Service interruption via Service-Route pointer overflow
Published Sep 4, 2026 · Updated Sep 4, 2026
Stack-based buffer overflow in PJPROJECT 2.17 and earlier allows remote attackers to crash PJSUA applications via registration responses. The update_service_route() function appends Service-Route URI pointers from a 2xx REGISTER response to a fixed-size stack array without checking the cumulative header count before each write. Exposure requires the PJSUA or PJSUA2 account registration path and control of the registrar, or response spoofing over an unprotected transport; the expected consequence is application termination.
Summary
What happened
Stack-based buffer overflow in PJPROJECT 2.17 and earlier allows remote attackers to crash PJSUA applications via registration responses. The update_service_route() function appends Service-Route URI pointers from a 2xx REGISTER response to a fixed-size stack array without checking the cumulative header count before each write. Exposure requires the PJSUA or PJSUA2 account registration path and control of the registrar, or response spoofing over an unprotected transport; the expected consequence is application termination.
The record
- CVE
- CVE-2026-57161
- Published
- Sep 4, 2026
- Updated
- Sep 4, 2026
- Vendor
- PJSIP
- Product
- PJPROJECT
- Classifications
- CWE-121, T1499.004
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Sep 4, 2026CVE publishedPublication date reported by the CVE source.
- Sep 4, 2026Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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- Affected versionversion=< acc03b57cef7a7d31b8e1f5b9117437d7e87c591
What conditions does exploitation require?
What is affected?
Published CVSS scores
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Attacks
What attackers are doing with it
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Public exploit references
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Technologies
Your stack
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Your stack
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