What is CVE-2020-27507?

CVE-2020-27507 is a critical-severity vulnerability in Kamailio, classified under Buffer Copy without Checking Size of Input (Classic Buffer Overflow). CVSS score: 9.8/10. Published 2023-03-15.

How severe is CVE-2020-27507?

Critical severity. CVSS v3 base score is 9.8 out of 10.

Is CVE-2020-27507 known to be exploited?

1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

Buffer overflow in Kamailio

CVE-2020-27507

The Kamailio SIP before 5.5.0 server mishandles INVITE requests with duplicated fields and overlength tag, leading to a buffer overflow that crashes the server or possibly have unspecified other impact.

Vulnerability class: Buffer Overflow

EPSS: 0.012 (64.4th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

Affected products

Kamailio
N/a — versions n/a

Weakness classification (CWE)

CWE-120 — Buffer Copy without Checking Size of Input (Classic Buffer Overflow)

Public proof-of-concept exploits

ARPSyndicate/cvemon

References

cve@mitre.org (Exploit, Issue Tracking)
cve@mitre.org (Patch)
cve@mitre.org (mailing-list)

Frequently asked questions

What is CVE-2020-27507?: CVE-2020-27507 is a critical-severity vulnerability in Kamailio, classified under Buffer Copy without Checking Size of Input (Classic Buffer Overflow). CVSS score: 9.8/10. Published 2023-03-15.
How severe is CVE-2020-27507?: Critical severity. CVSS v3 base score is 9.8 out of 10.
Is CVE-2020-27507 known to be exploited?: 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.