Memory corruption via unbounded sprintf writes
Published Jun 26, 2025 · Updated Jun 27, 2025
Buffer overflows in YubiServer before 0.6 allow remote attackers to corrupt process memory through crafted validation requests. Fixed-size query and log buffers in the server and administration code receive request or database strings through unbounded sprintf calls. No authentication or user interaction is required; published sources do not establish whether exploitation stops at a server crash or enables code execution.
Summary
What happened
Buffer overflows in YubiServer before 0.6 allow remote attackers to corrupt process memory through crafted validation requests. Fixed-size query and log buffers in the server and administration code receive request or database strings through unbounded sprintf calls. No authentication or user interaction is required; published sources do not establish whether exploitation stops at a server crash or enables code execution.
The record
- CVE
- CVE-2015-0843
- Published
- Jun 26, 2025
- Updated
- Jun 27, 2025
- Vendor
- Chrysostomos Nanakos
- Product
- YubiServer
- Classifications
- CWE-120, T1190
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Jun 26, 2025CVE publishedPublication date reported by the CVE source.
- Jun 27, 2025Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=0 <0.6
What conditions does exploitation require?
What is affected?
Published CVSS scores
CVSS describes severity. EPSS estimates exploitation probability.
Attacks
What attackers are doing with it
Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.
Weakness, pattern, technique
Public exploit references
No public exploit references are available in this record.
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Technologies
Your stack
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Your stack
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