Security readout for executives and security teams
Plain-English summary
CVE-2018-11556 concerns a possible memory corruption issue in Little CMS 2.9's tificc sample utility when handling a crafted TIFF file. The supplied record says the issue is tied to sample code using LIBTIFF, not the core lcms2 library. Severity, affected products, and fixed versions are not established in the provided sources.
Executive priority
Do not treat this as an emergency without evidence that tificc processes untrusted TIFF files in production. Prioritize exposure confirmation and vendor guidance because severity and affected-product data are incomplete.
Technical view
The CVE describes an out-of-bounds write in cmsPipelineCheckAndRetreiveStages in cmslut.c, reachable through tificc with a crafted TIFF. The record includes a developer-position note that lcms2 itself does not depend on LIBTIFF except for sample programs and that the issue was not reproducible in the lcms2 library.
Likely exposure
Exposure appears limited to environments that build, ship, or run the tificc sample utility from Little CMS 2.9 against untrusted TIFF files. The supplied affected-product data is marked n/a, so broader exposure cannot be confirmed.
Exploitation context
The CVE references a public PoC repository, but the source bundle does not show CISA KEV listing or confirmed active exploitation. Treat exploit status as unconfirmed, with public proof material possibly available.
Researcher notes
Key uncertainty is scope. The CVE title names tificc, while the note limits impact to sample code using LIBTIFF and says the issue does not apply to the lcms2 library. Validate downstream packaging before assigning business risk.
Mitigation direction
- Identify whether tificc from Little CMS 2.9 is installed or used.
- Avoid processing untrusted TIFF files with tificc sample tooling.
- Check Little CMS project guidance before assuming the core library is affected.
- Isolate image-conversion workflows that must process untrusted files.
- Prefer maintained distribution packages if tificc is required.
Validation and detection
- Inventory systems for Little CMS 2.9 and the tificc binary.
- Confirm whether any workflow accepts TIFF files from untrusted sources.
- Review package builds for sample programs linked with LIBTIFF.
- Check vendor or distribution advisories for downstream treatment.
- Document whether exposure is sample-tool-only or application-facing.
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-2018-11556 mapping review
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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://github.com/mm2/Little-CMS/issues/167CVE reference · x_refsource_MISC
- https://github.com/xiaoqx/pocs/tree/master/cmsCVE 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.