OpenSSL up to 1.1.0 record/rec_layer_s3.c ssl3_read_bytes input validation

CVSS Meta Temp Score
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CTI Interest Score
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6.3$0-$5k0.00

Summaryinfo

A vulnerability labeled as problematic has been found in OpenSSL up to 1.1.0. This impacts the function ssl3_read_bytes of the file record/rec_layer_s3.c. Executing a manipulation can lead to input validation. This vulnerability is registered as CVE-2016-6305. It is possible to launch the attack remotely. No exploit is available. The affected component should be upgraded.

Detailsinfo

A vulnerability has been found in OpenSSL up to 1.1.0 (Network Encryption Software) and classified as problematic. This vulnerability affects the function ssl3_read_bytes of the file record/rec_layer_s3.c. The manipulation with an unknown input 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:

The ssl3_read_bytes function in record/rec_layer_s3.c in OpenSSL 1.1.0 before 1.1.0a allows remote attackers to cause a denial of service (infinite loop) by triggering a zero-length record in an SSL_peek call.

The weakness was published 09/26/2016 (Website). The advisory is shared for download at kb.juniper.net. This vulnerability was named CVE-2016-6305. The exploitation appears to be easy. The attack can be initiated remotely. No form of authentication is required for a successful exploitation. There are known technical details, but no exploit is available.

The vulnerability scanner Nessus provides a plugin with the ID 95602 (GLSA-201612-16 : OpenSSL: Multiple vulnerabilities), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Gentoo Local Security Checks. 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 1.1.0a eliminates this vulnerability.

The vulnerability is also documented in the databases at Tenable (95602) and SecurityFocus (BID 93149†). Similar entries are available at VDB-87879, VDB-88080, VDB-90396 and VDB-90937. VulDB is the best source for vulnerability data and more expert information about this specific topic.

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: 6.4
VulDB Meta Temp Score: 6.3

VulDB Base Score: 5.3
VulDB Temp Score: 5.1
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
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: 95602
Nessus Name: GLSA-201612-16 : OpenSSL: Multiple vulnerabilities
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍

OpenVAS ID: 703391
OpenVAS Name: ScreenOS OpenSSL Security Updates
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: OpenSSL 1.1.0a
Patch: 63658103d4441924f8dbfc517b99bb54758a98b9

Timelineinfo

07/26/2016 🔍
09/26/2016 +62 days 🔍
09/26/2016 +0 days 🔍
09/27/2016 +1 days 🔍
09/21/2022 +2185 days 🔍

Sourcesinfo

Product: openssl.org

Advisory: 1563
Status: Confirmed

CVE: CVE-2016-6305 (🔍)
GCVE (CVE): GCVE-0-2016-6305
GCVE (VulDB): GCVE-100-92200

OVAL: 🔍

SecurityFocus: 93149
SecurityTracker: 1036879

See also: 🔍

Entryinfo

Created: 09/27/2016 10:49
Updated: 09/21/2022 13:40
Changes: 09/27/2016 10:49 (42), 06/08/2017 23:47 (21), 09/21/2022 13:28 (7), 09/21/2022 13:34 (11), 09/21/2022 13:40 (1)
Complete: 🔍
Cache ID: 216:73C:103

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