ARM mbed TLS up to 1.3.21/2.1.9/2.6.x RSASSA-PSS Signature Verification Crafted Certificate memory corruption

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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A vulnerability was found in ARM mbed TLS up to 1.3.21/2.1.9/2.6.x. It has been rated as critical. Affected by this issue is some unknown functionality of the component RSASSA-PSS Signature Verification. The manipulation as part of a Crafted Certificate leads to a memory corruption vulnerability. Using CWE to declare the problem leads to 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. Impacted is confidentiality, integrity, and availability.

The bug was discovered 02/05/2018. The weakness was disclosed 02/13/2018 (Website). The advisory is shared for download at This vulnerability is handled as CVE-2018-0487 since 11/27/2017. The attack may be launched remotely. No form of authentication is required for exploitation. There are neither technical details nor an exploit publicly available.

The vulnerability was handled as a non-public zero-day exploit for at least 8 days. During that time the estimated underground price was around $0-$5k. The vulnerability scanner Nessus provides a plugin with the ID 106918 (openSUSE Security Update : mbedtls (openSUSE-2018-186)), 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 170877 (OpenSUSE Security Update for mbedtls (openSUSE-SU-2018:0491-1)).

Upgrading to version 1.3.22, 2.1.10 or 2.7.0 eliminates this vulnerability. A possible mitigation has been published 1 weeks after the disclosure of the vulnerability.

The vulnerability is also documented in the vulnerability database at Tenable (106918). The entries 113193 and 113268 are pretty similar.





CPE 2.3info

CPE 2.2info


VulDB Meta Base Score: 8.5
VulDB Meta Temp Score: 8.4

VulDB Base Score: 7.3
VulDB Temp Score: 7.0
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 9.8
NVD Vector: 🔍



VulDB Base Score: 🔍
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NVD Base Score: 🔍


Class: Memory corruption
CWE: CWE-119
ATT&CK: Unknown

Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍


Nessus ID: 106918
Nessus Name: openSUSE Security Update : mbedtls (openSUSE-2018-186)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

OpenVAS ID: 65722
OpenVAS Name: Debian Security Advisory DSA 4147-1 (polarssl - security update)
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍


Recommended: Upgrade
Status: 🔍

Reaction Time: 🔍
0-Day Time: 🔍
Exposure Time: 🔍

Upgrade: ARM mbed TLS 1.3.22/2.1.10/2.7.0


11/27/2017 🔍
02/01/2018 +66 days 🔍
02/05/2018 +4 days 🔍
02/13/2018 +8 days 🔍
02/13/2018 +0 days 🔍
02/13/2018 +0 days 🔍
02/20/2018 +7 days 🔍
02/21/2018 +1 days 🔍
02/06/2023 +1811 days 🔍


Advisory: USN-4267-1
Status: Not defined
Confirmation: 🔍

CVE: CVE-2018-0487 (🔍)

SecurityFocus: 103056 - ARM mbed TLS CVE-2018-0487 Remote Code Execution Vulnerability

See also: 🔍


Created: 02/13/2018 08:33 PM
Updated: 02/06/2023 02:19 PM
Changes: 02/13/2018 08:33 PM (77), 01/04/2020 11:46 AM (5), 02/06/2023 02:19 PM (4)
Complete: 🔍


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