OpenSSL up to 1.0.1t/1.0.2h Certificate Parser s3_clnt.c/s3_srvr.c out-of-bounds

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.
4.7	$0-$5k	0.00

Summaryinfo

A vulnerability marked as problematic has been reported in OpenSSL up to 1.0.1t/1.0.2h. Affected is an unknown function of the file s3_clnt.c/s3_srvr.c of the component Certificate Parser. The manipulation leads to out-of-bounds. This vulnerability is documented as CVE-2016-6306. The attack can be initiated remotely. There is not any exploit available. It is suggested to upgrade the affected component.

Detailsinfo

A vulnerability was found in OpenSSL up to 1.0.1t/1.0.2h (Network Encryption Software) and classified as problematic. This issue affects an unknown code of the file s3_clnt.c/s3_srvr.c of the component Certificate Parser. The manipulation with an unknown input leads to a out-of-bounds vulnerability. Using CWE to declare the problem leads to CWE-125. The product reads data past the end, or before the beginning, of the intended buffer. Impacted is availability. The summary by CVE is:

The certificate parser in OpenSSL before 1.0.1u and 1.0.2 before 1.0.2i might allow remote attackers to cause a denial of service (out-of-bounds read) via crafted certificate operations, related to s3_clnt.c and s3_srvr.c.

The bug was discovered 09/22/2016. The weakness was released 09/26/2016 by Shi Lei with Qihoo 360 as USN-3087-1 (Website). The advisory is shared at kb.juniper.net. The identification of this vulnerability is CVE-2016-6306 since 07/26/2016. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. Technical details are known, but no exploit is available.

The vulnerability was handled as a non-public zero-day exploit for at least 4 days. During that time the estimated underground price was around $5k-$25k. The vulnerability scanner Nessus provides a plugin with the ID 95255 (AIX OpenSSL Advisory : openssl_advisory21.asc (SWEET32)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family AIX Local Security Checks and running in the context l. The commercial vulnerability scanner Qualys is able to test this issue with plugin 316384 (Cisco Unity Express OpenSSL Multiple Vulnerabilities (cisco-sa-20160927-openssl)).

Upgrading to version 1.0.1u or 1.0.2i eliminates this vulnerability. A possible mitigation has been published 2 months after the disclosure of the vulnerability.

The vulnerability is also documented in the databases at Tenable (95255) and SecurityFocus (BID 93153†). Entries connected to this vulnerability are available at VDB-87879, VDB-88080, VDB-90396 and VDB-90937. Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

Type

• Network Encryption Software

Name

• OpenSSL

Version

• 1.0.1a
• 1.0.1b
• 1.0.1c
• 1.0.1d
• 1.0.1e
• 1.0.1f
• 1.0.1g
• 1.0.1h
• 1.0.1i
• 1.0.1j
• 1.0.1k
• 1.0.1l
• 1.0.1m
• 1.0.1n
• 1.0.1o
• 1.0.1p
• 1.0.1q
• 1.0.1r
• 1.0.1s
• 1.0.1t
• 1.0.2
• 1.0.2a
• 1.0.2b
• 1.0.2c
• 1.0.2d
• 1.0.2e
• 1.0.2f
• 1.0.2g
• 1.0.2h

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: 4.8
VulDB Meta Temp Score: 4.7

VulDB Base Score: 3.7
VulDB Temp Score: 3.6
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 5.9
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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Unlock	Unlock	Unlock	Unlock	Unlock	Unlock

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: 🔍

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

Nessus ID: 95255
Nessus Name: AIX OpenSSL Advisory : openssl_advisory21.asc (SWEET32)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

OpenVAS ID: 59958
OpenVAS Name: RedHat Update for openssl RHSA-2016:1940-01
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 1.0.1u/1.0.2i
Patch: 52e623c4cb06fffa9d5e75c60b34b4bc130b12e9

Timelineinfo

07/26/2016 🔍
09/22/2016 +58 days 🔍
09/23/2016 +1 days 🔍
09/26/2016 +3 days 🔍
09/26/2016 +0 days 🔍
09/27/2016 +1 days 🔍
11/14/2016 +48 days 🔍
11/22/2016 +8 days 🔍
09/21/2022 +2129 days 🔍

Sourcesinfo

Product: openssl.org

Advisory: USN-3087-1
Researcher: Shi Lei
Organization: Qihoo 360
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2016-6306 (🔍)
GCVE (CVE): GCVE-0-2016-6306
GCVE (VulDB): GCVE-100-92201

OVAL: 🔍

SecurityFocus: 93153 - OpenSSL CVE-2016-6306 Local Denial of Service Vulnerability
SecurityTracker: 1036885

See also: 🔍

Entryinfo

Created: 09/27/2016 10:49
Updated: 09/21/2022 13:47
Changes: 09/27/2016 10:49 (78), 07/07/2019 17:25 (10), 09/21/2022 13:47 (6)
Complete: 🔍
Cache ID: 216:727:103

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

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