Ruby up to 2.0.0 Patchlevel 644/2.1.5/2.2.1 OpenSSL Extension verify_certificate_identity Certificate input validation
CVSS Meta Temp Score | Current Exploit Price (≈) | CTI Interest Score |
---|---|---|
5.6 | $0-$5k | 0.00 |
A vulnerability was found in Ruby up to 2.0.0 Patchlevel 644/2.1.5/2.2.1 (Programming Language Software). It has been classified as critical. Affected is the function verify_certificate_identity
of the component OpenSSL Extension. The manipulation as part of a Certificate leads to a input validation vulnerability. CWE is classifying the issue as CWE-20. The product receives input or data, but it does
not validate or incorrectly validates that the input has the
properties that are required to process the data safely and
correctly. This is going to have an impact on confidentiality, integrity, and availability. CVE summarizes:
verify_certificate_identity in the OpenSSL extension in Ruby before 2.0.0 patchlevel 645, 2.1.x before 2.1.6, and 2.2.x before 2.2.2 does not properly validate hostnames, which allows remote attackers to spoof servers via vectors related to (1) multiple wildcards, (1) wildcards in IDNA names, (3) case sensitivity, and (4) non-ASCII characters.
The bug was discovered 04/13/2015. The weakness was presented 11/29/2019. This vulnerability is traded as CVE-2015-1855. The exploitability is told to be difficult. It is possible to launch the attack remotely. The exploitation doesn't require any form of authentication. There are known technical details, but no exploit is available.
The vulnerability was handled as a non-public zero-day exploit for at least 44 days. During that time the estimated underground price was around $0-$5k. The vulnerability scanner Nessus provides a plugin with the ID 83881 (Amazon Linux AMI : ruby18 (ALAS-2015-529)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Amazon Linux Local Security Checks and running in the context l.
Upgrading to version 2.0.0 Patchlevel 645, 2.1.6 or 2.2.2 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 vulnerability database at Tenable (83881). See 75229 for similar entry.
Product
Type
Name
Version
License
CPE 2.3
CPE 2.2
CVSSv4
VulDB CVSS-B Score: 🔍VulDB CVSS-BT Score: 🔍
VulDB Vector: 🔍
VulDB Reliability: 🔍
CVSSv3
VulDB Meta Base Score: 5.7VulDB Meta Temp Score: 5.6
VulDB Base Score: 5.6
VulDB Temp Score: 5.4
VulDB Vector: 🔍
VulDB Reliability: 🔍
NVD Base Score: 5.9
NVD Vector: 🔍
CVSSv2
AV | AC | Au | C | I | A |
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💳 | 💳 | 💳 | 💳 | 💳 | 💳 |
💳 | 💳 | 💳 | 💳 | 💳 | 💳 |
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Vector | Complexity | Authentication | Confidentiality | Integrity | Availability |
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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: 🔍
Exploiting
Class: Input validationCWE: CWE-20
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: 83881
Nessus Name: Amazon Linux AMI : ruby18 (ALAS-2015-529)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍
OpenVAS ID: 902047
OpenVAS Name: Amazon Linux Local Check: ALAS-2015-533
OpenVAS File: 🔍
OpenVAS Family: 🔍
Threat Intelligence
Interest: 🔍Active Actors: 🔍
Active APT Groups: 🔍
Countermeasures
Recommended: UpgradeStatus: 🔍
0-Day Time: 🔍
Upgrade: Ruby 2.0.0 Patchlevel 645/2.1.6/2.2.2
Timeline
02/17/2015 🔍04/13/2015 🔍
05/27/2015 🔍
05/29/2015 🔍
11/29/2019 🔍
12/03/2019 🔍
03/05/2024 🔍
Sources
Advisory: 9644Status: Not defined
CVE: CVE-2015-1855 (🔍)
OVAL: 🔍
See also: 🔍
Entry
Created: 12/03/2019 15:59Updated: 03/05/2024 08:43
Changes: 12/03/2019 15:59 (44), 12/03/2019 16:04 (28), 03/05/2024 08:43 (6)
Complete: 🔍
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