CVE-2020-27507

CRITICAL EPSS 63.7%
Published Mar 15, 20233y ago · Modified Jun 17, 20262w ago
9.8 CVSS 3.1
Critical
Find Similar
Published Mar 15, 2023 3y ago
Last Modified Jun 17, 2026 2w ago

Description

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.

CVSS Details

Base Score
9.8
Exploitability
3.9
Impact
5.9
Vector string
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack Vector Network
Attack Complexity Low
Privileges Required None
User Interaction None
Scope Unchanged
Confidentiality High
Integrity High
Availability High

Threat Intelligence

EPSS Exploit Probability
63.7% percentile
Exploit & Patch Status
Public Exploit Known
Patch Available

Weaknesses 1

CWE-120

Affected Products 1

VendorProductVersionRange
kamailiokamailio* <5.5.0

References 3

  • github.com https://github.com/kamailio/kamailio/commit/ada3701d22b1fd579f06b4f54fa695fa988e685f
    Patch
  • github.com https://github.com/kamailio/kamailio/issues/2503
    ExploitIssue Tracking
  • lists.debian.org https://lists.debian.org/debian-lts-announce/2023/05/msg00030.html

Remediation

  • github.com https://github.com/kamailio/kamailio/commit/ada3701d22b1fd579f06b4f54fa695fa988e685f
    Patch