PAN-SA-2016-0030 OpenSSL Vulnerabilities
Attack Vector
NETWORK
Scope
UNCHANGED
Attack Complexity
HIGH
Confidentiality Impact
HIGH
Privileges Required
NONE
Integrity Impact
NONE
User Interaction
NONE
Availability Impact
NONE
Description
The OpenSSL library has been found to contain vulnerabilities CVE-2016-0703, CVE-2016-0704, and CVE-2016-0800. Palo Alto Networks software makes use of the vulnerable library. (Ref # PAN-55477/92481)
The OpenSSL library in use by PAN-OS is patched on a regular basis. Severities of the CVEs listed under the summary section range from moderate to high but have not been shown to be exploitable at the time of this advisory.
This issue affects PAN-OS 5.0; PAN-OS 5.1; PAN-OS 6.0.14 and earlier; PAN-OS 6.1.11 and earlier
| CVE | CVSS | Summary |
|---|---|---|
| CVE-2016-0703 | 5.9 (CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N) | The get_client_master_key function in s2_srvr.c in the SSLv2 implementation in OpenSSL before 0.9.8zf, 1.0.0 before 1.0.0r, 1.0.1 before 1.0.1m, and 1.0.2 before 1.0.2a accepts a nonzero CLIENT-MASTER-KEY CLEAR-KEY-LENGTH value for an arbitrary cipher, which allows man-in-the-middle attackers to determine the MASTER-KEY value and decrypt TLS ciphertext data by leveraging a Bleichenbacher RSA padding oracle, a related issue to CVE-2016-0800. |
| CVE-2016-0704 | 5.9 (CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N) | An oracle protection mechanism in the get_client_master_key function in s2_srvr.c in the SSLv2 implementation in OpenSSL before 0.9.8zf, 1.0.0 before 1.0.0r, 1.0.1 before 1.0.1m, and 1.0.2 before 1.0.2a overwrites incorrect MASTER-KEY bytes during use of export cipher suites, which makes it easier for remote attackers to decrypt TLS ciphertext data by leveraging a Bleichenbacher RSA padding oracle, a related issue to CVE-2016-0800. |
| CVE-2016-0800 | 5.9 (CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N) | The SSLv2 protocol, as used in OpenSSL before 1.0.1s and 1.0.2 before 1.0.2g and other products, requires a server to send a ServerVerify message before establishing that a client possesses certain plaintext RSA data, which makes it easier for remote attackers to decrypt TLS ciphertext data by leveraging a Bleichenbacher RSA padding oracle, aka a "DROWN" attack. |
Product Status
| Versions | Affected | Unaffected |
|---|---|---|
| PAN-OS 6.1 | <= 6.1.11 | >= 6.1.12 |
| PAN-OS 6.0 | <= 6.0.14 | >= 6.0.15 |
Severity: MEDIUM
CVSSv3.0 Base Score: 5.9 (CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N)
Weakness Type
Solution
PAN-OS 6.0.15 and later; PAN-OS 6.1.12 and later
Workarounds and Mitigations
N/A