Apple macOS up to 10.12.1 OpenSSL resource management

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

Summaryinfo

A vulnerability was found in Apple macOS up to 10.12.1. It has been declared as problematic. The affected element is an unknown function of the component OpenSSL. Executing a manipulation can lead to resource management. This vulnerability appears as CVE-2016-6304. The attack may be performed from remote. There is no available exploit. It is recommended to upgrade the affected component.

Detailsinfo

A vulnerability was found in Apple macOS up to 10.12.1 (Operating System). It has been declared as problematic. This vulnerability affects some unknown processing of the component OpenSSL. The manipulation with an unknown input leads to a resource management vulnerability. The CWE definition for the vulnerability is CWE-399. As an impact it is known to affect availability. CVE summarizes:

Multiple memory leaks in t1_lib.c in OpenSSL before 1.0.1u, 1.0.2 before 1.0.2i, and 1.1.0 before 1.1.0a allow remote attackers to cause a denial of service (memory consumption) via large OCSP Status Request extensions.

The bug was discovered 09/22/2016. The weakness was presented 12/13/2016 by Shi Lei with Qihoo 360 as HT207423 as confirmed advisory (Website). The advisory is shared for download at support.apple.com. This vulnerability was named CVE-2016-6304 since 07/26/2016. The exploitation appears to be easy. The attack can be initiated remotely. No form of authentication is required for a successful exploitation. There are neither technical details nor an exploit publicly available. The advisory points out:

A denial of service issue in unbounded OCSP growth was addressed through improved memory handling.

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 94756 (openSUSE Security Update : mysql-community-server (openSUSE-2016-1289)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family SuSE 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 10.12.2 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 (94756) and SecurityFocus (BID 93150†). See VDB-87879, VDB-88080, VDB-90132 and VDB-90116 for similar entries. VulDB is the best source for vulnerability data and more expert information about this specific topic.

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CPE 2.3info

CPE 2.2info

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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: 🔍
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NVD Base Score: 🔍

Exploitinginfo

Class: Resource management
CWE: CWE-399 / CWE-404
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: 94756
Nessus Name: openSUSE Security Update : mysql-community-server (openSUSE-2016-1289)
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: macOS 10.12.2
Patch: 2c0d295e26306e15a92eb23a84a1802005c1c137

Timelineinfo

07/26/2016 🔍
09/22/2016 +58 days 🔍
09/23/2016 +1 days 🔍
09/26/2016 +3 days 🔍
11/14/2016 +49 days 🔍
12/13/2016 +29 days 🔍
12/13/2016 +0 days 🔍
12/14/2016 +1 days 🔍
10/08/2022 +2124 days 🔍

Sourcesinfo

Vendor: apple.com

Advisory: HT207423
Researcher: Shi Lei
Organization: Qihoo 360
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2016-6304 (🔍)
GCVE (CVE): GCVE-0-2016-6304
GCVE (VulDB): GCVE-100-94408

OVAL: 🔍

SecurityFocus: 93150 - OpenSSL CVE-2016-6304 Denial of Service Vulnerability
SecurityTracker: 1036878

scip Labs: https://www.scip.ch/en/?labs.20180712
See also: 🔍

Entryinfo

Created: 12/14/2016 13:38
Updated: 10/08/2022 08:25
Changes: 12/14/2016 13:38 (76), 07/17/2019 20:17 (13), 10/08/2022 08:25 (5)
Complete: 🔍
Cache ID: 216:885:103

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