Security readout for executives and security teams
Plain-English summary
CVE-2018-25009 is a memory-safety flaw in libwebp, the library used to process WebP images. The supplied record says versions before 1.0.1 can overflow heap memory while reading image data. Business risk depends on where libwebp is embedded and whether those systems process untrusted images.
Executive priority
Treat this as an inventory and patch-verification item, not an emergency based on the supplied evidence. Raise priority for internet-facing or customer-upload image processing.
Technical view
The issue is described as a heap-based buffer overflow in libwebp GetLE16(), with CWE-125 also listed. The public bundle does not include CVSS, full impact details, or exploitability analysis. The linked Chromium source change appears to be the relevant upstream code fix reference.
Likely exposure
Exposure is most likely in products, services, browsers, image pipelines, or applications that bundle libwebp before 1.0.1 and parse WebP content from users, partners, or the internet.
Exploitation context
The supplied sources do not show CISA KEV listing or active exploitation. The Chromium OSS-Fuzz reference suggests the issue was found through fuzz testing, but the bundle does not prove public weaponization.
Researcher notes
Evidence is incomplete: no CVSS, no detailed advisory text, and metadata is slightly inconsistent because the affected entry names libwebp 1.0.1 while the description says versions before 1.0.1. Validate against upstream and vendor package data.
Mitigation direction
- Inventory software and containers that bundle libwebp.
- Prioritize systems that process untrusted WebP images.
- Update libwebp to a vendor-supported non-vulnerable version.
- Check vendor advisories for backported fixes in packaged software.
- Restrict untrusted image processing where updates are delayed.
Validation and detection
- Confirm libwebp versions in operating system packages and bundled dependencies.
- Review SBOMs and lockfiles for libwebp before 1.0.1.
- Check image upload, conversion, thumbnailing, and preview services.
- Verify vendor packages contain the upstream fix or a backport.
- Document any unresolved products needing vendor confirmation.
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-125: 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-2018-25009 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=1956917CVE reference · x_refsource_MISC
- https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=9100CVE reference · x_refsource_MISC
- https://chromium.googlesource.com/webm/libwebp/+/95fd65070662e01cc9170c4444f5c0859a710097CVE 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.
Out-of-bounds Read
Out-of-bounds Read represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.