Is CVE-2020-28361 in the CISA KEV catalog?

No. CVE-2020-28361 is not currently on the CISA Known Exploited Vulnerabilities list.

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

CVE-2020-28361 has a CVSS v3 base score of 5.4 (MEDIUM).

What is the EPSS score for CVE-2020-28361?

CVE-2020-28361 has an EPSS score of 1.09% (62th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2020-28361?

Upgrade kamailio on debian 11 to 5.4.0-1 or later. Fixes are available for 2 affected products.

CVE & CISA-KEV Catalog

CVE-2020-28361

MEDIUM

5.4

CVSS v3

NVD

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.

CWE-444

How to fix

Remediation Available

kamailioDebian

Fixed in:5.4.0-1CVE-2020-28361

kamailioUbuntu

Fixed in:4.3.4-1.1ubuntu2.1+esm2USN-7416-1

Fixed in:5.1.2-1ubuntu2+esm2USN-7416-1

Fixed in:5.3.2-1ubuntu0.1~esm2USN-7416-1

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredLow

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityLow

IntegrityLow

AvailabilityNone

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

Exploit Intelligence

1.09%probability of exploitation in 30 days

62ndpercentile

Moderate risk: more likely to be exploited than 62% of all known CVEs.

References

Exploit1

packetstormsecurity.com

Other references1

support.sippysoft.com

Related Vulnerabilities

Other CWE-444 vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2022-22536	Critical	10.0	98%	KEV	-
CVE-2025-61884	High	7.5	98%	KEV + Ransom	-
CVE-2020-9490	High	7.5	90%	-	Fix
CVE-2023-41265	Critical	9.6	85%	KEV + Ransom	-
CVE-2023-25690	Critical	9.8	84%	-	Fix
CVE-2022-32214	Medium	6.5	78%	-	Fix

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2024-11-21.