When asking to get a file from a file:// URL, libcurl provides a feature that outputs…
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- Required
- Attack complexity
- Low
- Impact type
- Information disclosure
- Confidentiality · integrity · availability
- High · None · None
- Fix status
- No fix listed
Attack profile from CVSS 3.0 · NVD. Fix status from CNA. Impact type from CWE-200.
Summary
When asking to get a file from a file:// URL, libcurl provides a feature that outputs meta-data about the file using HTTP-like headers. The code doing this would send the wrong buffer to the user (stdout or the application's provide callback), which could lead to other private data from the heap to get inadvertently displayed. The wrong buffer was an uninitialized memory area allocated on the heap and if it turned out to not contain any zero byte, it would continue and display the data following that buffer in memory.
Why it matters now
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| — | — | all versions | — | No fix listed | CNA |
- — Vendor— Affected all versions Fixed in — No fix listed CNA
Remediation
No fixed version listed by the sources yet.
Vendor assessments
Red Hat
Red Hat rating: Moderate. Red Hat's page for this CVE →
Not affected: 10 products
- .NET Core 1.0 on Red Hat Enterprise Linux
- .NET Core 1.1 on Red Hat Enterprise Linux
- .NET Core 2.0 on Red Hat Enterprise Linux
- Red Hat Ceph Storage 2
- Red Hat Enterprise Linux 5
- Red Hat Enterprise Linux 6
- Red Hat Enterprise Linux 7
- Red Hat Enterprise Virtualization 3
- Red Hat JBoss Enterprise Web Server 3
- Red Hat Software Collections
Timeline
- 2026-10-02 Threatist record created from CVE-2017-1000099
- 2026-10-03 Alias added: GHSA-q937-ph5c-26qf
References
More Haxx Libcurl vulnerabilities
- TI-2023-19922 Out-of-bounds write in curl CVSS 3.1CRITICAL 9.8
- TI-2020-06702 Uncontrolled recursion in https://github.com/curl/curl CVSS 3.1HIGH 7.5
- TI-2025-00616 gzip integer overflow CVSS 3.1HIGH 7.3
- TI-2019-03845 Heap-based buffer overflow in curl CVSS 3.1HIGH 7.8
- TI-2021-05737 Information disclosure in https://github.com/curl/curl CVSS 3.1MEDIUM 5.3
- TI-2017-06326 Out-of-bounds read in curl and libcurl before 7.57.0 CVSS 3.1CRITICAL 9.8
Sources
- CVE-2017-1000099 · CVE Program
- CVE-2017-1000099 · NVD
- FIRST EPSS
- GHSA-q937-ph5c-26qf · GitHub Advisory Database · CC BY 4.0
- CVE-2017-1000099 · Red Hat security data · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences