CVE-2020-28361

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 v3.1

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

CVSS v2.0

5.5 MEDIUMAV:N/AC:L/Au:S/C:P/I:P/A:N

EPSS

1.11% chance of exploitation in the next 30 days, 64th percentile

Published

2020-11-18

Updated

2024-08-04

Proof-of-concept exploits (1)

• https://packetstormsecurity.com/files/159030/Kamailio-5.4.0-Header-Smuggling.html

References

• CVE Record
• NVD entry

Related

• CVE-2020-28351
• CVE-2020-28373
• CVE-2020-28349
• CVE-2020-28413
• CVE-2020-28347
• CVE-2020-28423