A security vulnerability has been identified in all supported versions of OpenSSL related to the verification of X.509 certificate chains that include policy constraints. Attackers may be able to exploit this vulnerability by creating a malicious certificate chain that triggers exponential use of computational resources, leading to a denial-of-service (DoS) attack on affected systems. Policy processing is disabled by default but can be enabled by passing the `-policy' argument to the command line utilities or by calling the `X509_VERIFY_PARAM_set1_policies()' function.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
| Attack Vector | NETWORK |
|---|---|
| Attack Complexity | LOW |
| Privileges Required | NONE |
| User Interaction | NONE |
| Scope | UNCHANGED |
| Confidentiality Impact | NONE |
| Integrity Impact | NONE |
| Availability Impact | HIGH |
| Source | Type | Description |
|---|---|---|
| [email protected] | Primary |
en
CWE-295
|
| 134c704f-9b21-4f2e-91b3-4a467353bcc0 | Secondary |
en
CWE-295
|
| Vendor | Product | Version | Update | Type |
|---|---|---|---|---|
| openssl | openssl | * | <built-in method update of dict object at 0x7fd2a0475200> | Application |
| openssl | openssl | * | <built-in method update of dict object at 0x7fd368d2a940> | Application |
| openssl | openssl | * | <built-in method update of dict object at 0x7fd3849a3440> | Application |
| openssl | openssl | * | <built-in method update of dict object at 0x7fd3849a0840> | Application |
| Vulnerable | CPE |
|---|---|
| Yes | cpe:2.3:a:openssl:openssl:*:*:*:*:*:*:*:* |
| Yes | cpe:2.3:a:openssl:openssl:*:*:*:*:*:*:*:* |
| Yes | cpe:2.3:a:openssl:openssl:*:*:*:*:*:*:*:* |
| Yes | cpe:2.3:a:openssl:openssl:*:*:*:*:*:*:*:* |