wolfSSL up to 4.4.x CCS ProcessReply Messages input validation

CVSS Meta Temp Score
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CTI Interest Score
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5.6$0-$5k0.00

A vulnerability classified as problematic was found in wolfSSL up to 4.4.x. This vulnerability affects the function ProcessReply of the component CCS Handler. The manipulation as part of a Messages leads to a input validation vulnerability. The CWE definition for the vulnerability is CWE-20. The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly. As an impact it is known to affect availability. CVE summarizes:

An issue was discovered in wolfSSL before 4.5.0. It mishandles the change_cipher_spec (CCS) message processing logic for TLS 1.3. If an attacker sends ChangeCipherSpec messages in a crafted way involving more than one in a row, the server becomes stuck in the ProcessReply() loop, i.e., a denial of service.

The weakness was presented 08/21/2020 (GitHub Repository). The advisory is available at github.com. This vulnerability was named CVE-2020-12457 since 04/29/2020. The exploitation appears to be easy. The attack can be initiated remotely. No form of authentication is required for a successful exploitation. Technical details are known, but there is no available exploit.

Upgrading to version 4.5.0 eliminates this vulnerability.

See 160143 for similar entry.

Productinfo

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Version

License

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB CVSS-B Score: 🔍
VulDB CVSS-BT Score: 🔍
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.4
VulDB Meta Temp Score: 6.1

VulDB Base Score: 5.3
VulDB Temp Score: 4.7
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 7.5
NVD Vector: 🔍

CVSSv2info

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

NVD Base Score: 🔍

Exploitinginfo

Class: Input validation
CWE: CWE-20
ATT&CK: Unknown

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: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: wolfSSL 4.5.0

Timelineinfo

04/29/2020 🔍
08/21/2020 +114 days 🔍
08/22/2020 +1 days 🔍
11/10/2020 +80 days 🔍

Sourcesinfo

Advisory: github.com
Status: Not defined
Confirmation: 🔍

CVE: CVE-2020-12457 (🔍)
See also: 🔍

Entryinfo

Created: 08/22/2020 09:02
Updated: 11/10/2020 22:03
Changes: 08/22/2020 09:02 (41), 08/22/2020 09:07 (17), 11/10/2020 22:03 (1)
Complete: 🔍

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