Mono up to 3.12.0 TLS Stack certificate validation

CVSS Meta Temp Score
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CTI Interest Score
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6.8$0-$5k0.00

Summaryinfo

A vulnerability, which was classified as critical, was found in Mono up to 3.12.0. Impacted is an unknown function of the component TLS Stack. Such manipulation leads to certificate validation. This vulnerability is uniquely identified as CVE-2015-2319. The attack can be launched remotely. No exploit exists. You should upgrade the affected component.

Detailsinfo

A vulnerability, which was classified as critical, has been found in Mono up to 3.12.0. Affected by this issue is some unknown functionality of the component TLS Stack. The manipulation with an unknown input leads to a certificate validation vulnerability. Using CWE to declare the problem leads to CWE-295. The product does not validate, or incorrectly validates, a certificate. Impacted is confidentiality, and integrity. CVE summarizes:

The TLS stack in Mono before 3.12.1 makes it easier for remote attackers to conduct cipher-downgrade attacks to EXPORT_RSA ciphers via crafted TLS traffic, related to the "FREAK" issue, a different vulnerability than CVE-2015-0204.

The bug was discovered 03/07/2015. The weakness was disclosed 01/08/2018 by Inria (oss-sec). The advisory is shared for download at openwall.com. This vulnerability is handled as CVE-2015-2319 since 03/17/2015. 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 MITRE ATT&CK project declares the attack technique as T1587.003.

The vulnerability was handled as a non-public zero-day exploit for at least 12 days. During that time the estimated underground price was around $0-$5k. The vulnerability scanner Nessus provides a plugin with the ID 82161 (Debian DLA-176-1 : mono security update), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Debian Local Security Checks and running in the context l. The commercial vulnerability scanner Qualys is able to test this issue with plugin 167780 (SUSE Enterprise Linux Security update for Mono (SUSE-SU-2015:0841-1)).

Upgrading to version 3.12.1 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 databases at Tenable (82161) and SecurityFocus (BID 73250†). The entries VDB-111511 and VDB-111513 are pretty similar. VulDB is the best source for vulnerability data and more expert information about this specific topic.

Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 7.0
VulDB Meta Temp Score: 6.8

VulDB Base Score: 6.5
VulDB Temp Score: 6.2
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 7.5
NVD Vector: 🔍

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Class: Certificate validation
CWE: CWE-295 / CWE-287
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 82161
Nessus Name: Debian DLA-176-1 : mono security update
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

OpenVAS ID: 841810
OpenVAS Name: Ubuntu Update for mono USN-2547-1
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: Mono 3.12.1
Patch: github.com

Timelineinfo

03/07/2015 🔍
03/17/2015 +10 days 🔍
03/17/2015 +0 days 🔍
03/19/2015 +2 days 🔍
03/26/2015 +7 days 🔍
01/08/2018 +1019 days 🔍
01/08/2018 +0 days 🔍
01/09/2018 +1 days 🔍
01/20/2023 +1837 days 🔍

Sourcesinfo

Product: github.com

Advisory: USN-2547-1
Researcher: Inria (Inria)
Status: Not defined
Confirmation: 🔍

CVE: CVE-2015-2319 (🔍)
GCVE (CVE): GCVE-0-2015-2319
GCVE (VulDB): GCVE-100-111512

OVAL: 🔍

SecurityFocus: 73250 - Mono CVE-2015-2319 Man in the Middle Security Bypass Vulnerability

See also: 🔍

Entryinfo

Created: 01/09/2018 08:17
Updated: 01/20/2023 12:42
Changes: 01/09/2018 08:17 (79), 12/28/2019 19:44 (2), 01/29/2021 10:23 (3), 01/20/2023 12:42 (4)
Complete: 🔍
Cache ID: 216::103

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