haxx.se cURL/libcURL up to 7.35.0 on Windows Schannel SSL Backend input validation

CVSS Meta Temp Score
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CTI Interest Score
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4.6$0-$5k0.00

Summaryinfo

A vulnerability identified as problematic has been detected in haxx.se cURL and libcURL up to 7.35.0 on Windows. Affected is an unknown function of the component Schannel SSL Backend. Performing a manipulation results in input validation. This vulnerability was named CVE-2014-2522. There is no available exploit. You should upgrade the affected component.

Detailsinfo

A vulnerability, which was classified as problematic, was found in haxx.se cURL and libcURL up to 7.35.0 on Windows (Network Utility Software). This affects some unknown functionality of the component Schannel SSL Backend. The manipulation with an unknown input leads to a input validation vulnerability. CWE is classifying the issue as 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. This is going to have an impact on integrity. The summary by CVE is:

curl and libcurl 7.27.0 through 7.35.0, when running on Windows and using the SChannel/Winssl TLS backend, does not verify that the server hostname matches a domain name in the subject's Common Name (CN) or subjectAltName field of the X.509 certificate when accessing a URL that uses a numerical IP address, which allows man-in-the-middle attackers to spoof servers via an arbitrary valid certificate.

The weakness was presented 03/17/2014 by Daniel Stenberg as flaw in curl's Windows SSL backend as not defined mailinglist post (oss-sec). The advisory is shared at seclists.org. The public release was coordinated in cooperation with haxx.se. This vulnerability is uniquely identified as CVE-2014-2522 since 03/17/2014. It is possible to initiate the attack remotely. No form of authentication is needed for exploitation. Neither technical details nor an exploit are publicly available.

The vulnerability scanner Nessus provides a plugin with the ID 73247 (Slackware 13.0 / 13.1 / 13.37 / 14.0 / 14.1 / current : curl (SSA:2014-086-01)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Slackware Local Security Checks and running in the context l. The commercial vulnerability scanner Qualys is able to test this issue with plugin 86343 (HP System Management Homepage Multiple Vulnerabilities (HPSBMU03422)).

Upgrading to version 7.36.0 eliminates this vulnerability. The upgrade is hosted for download at curl.haxx.se. A possible mitigation has been published 2 weeks after the disclosure of the vulnerability.

The vulnerability is also documented in the databases at X-Force (92040), Tenable (73247), SecurityFocus (BID 66296†), Secunia (SA57836†) and Vulnerability Center (SBV-56919†). See VDB-67663, VDB-66813 and VDB-65652 for similar entries. If you want to get the best quality for vulnerability data then you always have to consider VulDB.

Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.3
VulDB Meta Temp Score: 4.6

VulDB Base Score: 5.3
VulDB Temp Score: 4.6
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Class: Input validation
CWE: CWE-20
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Unproven

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 73247
Nessus Name: Slackware 13.0 / 13.1 / 13.37 / 14.0 / 14.1 / current : curl (SSA:2014-086-01)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

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 7.36.0

Timelineinfo

03/17/2014 🔍
03/17/2014 +0 days 🔍
03/19/2014 +2 days 🔍
03/26/2014 +7 days 🔍
03/27/2014 +1 days 🔍
03/31/2014 +3 days 🔍
04/15/2014 +15 days 🔍
04/18/2014 +3 days 🔍
09/23/2015 +522 days 🔍
03/01/2016 +161 days 🔍
05/11/2026 +3722 days 🔍

Sourcesinfo

Advisory: flaw in curl's Windows SSL backend
Researcher: Daniel Stenberg
Status: Confirmed
Confirmation: 🔍
Coordinated: 🔍

CVE: CVE-2014-2522 (🔍)
GCVE (CVE): GCVE-0-2014-2522
GCVE (VulDB): GCVE-100-12693
X-Force: 92040 - cURL/libcURL SSL certificates security bypass, Medium Risk
SecurityFocus: 66296 - cURL/libcURL CVE-2014-2522 SSL Certificate Validation Security Bypass Vulnerability
Secunia: 57836 - Chef Multiple Vulnerabilities, Moderately Critical
Vulnerability Center: 56919 - cURL and libcurl on Windows Remote Man-in-the-Middle and Spoofing Using SChannel/Winssl TLS, Medium

See also: 🔍

Entryinfo

Created: 03/27/2014 09:10
Updated: 05/11/2026 10:04
Changes: 03/27/2014 09:10 (82), 08/25/2018 09:25 (7), 05/11/2026 10:04 (22)
Complete: 🔍
Cache ID: 216::103

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