CVE-2020-27507

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Published Mar 15, 2023 CVSS 3.1 · 9.8 Critical EPSS 1.2% KEV · Not listed

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.

Affected Products

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions

n/a

n/a

affected

Version	Status	Constraints
`n/a`	affected	—

Configuration 1 [-]

cpe:2.3:a:kamailio:kamailio:*:*:*:*:*:*:*:*

No data.

No data available yet.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

Source	ID	Title
Debian DLA	DLA-3438-1	kamailio security update
EUVD	EUVD-2020-20017	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.
Ubuntu USN	USN-6022-1	Kamailio vulnerabilities

Metrics

No CVSS v4.0

Attack Vector Network

Attack Complexity Low

Privileges Required None

Scope Unchanged

Confidentiality Impact High

Integrity Impact High

Availability Impact High

User Interaction None

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

Exploit prediction score: 1.2% (1.176% probability within 30 days)

Exploitation poc

Automatable yes

Technical Impact total

References

Link	Providers
https://github.com/kamailio/kamailio/commit/ada3701d22b1fd579f06b4f54fa695fa988e685f
https://github.com/kamailio/kamailio/issues/2503
https://lists.debian.org/debian-lts-announce/2023/05/msg00030.html

History

Mar 4, 2025 3:45 AM Scoring metrics updated View changes

Type	Values Removed	Values Added
Metrics		ssvc `{'options': {'Automatable': 'yes', 'Exploitation': 'poc', 'Technical Impact': 'total'}, 'version': '2.0.3'}`

Subscriptions

Kamailio Kamailio

Weaknesses

CWE-120

Sources

CVE record Updated: Feb 27, 2025, 6:37 PM

Status: PUBLISHED
Assigner: mitre
Published: Mar 15, 2023, 12:00 AM
Updated: Feb 27, 2025, 6:37 PM
Reserved: Oct 21, 2020, 12:00 AM

View source JSON

Vulnrichment Updated: Aug 4, 2024, 4:18 PM

Updated: Aug 4, 2024, 4:18 PM

NVD Updated: Jun 17, 2026, 3:09 AM

Status: Modified
Published: Mar 15, 2023, 8:15 PM
Modified: Jun 17, 2026, 3:09 AM

View source JSON

Red Hat No data

No data.

OpenCVE enrichment No data

No data.

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