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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7.1$0-$5k0.00

Summaryinfo

A vulnerability, which was classified as critical, has been found in Mono up to 3.12.0. This issue affects some unknown processing of the component TLS Stack. This manipulation causes certificate validation. This vulnerability is handled as CVE-2015-2318. The attack can be initiated remotely. There is not any exploit available. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability classified as critical was found in Mono up to 3.12.0. Affected by this vulnerability is an unknown functionality of the component TLS Stack. The manipulation with an unknown input leads to a certificate validation vulnerability. The CWE definition for the vulnerability is CWE-295. The product does not validate, or incorrectly validates, a certificate. As an impact it is known to affect confidentiality, and integrity. The summary by CVE is:

The TLS stack in Mono before 3.12.1 allows man-in-the-middle attackers to conduct message skipping attacks and consequently impersonate clients by leveraging missing handshake state validation, aka a "SMACK SKIP-TLS" issue.

The bug was discovered 03/07/2015. The weakness was released 01/08/2018 by Inria (oss-sec). It is possible to read the advisory at openwall.com. This vulnerability is known as CVE-2015-2318 since 03/17/2015. The attack can be launched remotely. The exploitation doesn't need any form of authentication. The technical details are unknown and an exploit is not publicly available. The attack technique deployed by this issue is T1587.003 according to MITRE ATT&CK.

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 73253†). Entries connected to this vulnerability are available at VDB-111512 and VDB-111513. Be aware that VulDB is the high quality source for vulnerability data.

Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 7.3
VulDB Meta Temp Score: 7.1

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

NVD Base Score: 8.1
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 🔍
03/19/2015 +2 days 🔍
03/20/2015 +1 days 🔍
03/26/2015 +6 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
Status: Not defined
Confirmation: 🔍

CVE: CVE-2015-2318 (🔍)
GCVE (CVE): GCVE-0-2015-2318
GCVE (VulDB): GCVE-100-111511

OVAL: 🔍

SecurityFocus: 73253 - Mono CVE-2015-2318 Man in the Middle Spoofing Vulnerability

See also: 🔍

Entryinfo

Created: 01/09/2018 08:17
Updated: 01/20/2023 12:34
Changes: 01/09/2018 08:17 (79), 12/28/2019 19:40 (2), 01/20/2023 12:34 (5)
Complete: 🔍
Cache ID: 216::103

Be aware that VulDB is the high quality source for vulnerability data.

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