Security readout for executives and security teams
Plain-English summary
Suricata 4.0.4 has a flaw in how it parses SSH banners. A malformed banner can make the parser read beyond allocated data. The available sources do not state active exploitation, CVSS severity, or a complete business-impact description.
Executive priority
Treat this as a targeted remediation item if Suricata 4.0.4 is present. Without evidence of exploitation or published severity, it is not source-supported as an emergency, but sensor reliability can affect monitoring coverage.
Technical view
CVE-2018-10242 is an SSH app-layer parsing issue in Suricata 4.0.4. SSHParseBanner in app-layer-ssh.c lacks a length check, allowing malformed SSH banner input to cause an out-of-bounds read during parsing.
Likely exposure
Exposure appears limited to environments running Suricata 4.0.4, especially where the sensor inspects SSH traffic. The CVE bundle does not provide CPEs or broader affected-version ranges.
Exploitation context
The source bundle describes malformed SSH banner handling but provides no exploit status. KEV is false, and no cited source states active exploitation in the wild.
Researcher notes
The main evidence is the CVE description and linked Suricata/Debian advisories. Affected-product metadata is incomplete in the bundle, so version scoping beyond Suricata 4.0.4 should be validated against vendor or distro records.
Mitigation direction
- Inventory Suricata deployments and identify any version 4.0.4 instances.
- Review Suricata 4.0.5 release guidance for the relevant security fix.
- Apply vendor or distribution security updates where Suricata is packaged.
- For Debian-managed systems, review DLA 1751-1 and update affected packages.
Validation and detection
- Confirm deployed Suricata versions through asset or package inventory.
- Verify sensors inspecting SSH traffic are not running vulnerable 4.0.4 builds.
- Check package changelogs or advisory metadata for CVE-2018-10242 coverage.
- After updating, confirm Suricata service health and expected traffic inspection continues.
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-2018-10242 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://suricata-ids.org/2018/07/18/suricata-4-0-5-available/CVE reference · x_refsource_CONFIRM
- [debian-lts-announce] 20190408 [SECURITY] [DLA 1751-1] suricata security updateCVE reference · mailing-list, x_refsource_MLIST
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.