Apple macOS up to 10.12.3 Apache 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 classified as problematic was found in Apple macOS up to 10.12.3. This impacts an unknown function of the component Apache. Executing a manipulation can lead to input validation. This vulnerability is tracked as CVE-2016-2161. The attack can be launched remotely. No exploit exists. Upgrading the affected component is advised.

Detailsinfo

A vulnerability was found in Apple macOS up to 10.12.3 (Operating System). It has been declared as problematic. This vulnerability affects an unknown function of the component Apache. 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:

In Apache HTTP Server versions 2.4.0 to 2.4.23, malicious input to mod_auth_digest can cause the server to crash, and each instance continues to crash even for subsequently valid requests.

The bug was discovered 12/20/2016. The weakness was disclosed 03/27/2017 by Maksim Malyutin as HT207615 as confirmed advisory (Website). The advisory is available at support.apple.com. This vulnerability was named CVE-2016-2161 since 01/29/2016. The exploitation appears to be easy. The attack can be initiated remotely. No form of authentication is required for a successful exploitation. The technical details are unknown and an exploit is not available. The advisory points out:

Multiple issues existed in Apache before 2.4.25. These were addressed by updating LibreSSL to version 2.4.25.

The vulnerability was handled as a non-public zero-day exploit for at least 31 days. During that time the estimated underground price was around $5k-$25k. The vulnerability scanner Nessus provides a plugin with the ID 96631 (Amazon Linux AMI : httpd24 (ALAS-2017-785)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Amazon Linux Local Security Checks and running in the context l. The commercial vulnerability scanner Qualys is able to test this issue with plugin 370348 (Apple Mac OS X Security Update Sierra 10.12.4, El Capitan 2017-001 and Yosemite 2017-001 Not Installed (APPLE-SA-2017-03-27-3)).

Upgrading to version 10.12.4 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 (96631) and SecurityFocus (BID 95076†). The entries VDB-89669, VDB-89849, VDB-93958 and VDB-94625 are pretty similar. If you want to get best quality of vulnerability data, you may have to visit VulDB.

Productinfo

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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: 🔍
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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: 96631
Nessus Name: Amazon Linux AMI : httpd24 (ALAS-2017-785)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

OpenVAS ID: 703796
OpenVAS Name: Debian Security Advisory DSA 3796-1 (apache2 - security update)
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 10.12.4

Timelineinfo

01/29/2016 🔍
12/20/2016 +326 days 🔍
12/20/2016 +0 days 🔍
01/20/2017 +31 days 🔍
03/27/2017 +66 days 🔍
03/27/2017 +0 days 🔍
03/28/2017 +1 days 🔍
07/27/2017 +121 days 🔍
11/15/2022 +1937 days 🔍

Sourcesinfo

Vendor: apple.com

Advisory: HT207615
Researcher: Maksim Malyutin
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2016-2161 (🔍)
GCVE (CVE): GCVE-0-2016-2161
GCVE (VulDB): GCVE-100-98602

OVAL: 🔍

SecurityFocus: 95076 - Apache HTTP Server CVE-2016-2161 Denial of Service Vulnerability
OSVDB: - CVE-2016-2161 - Apache HTTP - Denial of Service Issue
SecurityTracker: 1037508

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

Entryinfo

Created: 03/28/2017 11:01
Updated: 11/15/2022 15:23
Changes: 03/28/2017 11:01 (81), 08/20/2020 16:18 (7), 11/15/2022 15:23 (4)
Complete: 🔍
Cache ID: 216:68E:103

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