CVE-2020-28361 Information

Description

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.

CVSS Vector

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N

Reference

https://support.sippysoft.com/support/discussions/topics/3000179616 https://packetstormsecurity.com/files/159030/Kamailio-5.4.0-Header-Smuggling.html

Attack Complexity

LOW

Privileges Required

LOW

User Interaction Required

LOW

Scope

NONE

Confidentiality Impact

UNCHANGED

Integrity Impact

LOW

Availability Impact

LOW

Base Score

NONE

Base Severity

5.4