CVE-2023-27598

OpenSIPS is a Session Initiation Protocol (SIP) server implementation. Prior to versions 3.1.7 and 3.2.4, sending a malformed `Via` header to OpenSIPS triggers a segmentation fault when the function `calc_tag_suffix` is called. A specially crafted `Via` header, which is deemed correct by the parser, will pass uninitialized strings to the function `MD5StringArray` which leads to the crash. Abuse of this vulnerability leads to Denial of Service due to a crash. Since the uninitialized string points to memory location `0x0`, no further exploitation appears to be possible. No special network privileges are required to perform this attack, as long as the OpenSIPS configuration makes use of functions such as `sl_send_reply` or `sl_gen_totag` that trigger the vulnerable code. This issue has been fixed in versions 3.1.7 and 3.2.4.

CVSS v3.0 7.5 HIGH

7.5^/10

CVSS v3.0 : HIGH

Vector :

Exploitability : 3.9 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://github.com/OpenSIPS/opensips/commit/ab611f74f69d9c42be5401c40d56ea06a58f5dd7	Patch Third Party Advisory
https://github.com/OpenSIPS/opensips/security/advisories/GHSA-wxfg-3gwh-rhvx	Third Party Advisory
https://opensips.org/pub/audit-2022/opensips-audit-technical-report-full.pdf	Third Party Advisory

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Configurations

Configuration 1 (hide)

OR	cpe:2.3:a:opensips:opensips::::::::
	cpe:2.3:a:opensips:opensips::::::::

Information

Published : 2023-03-15 14:15

Updated : 2023-03-21 12:14

NVD link : CVE-2023-27598

Mitre link : CVE-2023-27598

JSON object : View

CWE

CWE-908

Use of Uninitialized Resource

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Products Affected

opensips

opensips

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