Apple macOS up to 10.12.1 curl double free

CVSS Meta Temp Score
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CTI Interest Score
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8.2$0-$5k0.00

Summaryinfo

A vulnerability marked as critical has been reported in Apple macOS up to 10.12.1. This affects an unknown part of the component curl. Performing a manipulation results in double free. This vulnerability is identified as CVE-2016-8618. 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 Apple macOS up to 10.12.1 (Operating System). It has been classified as very critical. This affects an unknown code of the component curl. The manipulation with an unknown input leads to a double free vulnerability. CWE is classifying the issue as CWE-415. The product calls free() twice on the same memory address, potentially leading to modification of unexpected memory locations. This is going to have an impact on confidentiality, integrity, and availability. The summary by CVE is:

The libcurl API function called `curl_maprintf()` before version 7.51.0 can be tricked into doing a double-free due to an unsafe `size_t` multiplication, on systems using 32 bit `size_t` variables.

The bug was discovered 09/14/2016. The weakness was released 12/13/2016 with Cure53 as HT207423 as confirmed advisory (Website). It is possible to read the advisory at support.apple.com. This vulnerability is uniquely identified as CVE-2016-8618 since 10/12/2016. The exploitability is told to be easy. It is possible to initiate the attack remotely. No form of authentication is needed for exploitation. The technical details are unknown and an exploit is not publicly available. The pricing for an exploit might be around USD $0-$5k at the moment (estimation calculated on 10/07/2022). It is expected to see the exploit prices for this product increasing in the near future. The advisory points out:

Multiple issues existed in curl. These issues were addressed by updating to curl version 7.51.0.

The vulnerability was handled as a non-public zero-day exploit for at least 51 days. During that time the estimated underground price was around $25k-$100k. The vulnerability scanner Nessus provides a plugin with the ID 94572 (SUSE SLES11 Security Update : curl (SUSE-SU-2016:2714-1)), 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 157987 (Oracle Enterprise Linux Security Update for curl (ELSA-2019-4652)).

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 (94572) and SecurityFocus (BID 94098†). Entries connected to this vulnerability are available at VDB-90449, VDB-91385, VDB-91680 and VDB-91681. Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 8.3
VulDB Meta Temp Score: 8.2

VulDB Base Score: 9.8
VulDB Temp Score: 9.4
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 9.8
NVD Vector: 🔍

CNA Base Score: 5.3
CNA Vector (Red Hat, Inc.): 🔍

CVSSv2info

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

NVD Base Score: 🔍

Exploitinginfo

Class: Double free
CWE: CWE-415 / CWE-119
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: 94572
Nessus Name: SUSE SLES11 Security Update : curl (SUSE-SU-2016:2714-1)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

OpenVAS ID: 801105
OpenVAS Name: Apple Mac OS X Multiple Vulnerabilities-01 February-2017
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

Timelineinfo

09/14/2016 🔍
10/12/2016 +28 days 🔍
11/02/2016 +21 days 🔍
11/04/2016 +2 days 🔍
12/13/2016 +39 days 🔍
12/13/2016 +0 days 🔍
12/16/2016 +3 days 🔍
07/31/2018 +591 days 🔍
10/07/2022 +1529 days 🔍

Sourcesinfo

Vendor: apple.com

Advisory: HT207423
Organization: Cure53
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2016-8618 (🔍)
GCVE (CVE): GCVE-0-2016-8618
GCVE (VulDB): GCVE-100-94371

OVAL: 🔍

SecurityFocus: 94098 - cURL/libcURL CVE-2016-8618 Remote Security Bypass Vulnerability
SecurityTracker: 1037192

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

Entryinfo

Created: 12/16/2016 14:12
Updated: 10/07/2022 20:57
Changes: 12/16/2016 14:12 (73), 07/08/2019 14:46 (14), 10/07/2022 20:50 (3), 10/07/2022 20:57 (12)
Complete: 🔍
Cache ID: 216::103

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