OpenSSL 1.1.0 Empty Record SSL_peek Hang denial of service

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.
5.3	$0-$5k	0.00

Summaryinfo

A vulnerability, which was classified as problematic, was found in OpenSSL 1.1.0. This issue affects the function SSL_peek of the component Empty Record Handler. Such manipulation leads to denial of service (Hang). This vulnerability is listed as CVE-2016-6305. There is no available exploit. You should upgrade the affected component.

Detailsinfo

A vulnerability was found in OpenSSL 1.1.0 (Network Encryption Software). It has been rated as problematic. Affected by this issue is the function SSL_peek of the component Empty Record Handler. The manipulation with an unknown input leads to a denial of service vulnerability (Hang). Using CWE to declare the problem leads to CWE-404. The product does not release or incorrectly releases a resource before it is made available for re-use. Impacted is availability.

The weakness was presented 09/22/2016 by Alex Gaynor as 20160922.txt as confirmed advisory (Website). The advisory is available at openssl.org. This vulnerability is handled as CVE-2016-6305 since 07/26/2016. Technical details are known, but there is no available exploit.

The commercial vulnerability scanner Qualys is able to test this issue with plugin 38636 (OpenSSL Multiple Vulnerabilities (OpenSSL Security Advisory 20160922)).

Upgrading to version 1.1.0a eliminates this vulnerability. A possible mitigation has been published immediately after the disclosure of the vulnerability.

The vulnerability is also documented in the vulnerability database at SecurityFocus (BID 93149†). See VDB-87879, VDB-88080, VDB-90937 and VDB-90940 for similar entries. If you want to get best quality of vulnerability data, you may have to visit VulDB.

Productinfo

Type

• Network Encryption Software

Name

• OpenSSL

Version

• 1.1.0

License

• open-source

Support

• end of life (old version)

Website

• Product: https://www.openssl.org/

CPE 2.3info

• 🔍

CPE 2.2info

• 🔍

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.4
VulDB Meta Temp Score: 5.3

VulDB Base Score: 3.3
VulDB Temp Score: 3.2
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 7.5
NVD Vector: 🔍

CVSSv2info

AV	AC	Au	C	I	A
💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳

Vector	Complexity	Authentication	Confidentiality	Integrity	Availability
Unlock	Unlock	Unlock	Unlock	Unlock	Unlock
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Name: Hang
Class: Denial of service / Hang
CWE: CWE-404
CAPEC: 🔍
ATT&CK: 🔍

Physical: Partially
Local: Yes
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

0-Day	Unlock	Unlock	Unlock	Unlock
Today	Unlock	Unlock	Unlock	Unlock

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 1.1.0a
Patch: 63658103d4441924f8dbfc517b99bb54758a98b9

Timelineinfo

07/26/2016 🔍
09/22/2016 +58 days 🔍
09/22/2016 +0 days 🔍
09/22/2016 +0 days 🔍
09/23/2016 +1 days 🔍
09/25/2024 +2924 days 🔍

Sourcesinfo

Product: openssl.org

Advisory: 20160922.txt
Researcher: Alex Gaynor
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2016-6305 (🔍)
GCVE (CVE): GCVE-0-2016-6305
GCVE (VulDB): GCVE-100-91898
SecurityFocus: 93149 - OpenSSL CVE-2016-6305 Denial of Service Vulnerability
SecurityTracker: 1036879

See also: 🔍

Entryinfo

Created: 09/23/2016 18:11
Updated: 09/25/2024 18:02
Changes: 09/23/2016 18:11 (50), 07/07/2019 16:28 (6), 09/20/2022 09:39 (23), 09/25/2024 18:02 (16)
Complete: 🔍
Cache ID: 216::103

If you want to get best quality of vulnerability data, you may have to visit VulDB.

Discussion

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