CVE-2023-28098: OpenSIPS has vulnerability in the Digest Authentication Parser

Severity: high (CVSS 7.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.9% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2023-03-15 · updated 2026-06-17
Weakness: CWE-20

Description

OpenSIPS is a Session Initiation Protocol (SIP) server implementation. Prior to versions 3.1.7 and 3.2.4, a specially crafted Authorization header causes OpenSIPS to crash or behave in an unexpected way due to a bug in the function `parse_param_name()` . This issue was discovered while performing coverage guided fuzzing of the function parse_msg. The AddressSanitizer identified that the issue occurred in the function `q_memchr()` which is being called by the function `parse_param_name()`. This issue may cause erratic program behaviour or a server crash. It affects configurations containing functions that make use of the affected code, such as the function `www_authorize()` . Versions 3.1.7 and 3.2.4 contain a fix.

Affected products

opensips: before 3.1.7; from 3.2.0 before 3.2.4 — fixed in 3.1.7, 3.2.4

How to fix

Upgrade to a fixed version: opensips 3.1.7, 3.2.4. Check the vendor advisory for mitigations.

References

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