Apple macOS up to 10.11 curl improper authentication

CVSS Meta Temp Score
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CTI Interest Score
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7.1$0-$5k0.00

Summaryinfo

A vulnerability categorized as critical has been discovered in Apple macOS up to 10.11. This affects an unknown part of the component curl. Such manipulation leads to improper authentication. This vulnerability is uniquely identified as CVE-2016-0755. The attack can be launched remotely. No exploit exists. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability, which was classified as critical, has been found in Apple macOS up to 10.11 (Operating System). Affected by this issue is an unknown functionality of the component curl. The manipulation with an unknown input leads to a improper authentication vulnerability. Using CWE to declare the problem leads to CWE-287. When an actor claims to have a given identity, the product does not prove or insufficiently proves that the claim is correct. Impacted is confidentiality, integrity, and availability. CVE summarizes:

The ConnectionExists function in lib/url.c in libcurl before 7.47.0 does not properly re-use NTLM-authenticated proxy connections, which might allow remote attackers to authenticate as other users via a request, a similar issue to CVE-2014-0015.

The weakness was disclosed 09/20/2016 as HT207170 as confirmed advisory (Website). The advisory is shared for download at support.apple.com. This vulnerability is handled as CVE-2016-0755 since 12/16/2015. The exploitation is known to be easy. The attack may be launched remotely. No form of authentication is required for exploitation. There are neither technical details nor an exploit publicly available. The advisory points out:

Multiple security issues existed in curl prior to version 7.49.1. These issues were addressed by updating curl to version 7.49.1.

The vulnerability scanner Nessus provides a plugin with the ID 89548 (Fedora 23 : curl-7.43.0-5.fc23 (2016-57bebab3b6)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Fedora Local Security Checks and running in the context l. The commercial vulnerability scanner Qualys is able to test this issue with plugin 43619 (Juniper Junos OS Multiple vulnerabilities in cURL versions (JSA10874)).

Upgrading to version 10.12 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 (89548) and SecurityFocus (BID 82307†). The entries VDB-8439, VDB-9262, VDB-10906 and VDB-11245 are pretty similar. VulDB is the best source for vulnerability data and more expert information about this specific topic.

Productinfo

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Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 7.3
VulDB Meta Temp Score: 7.1

VulDB Base Score: 7.3
VulDB Temp Score: 7.0
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 7.3
NVD Vector: 🔍

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Class: Improper authentication
CWE: CWE-287
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: 89548
Nessus Name: Fedora 23 : curl-7.43.0-5.fc23 (2016-57bebab3b6)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

OpenVAS ID: 14611
OpenVAS Name: Amazon Linux Local Check: alas-2016-652
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

Reaction Time: 🔍
Exposure Time: 🔍

Upgrade: macOS 10.12

Timelineinfo

12/16/2015 🔍
01/27/2016 +42 days 🔍
01/28/2016 +1 days 🔍
03/04/2016 +35 days 🔍
09/20/2016 +200 days 🔍
09/20/2016 +0 days 🔍
09/26/2016 +6 days 🔍
09/20/2022 +2185 days 🔍

Sourcesinfo

Vendor: apple.com

Advisory: HT207170
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2016-0755 (🔍)
GCVE (CVE): GCVE-0-2016-0755
GCVE (VulDB): GCVE-100-92072
SecurityFocus: 82307 - cURL/libcURL NTLM Connection CVE-2016-0755 Remote Security Bypass Vulnerability
SecurityTracker: 1034882

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

Entryinfo

Created: 09/26/2016 11:47
Updated: 09/20/2022 19:34
Changes: 09/26/2016 11:47 (72), 04/25/2019 17:55 (12), 09/20/2022 19:34 (3)
Complete: 🔍
Cache ID: 216::103

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