ARM mbed TLS up to 2.1.10/2.7.1 ssl_parse_server_psk_hint memory corruption

Summaryinfo

A vulnerability labeled as critical has been found in ARM mbed TLS up to 2.1.10/2.7.1. This affects the function ssl_parse_server_psk_hint. The manipulation results in memory corruption. This vulnerability is identified as CVE-2018-9989. The attack can be executed remotely. There is not any exploit available. The affected component should be upgraded.

Detailsinfo

A vulnerability, which was classified as critical, was found in ARM mbed TLS up to 2.1.10/2.7.1. Affected is the function ssl_parse_server_psk_hint. 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:

ARM mbed TLS before 2.1.11, before 2.7.2, and before 2.8.0 has a buffer over-read in ssl_parse_server_psk_hint() that could cause a crash on invalid input.

The bug was discovered 03/22/2018. The weakness was released 04/10/2018 (GitHub Repository). The advisory is available at github.com. This vulnerability is traded as CVE-2018-9989 since 04/10/2018. The exploitability is told to be easy. It is possible to launch the attack remotely. The exploitation doesn't require any form of authentication. Technical details are known, but there is no available exploit.

The vulnerability was handled as a non-public zero-day exploit for at least 19 days. During that time the estimated underground price was around $0-$5k. The vulnerability scanner Nessus provides a plugin with the ID 109237 (openSUSE Security Update : mbedtls (openSUSE-2018-382)), 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 171095 (OpenSUSE Security Update for mbedtls (openSUSE-SU-2018:1039-1)).

Upgrading to version 2.1.11, 2.7.2 or 2.8.0 eliminates this vulnerability. A possible mitigation has been published 2 weeks after the disclosure of the vulnerability.

The vulnerability is also documented in the vulnerability database at Tenable (109237). Entry connected to this vulnerability is available at VDB-115985. If you want to get best quality of vulnerability data, you may have to visit VulDB.

Productinfo

Name

• ARM mbed TLS

Version

• 2.1.0
• 2.1.1
• 2.1.2
• 2.1.3
• 2.1.4
• 2.1.5
• 2.1.6
• 2.1.7
• 2.1.8
• 2.1.9
• 2.1.10
• 2.7.0
• 2.7.1

License

• commercial

CPE 2.3info

• 🔍
• 🔍
• 🔍

CPE 2.2info

• 🔍
• 🔍
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Entryinfo

If you want to get best quality of vulnerability data, you may have to visit VulDB.

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