cURL/libcURL up to 7.50.3 Cookie Sharing use after free

CVSS Meta Temp Score
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CTI Interest Score
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6.0$0-$5k0.00

Summaryinfo

A vulnerability was found in cURL and libcURL up to 7.50.3. It has been classified as problematic. Affected by this issue is some unknown functionality of the component Cookie Sharing. This manipulation causes use after free. The identification of this vulnerability is CVE-2016-8623. It is possible to initiate the attack remotely. There is no exploit available. Upgrading the affected component is recommended.

Detailsinfo

A vulnerability classified as critical was found in cURL and libcURL up to 7.50.3 (Network Utility Software). Affected by this vulnerability is an unknown code block of the component Cookie Sharing. The manipulation with an unknown input leads to a use after free vulnerability. The CWE definition for the vulnerability is CWE-416. Referencing memory after it has been freed can cause a program to crash, use unexpected values, or execute code. As an impact it is known to affect confidentiality, integrity, and availability. The summary by CVE is:

A flaw was found in curl before version 7.51.0. The way curl handles cookies permits other threads to trigger a use-after-free leading to information disclosure.

The weakness was shared 11/03/2016 with Cure53 as 7.50.3 vulnerabilities as confirmed advisory (Website). It is possible to read the advisory at curl.haxx.se. This vulnerability is known as CVE-2016-8623 since 10/12/2016. The exploitation appears to be easy. Attacking locally is a requirement. The requirement for exploitation is a single authentication. The technical details are unknown and an exploit is not publicly available.

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 7.51.0 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), SecurityFocus (BID 94106†) and SecurityTracker (ID 1037192†). The entries VDB-90449, VDB-91385, VDB-91680 and VDB-91681 are related to this item. Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

Type

Name

Version

License

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.1
VulDB Meta Temp Score: 6.0

VulDB Base Score: 7.5
VulDB Temp Score: 7.2
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 7.5
NVD Vector: 🔍

CNA Base Score: 3.3
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: Use after free
CWE: CWE-416 / CWE-119
CAPEC: 🔍
ATT&CK: 🔍

Physical: Partially
Local: Yes
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: cURL/libcURL 7.51.0

Timelineinfo

10/12/2016 🔍
11/02/2016 +21 days 🔍
11/03/2016 +1 days 🔍
11/03/2016 +0 days 🔍
11/03/2016 +0 days 🔍
11/04/2016 +1 days 🔍
11/04/2016 +0 days 🔍
08/01/2018 +635 days 🔍
09/29/2022 +1520 days 🔍

Sourcesinfo

Advisory: 7.50.3 vulnerabilities
Organization: Cure53
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2016-8623 (🔍)
GCVE (CVE): GCVE-0-2016-8623
GCVE (VulDB): GCVE-100-93259

OVAL: 🔍

SecurityFocus: 94106 - cURL/libcURL CVE-2016-8623 Information Disclosure Vulnerability
SecurityTracker: 1037192

See also: 🔍

Entryinfo

Created: 11/04/2016 09:53
Updated: 09/29/2022 12:03
Changes: 11/04/2016 09:53 (59), 05/23/2019 18:38 (27), 09/29/2022 12:03 (14)
Complete: 🔍
Cache ID: 216:0BC:103

Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

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