OpenSSL up to 1.0.2j/1.1.0c on 32-bit CHACHA20/POLY1305 out-of-bounds

CVSS Meta Temp Score
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CTI Interest Score
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7.2$0-$5k0.00

Summaryinfo

A vulnerability labeled as critical has been found in OpenSSL up to 1.0.2j/1.1.0c on 32-bit. The affected element is an unknown function of the component CHACHA20/POLY1305. The manipulation results in out-of-bounds. This vulnerability is identified as CVE-2017-3731. The attack can be executed remotely. There is not any exploit available. The affected component should be upgraded.

Detailsinfo

A vulnerability was found in OpenSSL up to 1.0.2j/1.1.0c on 32-bit (Network Encryption Software). It has been classified as critical. Affected is an unknown part of the component CHACHA20/POLY1305. The manipulation with an unknown input leads to a out-of-bounds vulnerability. CWE is classifying the issue as CWE-125. The product reads data past the end, or before the beginning, of the intended buffer. This is going to have an impact on confidentiality, integrity, and availability.

The bug was discovered 01/26/2017. The weakness was released 01/26/2017 by Robert Święcki with Google as 20170126.txt as confirmed security advisory (Website). The advisory is shared for download at openssl.org. The public release was coordinated with the vendor. This vulnerability is traded as CVE-2017-3731 since 12/16/2016. It is possible to launch the attack remotely. The exploitation doesn't require any form of authentication. There are neither technical details nor an exploit publicly available. The advisory points out:

If an SSL/TLS server or client is running on a 32-bit host, and a specific cipher is being used, then a truncated packet can cause that server or client to perform an out-of-bounds read, usually resulting in a crash.

The vulnerability was handled as a non-public zero-day exploit for at least 74 days. During that time the estimated underground price was around $5k-$25k. The vulnerability scanner Nessus provides a plugin with the ID 99874 (EulerOS 2.0 SP1 : openssl (EulerOS-SA-2017-1029)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Huawei Local Security Checks and running in the context l. The commercial vulnerability scanner Qualys is able to test this issue with plugin 175949 (Debian Security Update for openssl (DSA 3773-1)).

Upgrading to version 1.0.2k or 1.1.0d eliminates this vulnerability. A possible mitigation has been published immediately after the disclosure of the vulnerability.

The vulnerability is also documented in the databases at Tenable (99874), SecurityFocus (BID 95813†) and SecurityTracker (ID 1037717†). Further details are available at mta.openssl.org. Entries connected to this vulnerability are available at VDB-93073, VDB-95275, VDB-96037 and VDB-96038. Once again VulDB remains the best source for vulnerability data.

Productinfo

Type

Name

Version

License

Support

  • end of life (old version)

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 7.4
VulDB Meta Temp Score: 7.2

VulDB Base Score: 7.3
VulDB Temp Score: 7.0
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 7.5
NVD Vector: 🔍

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Class: Out-of-bounds
CWE: CWE-125 / CWE-119
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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Nessus ID: 99874
Nessus Name: EulerOS 2.0 SP1 : openssl (EulerOS-SA-2017-1029)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

OpenVAS ID: 881932
OpenVAS Name: CentOS Update for openssl CESA-2017:0286 centos7
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

Reaction Time: 🔍
0-Day Time: 🔍
Exposure Time: 🔍

Upgrade: OpenSSL 1.0.2k/1.1.0d
Patch: github.com

Timelineinfo

11/13/2016 🔍
12/16/2016 +33 days 🔍
01/26/2017 +41 days 🔍
01/26/2017 +0 days 🔍
01/26/2017 +0 days 🔍
01/26/2017 +0 days 🔍
01/26/2017 +0 days 🔍
01/27/2017 +1 days 🔍
05/01/2017 +94 days 🔍
05/04/2017 +3 days 🔍
11/04/2022 +2010 days 🔍

Sourcesinfo

Product: openssl.org

Advisory: 20170126.txt
Researcher: Robert Święcki
Organization: Google
Status: Confirmed
Confirmation: 🔍
Coordinated: 🔍

CVE: CVE-2017-3731 (🔍)
GCVE (CVE): GCVE-0-2017-3731
GCVE (VulDB): GCVE-100-96036

OVAL: 🔍

SecurityFocus: 95813 - OpenSSL CVE-2017-3731 Denial of Service Vulnerability
OSVDB: - CVE-2017-3731 - OpenSSL - Out-of-Bounds Read Issue
SecurityTracker: 1037717

Misc.: 🔍
See also: 🔍

Entryinfo

Created: 01/27/2017 08:16
Updated: 11/04/2022 09:45
Changes: 01/27/2017 08:16 (79), 08/04/2020 17:55 (17), 11/04/2022 09:45 (5)
Complete: 🔍
Cache ID: 216::103

Once again VulDB remains the best source for vulnerability data.

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