OpenSSL 1.0.2 Client Authentication ClientKeyExchange Message input validation

CVSS Meta Temp Score
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CTI Interest Score
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4.6$0-$5k0.00

Summaryinfo

A vulnerability was found in OpenSSL 1.0.2. It has been declared as problematic. Affected by this vulnerability is an unknown functionality of the component Client Authentication Handler. The manipulation as part of ClientKeyExchange Message results in input validation. This vulnerability is reported as CVE-2015-1787. No exploit exists. It is recommended to upgrade the affected component.

Detailsinfo

A vulnerability classified as problematic has been found in OpenSSL 1.0.2 (Network Encryption Software). Affected is some unknown processing of the component Client Authentication Handler. The manipulation as part of a ClientKeyExchange Message leads to a input validation vulnerability. CWE is classifying the issue as 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. This is going to have an impact on availability.

The issue has been introduced in 03/19/2015. The weakness was disclosed 03/19/2015 as secadv_20150319.txt as confirmed advisory (Website). The advisory is shared for download at openssl.org. This vulnerability is traded as CVE-2015-1787 since 02/17/2015. The exploitability is told to be easy. 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 vulnerability scanner Nessus provides a plugin with the ID 82010 (GLSA-201503-11 : OpenSSL: Multiple vulnerabilities (FREAK)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Gentoo Local Security Checks and running in the context l. The commercial vulnerability scanner Qualys is able to test this issue with plugin 11761 (Splunk Enterprise OpenSSL Multiple Vulnerabilities (SP-CAAAN4P)).

Upgrading to version 1.0.2a eliminates this vulnerability. A possible mitigation has been published immediately after the disclosure of the vulnerability. Furthermore it is possible to detect and prevent this kind of attack with TippingPoint and the filter 19731.

The vulnerability is also documented in the databases at X-Force (101672), Tenable (82010), SecurityFocus (BID 73238†), SecurityTracker (ID 1031929†) and Vulnerability Center (SBV-56906†). Further details are available at grahamcluley.com. The entries VDB-74043, VDB-74044, VDB-74045 and VDB-74046 are pretty similar. Once again VulDB remains the best source for vulnerability data.

Productinfo

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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: 5.3
VulDB Meta Temp Score: 4.6

VulDB Base Score: 5.3
VulDB Temp Score: 4.6
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

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

NVD Base Score: 🔍

Exploitinginfo

Class: Input validation
CWE: CWE-20
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Unproven

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 82010
Nessus Name: GLSA-201503-11 : OpenSSL: Multiple vulnerabilities (FREAK)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

OpenVAS ID: 902837
OpenVAS Name: OpenSSL Multiple Vulnerabilities -01 Nov15 (Linux)
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 1.0.2a
Patch: b19d8143212ae5fbc9cebfd51c01f802fabccd33
TippingPoint: 🔍

McAfee IPS: 🔍
McAfee IPS Version: 🔍

Fortigate IPS: 🔍

Timelineinfo

02/17/2015 🔍
03/16/2015 +27 days 🔍
03/18/2015 +2 days 🔍
03/19/2015 +0 days 🔍
03/19/2015 +0 days 🔍
03/19/2015 +0 days 🔍
03/19/2015 +0 days 🔍
03/20/2015 +1 days 🔍
03/23/2015 +3 days 🔍
07/20/2015 +118 days 🔍
03/01/2016 +226 days 🔍
04/15/2022 +2235 days 🔍

Sourcesinfo

Product: openssl.org

Advisory: secadv_20150319.txt
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2015-1787 (🔍)
GCVE (CVE): GCVE-0-2015-1787
GCVE (VulDB): GCVE-100-74052
X-Force: 101672 - OpenSSL client auth denial of service
SecurityFocus: 73238 - OpenSSL 'ssl/s3_srvr.c' Denial of Service Vulnerability
SecurityTracker: 1031929
Vulnerability Center: 56906 - OpenSSL Remote DoS via ClientKeyExchange Message with a Length of Zero - CVE-2015-1787, Low

Misc.: 🔍
See also: 🔍

Entryinfo

Created: 03/20/2015 09:52
Updated: 04/15/2022 21:48
Changes: 03/20/2015 09:52 (75), 08/25/2018 09:21 (15), 04/15/2022 21:48 (5)
Complete: 🔍
Cache ID: 216::103

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