PolarSSL/ARM mbed TLS Hostname memory corruption

CVSS Meta Temp Score
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CTI Interest Score
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A vulnerability was found in PolarSSL and ARM mbed TLS (affected version not known). It has been classified as critical. Affected is some unknown functionality of the component Hostname Handler. The manipulation with an unknown input leads to a memory corruption vulnerability. CWE is classifying the issue as CWE-119. The product performs operations on a memory buffer, but it can read from or write to a memory location that is outside of the intended boundary of the buffer. This is going to have an impact on confidentiality, integrity, and availability. CVE summarizes:

Heap-based buffer overflow in PolarSSL 1.x before 1.2.17 and ARM mbed TLS (formerly PolarSSL) 1.3.x before 1.3.14 and 2.x before 2.1.2 allows remote SSL servers to cause a denial of service (client crash) and possibly execute arbitrary code via a long hostname to the server name indication (SNI) extension, which is not properly handled when creating a ClientHello message. NOTE: this identifier has been SPLIT per ADT3 due to different affected version ranges. See CVE-2015-8036 for the session ticket issue that was introduced in 1.3.0.

The weakness was published 11/02/2015 (Website). The advisory is available at tls.mbed.org. This vulnerability is traded as CVE-2015-5291 since 07/01/2015. It is possible to launch the attack remotely. The exploitation doesn't require any form of authentication. The technical details are unknown and an exploit is not available.

The vulnerability scanner Nessus provides a plugin with the ID 86386 (FreeBSD : mbedTLS/PolarSSL -- DoS and possible remote code execution (07a1a76c-734b-11e5-ae81-14dae9d210b8)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family FreeBSD Local Security Checks and running in the context l. The commercial vulnerability scanner Qualys is able to test this issue with plugin 175621 (Debian Security Update for polarssl (DSA 3468-1)).

Upgrading eliminates this vulnerability. A possible mitigation has been published even before and not after the disclosure of the vulnerability.

The vulnerability is also documented in the vulnerability database at Tenable (86386). Similar entry is available at VDB-78995.



CPE 2.3info

CPE 2.2info


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VulDB Meta Base Score: 7.3
VulDB Meta Temp Score: 7.0

VulDB Base Score: 7.3
VulDB Temp Score: 7.0
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Class: Memory corruption
CWE: CWE-119

Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

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Nessus ID: 86386
Nessus Name: FreeBSD : mbedTLS/PolarSSL -- DoS and possible remote code execution (07a1a76c-734b-11e5-ae81-14dae9d210b8)
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OpenVAS ID: 867773
OpenVAS Name: Fedora Update for mbedtls FEDORA-2015-7
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Threat Intelligenceinfo

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Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍


07/01/2015 🔍
10/15/2015 +106 days 🔍
10/15/2015 +0 days 🔍
10/15/2015 +0 days 🔍
11/02/2015 +18 days 🔍
11/02/2015 +0 days 🔍
11/03/2015 +1 days 🔍
11/03/2015 +0 days 🔍
06/26/2022 +2427 days 🔍


Advisory: FEDORA-2015-30a417bea9
Status: Not defined
Confirmation: 🔍

CVE: CVE-2015-5291 (🔍)
Vulnerability Center: 54119 - PolarSSL <1.2.17, <1.3.14, <2.1.2 Remote DoS and Code Execution Using Session Tickets or SNI, Medium

See also: 🔍


Created: 11/03/2015 09:21 AM
Updated: 06/26/2022 07:22 AM
Changes: 11/03/2015 09:21 AM (54), 03/10/2018 10:54 AM (13), 06/26/2022 07:22 AM (3)
Complete: 🔍
Cache ID: 44:587:40


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