pyOpenSSL up to 17.4.x PKCS #12 Store denial of service

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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4.6$0-$5k0.00

Summaryinfo

A vulnerability has been found in pyOpenSSL up to 17.4.x and classified as problematic. Affected by this vulnerability is an unknown functionality of the component PKCS #12 Store. Performing a manipulation results in denial of service. This vulnerability is reported as CVE-2018-1000808. The attack is possible to be carried out remotely. No exploit exists. The affected component should be upgraded.

Detailsinfo

A vulnerability classified as problematic has been found in pyOpenSSL up to 17.4.x (Network Encryption Software). This affects an unknown part of the component PKCS #12 Store. The manipulation with an unknown input leads to a denial of service vulnerability. CWE is classifying the issue as CWE-404. The product does not release or incorrectly releases a resource before it is made available for re-use. This is going to have an impact on availability. The summary by CVE is:

Python Cryptographic Authority pyopenssl version Before 17.5.0 contains a CWE - 401 : Failure to Release Memory Before Removing Last Reference vulnerability in PKCS #12 Store that can result in Denial of service if memory runs low or is exhausted. This attack appear to be exploitable via Depends upon calling application, however it could be as simple as initiating a TLS connection. Anything that would cause the calling application to reload certificates from a PKCS #12 store.. This vulnerability appears to have been fixed in 17.5.0.

The bug was discovered 11/30/2017. The weakness was disclosed 10/08/2018 (GitHub Repository). The advisory is shared at github.com. This vulnerability is uniquely identified as CVE-2018-1000808 since 10/08/2018. 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 T1499 for this issue.

The vulnerability was handled as a non-public zero-day exploit for at least 312 days. During that time the estimated underground price was around $0-$5k. The vulnerability scanner Nessus provides a plugin with the ID 118855 (Ubuntu 16.04 LTS : pyopenssl vulnerabilities (USN-3813-1)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Ubuntu Local Security Checks and running in the context l. The commercial vulnerability scanner Qualys is able to test this issue with plugin 171759 (SUSE Enterprise Linux Security Update for python-cryptography, python-pyOpenSSL (SUSE-SU-2018:4063-1)).

Upgrading to version 17.5.0 eliminates this vulnerability. A possible mitigation has been published 2 months after the disclosure of the vulnerability.

The vulnerability is also documented in the vulnerability database at Tenable (118855). The entry VDB-125036 is pretty similar. If you want to get the best quality for vulnerability data then you always have to consider VulDB.

Productinfo

Type

Name

Version

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 4.8
VulDB Meta Temp Score: 4.6

VulDB Base Score: 3.7
VulDB Temp Score: 3.3
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 5.9
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: Denial of service
CWE: CWE-404
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: 118855
Nessus Name: Ubuntu 16.04 LTS : pyopenssl vulnerabilities (USN-3813-1)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

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

Upgrade: pyOpenSSL 17.5.0
Patch: github.com

Timelineinfo

11/30/2017 🔍
10/08/2018 +311 days 🔍
10/08/2018 +0 days 🔍
10/08/2018 +0 days 🔍
10/09/2018 +1 days 🔍
11/08/2018 +30 days 🔍
11/09/2018 +1 days 🔍
05/23/2023 +1656 days 🔍

Sourcesinfo

Advisory: USN-3813-1
Status: Not defined
Confirmation: 🔍

CVE: CVE-2018-1000808 (🔍)
GCVE (CVE): GCVE-0-2018-1000808
GCVE (VulDB): GCVE-100-125037
See also: 🔍

Entryinfo

Created: 10/09/2018 08:23
Updated: 05/23/2023 09:03
Changes: 10/09/2018 08:23 (73), 03/31/2020 15:13 (3), 05/23/2023 09:01 (5), 05/23/2023 09:03 (1)
Complete: 🔍
Cache ID: 216::103

If you want to get the best quality for vulnerability data then you always have to consider VulDB.

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