OpenBSD OpenSMTPD 5.3.1 Locking cryptographic issue

CVSS Meta Temp Score
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CTI Interest Score
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5.1$0-$5k0.00

Summaryinfo

A vulnerability was found in OpenBSD OpenSMTPD 5.3.1. It has been classified as problematic. This impacts an unknown function of the component Locking. Performing a manipulation results in cryptographic issue. This vulnerability is reported as CVE-2013-2125. No exploit exists. Applying a patch is the recommended action to fix this issue.

Detailsinfo

A vulnerability was found in OpenBSD OpenSMTPD 5.3.1 (Operating System). It has been classified as problematic. This affects an unknown code block of the component Locking. The manipulation with an unknown input leads to a cryptographic issue vulnerability. CWE is classifying the issue as CWE-310. This is going to have an impact on availability. The summary by CVE is:

OpenSMTPD before 5.3.2 does not properly handle SSL sessions, which allows remote attackers to cause a denial of service (connection blocking) by keeping a connection open.

The weakness was disclosed 05/27/2014 by Jason A. Donenfeld as confirmed git commit (GIT Repository). The advisory is shared at git.zx2c4.com. This vulnerability is uniquely identified as CVE-2013-2125 since 02/19/2013. The exploitability is told to be easy. It is possible to initiate the attack remotely. No form of authentication is needed for exploitation. Neither technical details nor an exploit are publicly available. MITRE ATT&CK project uses the attack technique T1600 for this issue.

The vulnerability scanner Nessus provides a plugin with the ID 66586 (OpenSMTPD TLS Blocking Socket Remote DoS), which helps to determine the existence of the flaw in a target environment. It is assigned to the family SMTP problems.

Upgrading to version 5.3.1 eliminates this vulnerability. Applying a patch is able to eliminate this problem. The bugfix is ready for download at git.zx2c4.com. The best possible mitigation is suggested to be patching the affected component.

The vulnerability is also documented in the databases at X-Force (84388), Tenable (66586), SecurityFocus (BID 59985†), OSVDB (93495†) and Secunia (SA53353†). If you want to get the best quality for vulnerability data then you always have to consider VulDB.

Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.3
VulDB Meta Temp Score: 5.1

VulDB Base Score: 5.3
VulDB Temp Score: 5.1
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
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NVD Base Score: 🔍

Exploitinginfo

Class: Cryptographic issue
CWE: CWE-310
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: 66586
Nessus Name: OpenSMTPD TLS Blocking Socket Remote DoS
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍

Threat Intelligenceinfo

Interest: 🔍
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Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Patch
Status: 🔍

0-Day Time: 🔍

Upgrade: OpenSMTPD 5.3.1
Patch: git.zx2c4.com

Timelineinfo

02/19/2013 🔍
05/16/2013 +86 days 🔍
05/16/2013 +0 days 🔍
05/21/2013 +5 days 🔍
05/24/2013 +3 days 🔍
05/29/2013 +5 days 🔍
05/27/2014 +363 days 🔍
05/27/2014 +0 days 🔍
03/25/2015 +302 days 🔍
03/22/2022 +2554 days 🔍

Sourcesinfo

Vendor: openbsd.org

Advisory: git.zx2c4.com
Researcher: Jason A. Donenfeld
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2013-2125 (🔍)
GCVE (CVE): GCVE-0-2013-2125
GCVE (VulDB): GCVE-100-69837
X-Force: 84388
SecurityFocus: 59985 - OpenSMTPD CVE-2013-2125 Denial of Service Vulnerability
Secunia: 53353 - OpenSMTPD SSL Session Handling Denial of Service Vulnerability, Moderately Critical
OSVDB: 93495
Vulnerability Center: 39756 - OpenSMTPD 5.3.1 Allows Remote DoS Vulnerability Due to an Error in SSL Handshakes, Medium

Entryinfo

Created: 03/25/2015 16:45
Updated: 03/22/2022 08:20
Changes: 03/25/2015 16:45 (67), 05/01/2017 11:15 (7), 03/22/2022 08:20 (3)
Complete: 🔍
Cache ID: 216::103

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