CVE-2026-0710
Unknown Unknown - Not Provided
NULL Pointer Dereference in SIPp Causes Remote DoS, Code Execution

Publication date: 2026-01-23

Last updated on: 2026-01-23

Assigner: Fedora Project

Description
A flaw was found in SIPp. A remote attacker could exploit this by sending specially crafted Session Initiation Protocol (SIP) messages during an active call. This vulnerability, a NULL pointer dereference, can cause the application to crash, leading to a denial of service. Under specific conditions, it may also allow an attacker to execute unauthorized code, compromising the system's integrity and availability.
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Meta Information
Published
2026-01-23
Last Modified
2026-01-23
Generated
2026-06-16
AI Q&A
2026-01-23
EPSS Evaluated
2026-06-14
NVD
CVE-2026-0710
EUVD
EUVD-2026-4491
Affected Vendors & Products
Showing 2 associated CPEs
Vendor Product Version / Range
unknown_vendor sipp to 3.7.6 (exc)
unknown_vendor sipp From 3.7.6 (inc)
Helpful Resources
Exploitability
CWE
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KEV
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CWE ID Description
CWE-476 The product dereferences a pointer that it expects to be valid but is NULL.
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Executive Summary

This vulnerability in SIPp is caused by a NULL pointer dereference in the SendingMessage function when processing specially crafted SIP messages during an active call. It results from insufficient validation of internal message structures, causing the application to crash (segmentation fault). Under certain memory layouts and runtime conditions, this crash can be exploited to execute arbitrary code locally, compromising system integrity and availability. [1]

Impact Analysis

The vulnerability can cause SIPp to crash, leading to a denial of service. Additionally, under specific conditions, an attacker may exploit it to execute unauthorized code locally, which can compromise the system's integrity and availability. [1]

Detection Guidance

This vulnerability can be detected by monitoring for crashes or segmentation faults in SIPp when processing SIP messages, especially during active calls. Detection can also involve replaying specially crafted malformed SIP messages or using AFLNet replay tooling to trigger the NULL pointer dereference. Specific commands are not provided, but using AFLNet or similar fuzzing/replay tools against SIPp version 3.7.3 can help identify the issue. [1]

Mitigation Strategies

The immediate mitigation step is to upgrade SIPp to version 3.7.6 or later, where the vulnerability has been fixed by initializing previously uninitialized members in the SendingMessage class. Until the upgrade, avoid processing untrusted or malformed SIP messages during active calls to reduce the risk of exploitation. [1]

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