CWE
444
Advisory Published
Updated

CVE-2020-28361

First published: Wed Nov 18 2020(Updated: )

Kamailio before 5.4.0, as used in Sip Express Router (SER) in Sippy Softswitch 4.5 through 5.2 and other products, allows a bypass of a header-removal protection mechanism via whitespace characters. This occurs in the remove_hf function in the Kamailio textops module. Particular use of remove_hf in Sippy Softswitch may allow skilled attacker having a valid credential in the system to disrupt internal call start/duration accounting mechanisms leading potentially to a loss of revenue.

Credit: cve@mitre.org

Affected SoftwareAffected VersionHow to fix
Kamailio<5.4.0

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Frequently Asked Questions

  • What is the severity of CVE-2020-28361?

    CVE-2020-28361 is classified as a medium severity vulnerability that allows for header-removal protection bypass.

  • How do I fix CVE-2020-28361?

    To resolve CVE-2020-28361, upgrade to Kamailio version 5.4.0 or later, which addresses the vulnerability.

  • What systems are affected by CVE-2020-28361?

    CVE-2020-28361 affects Kamailio versions prior to 5.4.0, as well as products using these versions such as Sippy Softswitch 4.5 through 5.2.

  • What is the impact of CVE-2020-28361?

    The impact of CVE-2020-28361 is that it allows attackers to manipulate HTTP headers, potentially leading to security vulnerabilities like header injection.

  • Who is responsible for the CVE-2020-28361 vulnerability?

    The CVE-2020-28361 vulnerability is a result of insufficient header-removal protection in the Kamailio textops module.

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