Vulnerability Details : CVE-2021-3047
A cryptographically weak pseudo-random number generator (PRNG) is used during authentication to the Palo Alto Networks PAN-OS web interface. This enables an authenticated attacker, with the capability to observe their own authentication secrets over a long duration on the PAN-OS appliance, to impersonate another authenticated web interface administrator's session. This issue impacts: PAN-OS 8.1 versions earlier than PAN-OS 8.1.19; PAN-OS 9.0 versions earlier than PAN-OS 9.0.14; PAN-OS 9.1 versions earlier than PAN-OS 9.1.10; PAN-OS 10.0 versions earlier than PAN-OS 10.0.4. PAN-OS 10.1 versions are not impacted.
Products affected by CVE-2021-3047
- cpe:2.3:o:paloaltonetworks:pan-os:*:*:*:*:*:*:*:*
- cpe:2.3:o:paloaltonetworks:pan-os:*:*:*:*:*:*:*:*
- cpe:2.3:o:paloaltonetworks:pan-os:*:*:*:*:*:*:*:*
- cpe:2.3:o:paloaltonetworks:pan-os:*:*:*:*:*:*:*:*
Exploit prediction scoring system (EPSS) score for CVE-2021-3047
0.05%
Probability of exploitation activity in the next 30 days
EPSS Score History
~ 21 %
Percentile, the proportion of vulnerabilities that are scored at or less
CVSS scores for CVE-2021-3047
| Base Score | Base Severity | CVSS Vector | Exploitability Score | Impact Score | Score Source | First Seen |
|---|---|---|---|---|---|---|
|
3.5
|
LOW | AV:N/AC:M/Au:S/C:N/I:P/A:N |
6.8
|
2.9
|
NIST | |
|
3.1
|
LOW | CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:L/A:N |
1.6
|
1.4
|
NIST | |
|
4.2
|
MEDIUM | CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:N |
1.6
|
2.5
|
Palo Alto Networks, Inc. |
CWE ids for CVE-2021-3047
-
The product uses a Pseudo-Random Number Generator (PRNG) in a security context, but the PRNG's algorithm is not cryptographically strong.Assigned by:
- nvd@nist.gov (Primary)
- psirt@paloaltonetworks.com (Secondary)
References for CVE-2021-3047
-
https://security.paloaltonetworks.com/CVE-2021-3047
CVE-2021-3047 PAN-OS: Weak Cryptography Used in Web Interface AuthenticationVendor Advisory
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