Security readout for executives and security teams
Plain-English summary
CVE-2021-27845 is a divide-by-zero flaw reported in JasPer Image Coding Toolkit 2.0. In practical terms, a vulnerable image-processing path may crash when it hits the vulnerable condition. The public record does not provide CVSS scoring, named downstream products, or confirmed exploitation.
Executive priority
Track as an exposure-management item until vendor remediation is confirmed. Business urgency depends on whether JasPer 2.0 processes untrusted image content in production; the public record does not justify claiming active attack activity.
Technical view
The CVE describes a divide-by-zero vulnerability in jasper/src/libjasper/jpc/jpc_enc.c, which indicates the JPEG-2000 encoding path in JasPer 2.0. Source metadata is sparse: no CWE, CPE, CVSS vector, affected product table, patch version, or exploit details are provided in the bundle.
Likely exposure
Organizations may be exposed if they ship or depend on JasPer Image Coding Toolkit 2.0, especially for JPEG-2000 encoding. The sources do not identify affected downstream products, distributions, packages, or exact fixed versions.
Exploitation context
The bundle does not show CISA KEV listing or any cited evidence of active exploitation. The only named technical reference is a public GitHub issue. Treat exploitability and trigger conditions as unconfirmed from the provided evidence.
Researcher notes
The CVE record is thin. It names a file and weakness class implied by divide-by-zero, but lacks scoring, CPEs, affected version range beyond 2.0, patch status, and reproducibility details in the provided bundle. Validate against upstream issue context before assigning operational severity.
Mitigation direction
- Inventory applications and packages that include JasPer Image Coding Toolkit 2.0.
- Check upstream JasPer guidance and issue 194 for fixed-version or patch information.
- Reduce processing of untrusted JPEG-2000 content where JasPer encoding is reachable.
- Prioritize replacement or update once a vendor-supported fixed build is identified.
Validation and detection
- Confirm whether JasPer 2.0 is present in application and container dependency inventories.
- Verify whether JPEG-2000 encoding paths call the vulnerable JasPer component.
- Review vendor advisories or package changelogs for CVE-2021-27845 references.
- Check crash telemetry for unexplained divide-by-zero failures in JasPer paths.
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-2021-27845 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://github.com/jasper-software/jasper/issues/194CVE 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.