Security readout for executives and security teams
Plain-English summary
LibSass 3.4.5 has a memory-read bug in its lexer. A malicious stylesheet-like input can crash software that parses it, causing denial of service. The provided sources do not include a CVSS score, confirmed patch version, or evidence of active exploitation.
Executive priority
Treat as a service-availability risk, not confirmed data theft or code execution. Prioritize systems that parse untrusted stylesheet input, especially internet-facing services, while tracking vendor guidance for a confirmed fix path.
Technical view
CVE-2017-11341 is a heap-based buffer over-read in lexer.hpp of LibSass 3.4.5. The CVE description states crafted input can lead to remote denial of service. Available source data does not identify broader affected versions, CWE mapping, or fixed release details.
Likely exposure
Exposure is most plausible where LibSass 3.4.5 parses attacker-controlled Sass or stylesheet input, such as upload, preview, conversion, or build services. Internal build pipelines are lower risk unless they process untrusted dependencies or user submissions.
Exploitation context
The bundle states crafted input can trigger remote denial of service. CISA KEV is false, and the provided sources do not document active exploitation, public exploit activity, or weaponized campaigns.
Researcher notes
Evidence is sparse: the CVE record names LibSass 3.4.5 and lexer.hpp, but provides no CVSS, CWE, patch version, or affected-version range. Avoid assuming exploitability beyond denial of service from crafted input.
Mitigation direction
- Inventory applications, packages, and containers using LibSass 3.4.5.
- Check upstream, OS vendor, and distribution guidance for fixed versions.
- Avoid processing untrusted stylesheet input with affected LibSass deployments.
- Isolate parsing workers and enforce resource limits around stylesheet processing.
- Prioritize remediation for public or multi-tenant parsing services.
Validation and detection
- Confirm exact LibSass versions in application dependencies and OS packages.
- Trace whether user-supplied or third-party stylesheet content reaches LibSass.
- Review service crash logs for recurring LibSass parser failures.
- Identify public endpoints offering stylesheet upload, preview, conversion, or build features.
- Document vendor advisory status and any applied package updates.
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-2017-11341 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://bugzilla.redhat.com/show_bug.cgi?id=1470714CVE 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.