CVE-2020-27507 describes a critical buffer overflow vulnerability in Kamailio SIP server versions prior to 5.5.0. This flaw allows an unauthenticated attacker to crash the server or potentially achieve further impact by sending specially crafted INVITE requests containing duplicated fields and an overlong tag. With a CVSS score of 9.8, this vulnerability is easily exploitable over the network with low attack complexity, posing a significant risk to confidentiality, integrity, and availability. While no public exploits or active exploitation have been observed, and community discussion is minimal, the high severity warrants immediate patching.
| Vendor | Product | Version(s) | CPE |
|---|---|---|---|
< 5.5.0CPE matchmatch criteria | cpe:2.3:a:kamailio:kamailio:*:*:*:*:*:*:*:* |
CVSS version used by this source: 3.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
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The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.