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8.4	$0-$5k	0.00

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. CVE summarizes:

ARM mbed TLS before 1.3.22, before 2.1.10, and before 2.7.0 allows remote attackers to execute arbitrary code or cause a denial of service (buffer overflow) via a crafted certificate chain that is mishandled during RSASSA-PSS signature verification within a TLS or DTLS session.

The bug was discovered 02/05/2018. The weakness was disclosed 02/13/2018 (Website). The advisory is shared for download at tls.mbed.org. 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 databases at Tenable (106918) and SecurityFocus (BID 103056†).

Productinfo

Name

• ARM mbed TLS

Version

• 1.3.0
• 1.3.1
• 1.3.2
• 1.3.3
• 1.3.4
• 1.3.5
• 1.3.6
• 1.3.7
• 1.3.8
• 1.3.9
• 1.3.10
• 1.3.11
• 1.3.12
• 1.3.13
• 1.3.14
• 1.3.15
• 1.3.16
• 1.3.17
• 1.3.18
• 1.3.19
• 1.3.20
• 1.3.21
• 2.0
• 2.1
• 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
• 2.2
• 2.3
• 2.4
• 2.5
• 2.6

License

• commercial

CPE 2.3info

• 🔍
• 🔍
• 🔍

CPE 2.2info

• 🔍
• 🔍
• 🔍

CVSSv4info

VulDB CVSS-B Score: 🔍
VulDB CVSS-BT Score: 🔍
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

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: 🔍

CVSSv2info

AV	AC	Au	C	I	A
💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳

Vector	Complexity	Authentication	Confidentiality	Integrity	Availability
unlock	unlock	unlock	unlock	unlock	unlock
unlock	unlock	unlock	unlock	unlock	unlock
unlock	unlock	unlock	unlock	unlock	unlock

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

NVD Base Score: 🔍

Exploitinginfo

Class: Memory corruption
CWE: CWE-119
CAPEC: 🔍
ATT&CK: 🔍

Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

0-Day	unlock	unlock	unlock	unlock
Today	unlock	unlock	unlock	unlock

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: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

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

Upgrade: ARM mbed TLS 1.3.22/2.1.10/2.7.0

Timelineinfo

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 🔍

Sourcesinfo

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

CVE: CVE-2018-0487 (🔍)
OVAL: 🔍

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

Entryinfo

Created: 02/13/2018 20:33
Updated: 02/06/2023 14:19
Changes: 02/13/2018 20:33 (77), 01/04/2020 11:46 (5), 02/06/2023 14:19 (4)
Complete: 🔍
Cache ID: 18:2EB:103

Discussion

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