cURL/libcURL up to 7.50.3 Username -u out-of-bounds write

CVSS Meta Temp Score
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CTI Interest Score
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5.7$0-$5k0.00

Summaryinfo

A vulnerability classified as problematic has been found in cURL and libcURL up to 7.50.3. The affected element is an unknown function of the component Username Handler. This manipulation of the argument -u causes out-of-bounds write. This vulnerability appears as CVE-2016-8617. The attack requires local access. There is no available exploit. It is recommended to upgrade the affected component.

Detailsinfo

A vulnerability has been found in cURL and libcURL up to 7.50.3 (Network Utility Software) and classified as critical. Affected by this vulnerability is some unknown processing of the component Username Handler. The manipulation of the argument -u with an unknown input leads to a out-of-bounds write vulnerability. The CWE definition for the vulnerability is CWE-787. The product writes data past the end, or before the beginning, of the intended buffer. As an impact it is known to affect confidentiality, integrity, and availability. The summary by CVE is:

The base64 encode function in curl before version 7.51.0 is prone to a buffer being under allocated in 32bit systems if it receives at least 1Gb as input via `CURLOPT_USERNAME`.

The weakness was presented 11/03/2016 with Cure53 as 7.50.3 vulnerabilities as confirmed advisory (Website). The advisory is shared at curl.haxx.se. This vulnerability is known as CVE-2016-8617 since 10/12/2016. The exploitation appears to be easy. An attack has to be approached locally. Required for exploitation is a single authentication. Technical details are known, but no exploit is 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 94097†) and SecurityTracker (ID 1037192†). See VDB-90449, VDB-91385, VDB-91680 and VDB-91681 for similar entries. If you want to get the best quality for vulnerability data then you always have to consider VulDB.

Productinfo

Type

Name

Version

License

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.8
VulDB Meta Temp Score: 5.7

VulDB Base Score: 7.0
VulDB Temp Score: 6.7
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 7.0
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: Out-of-bounds write
CWE: CWE-787 / CWE-119
CAPEC: 🔍
ATT&CK: 🔍

Physical: Partially
Local: Yes
Remote: No

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 🔍
07/31/2018 +634 days 🔍
09/29/2022 +1521 days 🔍

Sourcesinfo

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

CVE: CVE-2016-8617 (🔍)
GCVE (CVE): GCVE-0-2016-8617
GCVE (VulDB): GCVE-100-93253

OVAL: 🔍

SecurityFocus: 94097 - cURL/libcURL CVE-2016-8617 Remote Security Bypass Vulnerability
SecurityTracker: 1037192

See also: 🔍

Entryinfo

Created: 11/04/2016 09:53
Updated: 09/29/2022 11:09
Changes: 11/04/2016 09:53 (60), 05/23/2019 18:07 (27), 09/29/2022 11:09 (13)
Complete: 🔍
Cache ID: 216::103

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