Vulnerability Report

CVE-2021-3909

Title: OctoRPKI Slowloris DoS

Denial of Service

Proof Of Concept

No public PoC currently indexed for CVE-2021-3909.

CWE Category CWE-400
Published Date Nov 11, 2021
Modified Date Nov 21, 2024
Exploit Status Not Found
Score 4.4 CVSS v3.1
Exploit Probability (EPSS)
0.74%

Vulnerability Summary

CVE-2021-3909: OctoRPKI does not limit the length of a connection, allowing for a slowloris DOS attack to take place which makes OctoRPKI wait forever. Specifically, the repository that OctoRPKI sends HTTP requests to will keep the connection open for a day before a response is returned, but does keep drip feeding new bytes to keep the connection alive.

Impacted Vendors

C
cloudflare 1

Reference Links

https://github.com/cloudflare/cfrpki/security/advisories/GHSA-8cvr-4rrf-f244 https://www.debian.org/security/2021/dsa-5033 https://www.debian.org/security/2022/dsa-5041 https://github.com/cloudflare/cfrpki/security/advisories/GHSA-8cvr-4rrf-f244 https://www.debian.org/security/2021/dsa-5033 https://www.debian.org/security/2022/dsa-5041
CVSS v3.1
Source Entity [email protected]
Severity MEDIUM
4.4
Attack Vector
NETWORK
Complexity
HIGH
Privileges
N/A
Interaction
NONE
Confidentiality
N/A
Integrity
N/A
Availability
N/A
Scope
UNCHANGED
RAW VECTOR CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:N/I:N/A:H
CVSS v3.1
Source Entity [email protected]
Severity HIGH
7.5
Attack Vector
NETWORK
Complexity
LOW
Privileges
N/A
Interaction
NONE
Confidentiality
N/A
Integrity
N/A
Availability
N/A
Scope
UNCHANGED
RAW VECTOR CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CVSS v2.0
Source Entity [email protected]
Severity MEDIUM
5.0
Access Vector
N/A
Authentication
N/A
RAW VECTOR AV:N/AC:L/Au:N/C:N/I:N/A:P

Associated Attack Patterns (CAPEC)

Total: Patterns

CVE-2021-3909 Exploits & PoCs (Proof Of Concept)

No public PoCs found in our database for this CVE.

MODIFIED

Vulnerability data or affected products updated.

PUBLISHED

Vulnerability first announced in NVD.

Attack Vector Matrix

Access Vector NETWORK
Complexity HIGH
Privileges N/A
Interaction NONE
CVSS Vector String CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:N/I:N/A:H

Affected Stack

No specific products linked.