check logs for unexplained service restarts or MQTT parsing errors.
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
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CVE-2017-2895 mapping review
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Open ATT&CK lookup- Severity
- High
- CVSS
- 8.2 (3.0)
- Known Exploited
- No
- Published
Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/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:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H3.94.2Primary CVE scoreVulnerability scoring details
Base CVSS 3.0 score
8.2HighVector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H
Source materials
- CVE List V5 sourceCVE List V5
- https://www.talosintelligence.com/vulnerability_reports/TALOS-2017-0402CVE 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.