haxx.se cURL/libcURL up to 7.35.0 Session improper authentication

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

Summaryinfo

A vulnerability has been found in haxx.se cURL and libcURL up to 7.35.0 and classified as problematic. This affects an unknown part of the component Session Handler. Performing a manipulation results in improper authentication. This vulnerability is cataloged as CVE-2014-0138. There is no exploit available. The affected component should be upgraded.

Detailsinfo

A vulnerability, which was classified as problematic, was found in haxx.se cURL and libcURL up to 7.35.0 (Network Utility Software). This affects an unknown part of the component Session Handler. The manipulation with an unknown input leads to a improper authentication vulnerability. CWE is classifying the issue as CWE-287. When an actor claims to have a given identity, the product does not prove or insufficiently proves that the claim is correct. This is going to have an impact on integrity, and availability. The summary by CVE is:

The default configuration in cURL and libcurl 7.10.6 before 7.36.0 re-uses (1) SCP, (2) SFTP, (3) POP3, (4) POP3S, (5) IMAP, (6) IMAPS, (7) SMTP, (8) SMTPS, (9) LDAP, and (10) LDAPS connections, which might allow context-dependent attackers to connect as other users via a request, a similar issue to CVE-2014-0015.

The weakness was shared 03/26/2014 by Steve Holme as adv_20140326A as confirmed advisory (Website). The advisory is shared at curl.haxx.se. The vendor cooperated in the coordination of the public release. This vulnerability is uniquely identified as CVE-2014-0138 since 12/03/2013. The exploitability is told to be easy. 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 was handled as a non-public zero-day exploit for at least 39 days. During that time the estimated underground price was around $0-$5k. The vulnerability scanner Nessus provides a plugin with the ID 75339 (openSUSE Security Update : curl (openSUSE-SU-2014:0598-1)), 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 43619 (Juniper Junos OS Multiple vulnerabilities in cURL versions (JSA10874)).

Upgrading to version 7.36.0 eliminates this vulnerability. Applying the patch libcurl-bad-reuse.patch is able to eliminate this problem. The bugfix is ready for download at curl.haxx.se. The best possible mitigation is suggested to be upgrading to the latest version. A possible mitigation has been published immediately after the disclosure of the vulnerability. The advisory contains the following remark:

Applications can disable libcurl's re-use of connections and thus mitigate this problem, by using one of [the following] libcurl options to alter how connections are or aren't re-used.

The vulnerability is also documented in the databases at X-Force (92131), Tenable (75339), SecurityFocus (BID 66457†), Secunia (SA57434†) and Vulnerability Center (SBV-56916†). The entries VDB-8439, VDB-9262, VDB-10906 and VDB-11245 are related to this item. Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.5
VulDB Meta Temp Score: 5.7

VulDB Base Score: 6.5
VulDB Temp Score: 5.7
VulDB Vector: 🔍
VulDB Reliability: 🔍

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: Unproven

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 75339
Nessus Name: openSUSE Security Update : curl (openSUSE-SU-2014:0598-1)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍
Nessus Port: 🔍

OpenVAS ID: 867657
OpenVAS Name: Fedora Update for curl FEDORA-2014-4436
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 7.36.0
Patch: libcurl-bad-reuse.patch

Timelineinfo

12/03/2013 🔍
02/15/2014 +74 days 🔍
03/25/2014 +38 days 🔍
03/25/2014 +0 days 🔍
03/26/2014 +0 days 🔍
03/26/2014 +0 days 🔍
03/26/2014 +0 days 🔍
04/01/2014 +6 days 🔍
04/15/2014 +14 days 🔍
06/13/2014 +58 days 🔍
03/01/2016 +628 days 🔍
05/10/2026 +3721 days 🔍

Sourcesinfo

Advisory: adv_20140326A
Researcher: Steve Holme
Status: Confirmed
Confirmation: 🔍
Coordinated: 🔍

CVE: CVE-2014-0138 (🔍)
GCVE (CVE): GCVE-0-2014-0138
GCVE (VulDB): GCVE-100-12729

OVAL: 🔍

X-Force: 92131 - cURL/libcURL used connections security bypass, Medium Risk
SecurityFocus: 66457 - cURL/libcURL CVE-2014-0138 Remote Security Bypass Vulnerability
Secunia: 57434 - libcURL Connection Re-use and Certificate Verification Security Issues, Not Critical
Vulnerability Center: 56916 - libcurl Security Bypass Vulnerability due to an Error in cURL Default Configuration, Medium

See also: 🔍

Entryinfo

Created: 04/01/2014 11:07
Updated: 05/10/2026 16:23
Changes: 04/01/2014 11:07 (89), 08/25/2018 09:24 (7), 05/10/2026 16:23 (17)
Complete: 🔍
Cache ID: 216::103

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

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