PAN-SA-2018-0015 OpenSSL Vulnerabilities in PAN-OS
Description
The OpenSSL library has been found to contain vulnerabilities CVE-2018-0732, CVE-2018-0737, and CVE-2018-0739. Palo Alto Networks software makes use of the vulnerable library and is affected. (Ref # PAN-98504/ CVE-2018-0732, CVE-2018-0737, and CVE-2018-0739)
The OpenSSL library in use by PAN-OS is patched on a regular basis for security issues.
This issue affects PAN-OS 6.1.20 and earlier, PAN-OS 7.1.20 and earlier, PAN-OS 8.0.13 and earlier, and PAN-OS 8.1.3 and earlier. WF-500 running WF-500 software versions PAN-OS 6.1.20 and earlier, PAN-OS 7.1.20 and earlier, PAN-OS 8.0.13 and earlier, and PAN-OS 8.1.3 and earlier.
| CVE | CVSS | Summary |
|---|---|---|
| CVE-2018-0732 | 7.5 (CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H) | During key agreement in a TLS handshake using a DH(E) based ciphersuite a malicious server can send a very large prime value to the client. This will cause the client to spend an unreasonably long period of time generating a key for this prime resulting in a hang until the client has finished. This could be exploited in a Denial Of Service attack. Fixed in OpenSSL 1.1.0i-dev (Affected 1.1.0-1.1.0h). Fixed in OpenSSL 1.0.2p-dev (Affected 1.0.2-1.0.2o). |
| CVE-2018-0737 | 5.9 (CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N) | The OpenSSL RSA Key generation algorithm has been shown to be vulnerable to a cache timing side channel attack. An attacker with sufficient access to mount cache timing attacks during the RSA key generation process could recover the private key. Fixed in OpenSSL 1.1.0i-dev (Affected 1.1.0-1.1.0h). Fixed in OpenSSL 1.0.2p-dev (Affected 1.0.2b-1.0.2o). |
| CVE-2018-0739 | 6.5 (CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H) | Constructed ASN.1 types with a recursive definition (such as can be found in PKCS7) could eventually exceed the stack given malicious input with excessive recursion. This could result in a Denial Of Service attack. There are no such structures used within SSL/TLS that come from untrusted sources so this is considered safe. Fixed in OpenSSL 1.1.0h (Affected 1.1.0-1.1.0g). Fixed in OpenSSL 1.0.2o (Affected 1.0.2b-1.0.2n). |
Product Status
| Versions | Affected | Unaffected |
|---|---|---|
| PAN-OS 8.1 | <= 8.1.3 | >= 8.1.4 |
| PAN-OS 8.0 | <= 8.0.13 | >= 8.0.14 |
| PAN-OS 7.1 | <= 7.1.20 | >= 7.1.21 |
| PAN-OS 6.1 | <= 6.1.20 |
Severity: HIGH
CVSSv3.1 Base Score: 7.5 (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H)
Weakness Type
Solution
PAN-OS 7.1.21 and later, PAN-OS 8.0.14 and later, PAN-OS 8.1.4 and later, WF-500 running WF-500 software version 8.0.14 and later, and WF-500 running WF-500 software version 8.1.4 and later. PAN-OS 6.1 will NOT have a fix. For WF-500 software versions 7.1 and earlier, please consult the WildFire Administrator’s Guide for steps to upgrade the software. An online copy of all available documentation can be found here (https://www.paloaltonetworks.com/documentation).
Workarounds and Mitigations
N/A