HTTP Request Smuggling Affecting kamailio package, versions [,5.4.0)


Severity

Recommended
0.0
medium
0
10

CVSS assessment by Snyk's Security Team. Learn more

Threat Intelligence

EPSS
0.14% (34th percentile)

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  • Snyk IDSNYK-UNMANAGED-KAMAILIO-2381913
  • published26 Jan 2022
  • disclosed18 Nov 2020
  • creditUnknown

Introduced: 18 Nov 2020

CVE-2020-28361  (opens in a new tab)
CWE-444  (opens in a new tab)

How to fix?

Upgrade kamailio to version 5.4.0 or higher.

Overview

Affected versions of this package are vulnerable to HTTP Request Smuggling. 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.

References

CVSS Base Scores

version 3.1