VDB-244553 · CVE-2023-41378 · tta-2023-001

Calico/Tigera Typha TLS Handshake resource consumption

CVSS Meta Temp Score CVSS is a standardized scoring system to determine possibilities of attacks. The Temp Score considers temporal factors like disclosure, exploit and countermeasures. The unique Meta Score calculates the average score of different sources to provide a normalized scoring system.	Current Exploit Price (≈) Our analysts are monitoring exploit markets and are in contact with vulnerability brokers. The range indicates the observed or calculated exploit price to be seen on exploit markets. A good indicator to understand the monetary effort required for and the popularity of an attack.	CTI Interest Score Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.
6.4	$0-$5k	0.00

Summaryinfo

A vulnerability, which was classified as problematic, has been found in Calico/Tigera Typha. Affected by this issue is the function Handshake of the component TLS Handshake Handler. The manipulation leads to resource consumption. This vulnerability is listed as CVE-2023-41378. The attack may be initiated remotely. There is no available exploit.

Detailsinfo

A vulnerability was found in Calico/Tigera Typha (affected version unknown) and classified as problematic. This issue affects the function Handshake of the component TLS Handshake Handler. The manipulation with an unknown input leads to a resource consumption vulnerability. Using CWE to declare the problem leads to CWE-400. The product does not properly control the allocation and maintenance of a limited resource, thereby enabling an actor to influence the amount of resources consumed, eventually leading to the exhaustion of available resources. Impacted is availability. The summary by CVE is:

In certain conditions for Calico Typha (v3.26.2, v3.25.1 and below), and Calico Enterprise Typha (v3.17.1, v3.16.3, v3.15.3 and below), a client TLS handshake can block the Calico Typha server indefinitely, resulting in denial of service. The TLS Handshake() call is performed inside the main server handle for loop without any timeout allowing an unclean TLS handshake to block the main loop indefinitely while other connections will be idle waiting for that handshake to finish.

The weakness was presented 11/06/2023 by Rodrigo Fior Kuntzer as tta-2023-001. The advisory is shared at tigera.io. The identification of this vulnerability is CVE-2023-41378 since 08/29/2023. Technical details are known, but no exploit is available. MITRE ATT&CK project uses the attack technique T1499 for this issue.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

Vendor

Name

Typha

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.4
VulDB Meta Temp Score: 6.4

VulDB Base Score: 5.3
VulDB Temp Score: 5.3
VulDB Vector: 🔍
VulDB Reliability: 🔍

CNA Base Score: 7.5
CNA Vector (Tigera, Inc.): 🔍

CVSSv2info

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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

Exploitinginfo

Class: Resource consumption
CWE: CWE-400 / CWE-404
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔍

Patch: github.com

Timelineinfo

08/29/2023 🔍
11/06/2023 +69 days 🔍
11/06/2023 +0 days 🔍
12/02/2023 +26 days 🔍

Sourcesinfo

Advisory: tta-2023-001
Researcher: Rodrigo Fior Kuntzer
Status: Confirmed

CVE: CVE-2023-41378 (🔍)
GCVE (CVE): GCVE-0-2023-41378
GCVE (VulDB): GCVE-100-244553

Entryinfo

Created: 11/06/2023 16:31
Updated: 12/02/2023 14:18
Changes: 11/06/2023 16:31 (49), 12/02/2023 14:13 (1), 12/02/2023 14:18 (1)
Complete: 🔍
Cache ID: 216::103