Cisco IOS on 64-bit Preboot eXecution Environment Boot Loader access control
CVSS Meta Temp Score | Current Exploit Price (≈) | CTI Interest Score |
---|---|---|
9.4 | $5k-$25k | 0.00 |
A vulnerability has been found in Cisco IOS on 64-bit (Router Operating System) (version unknown) and classified as very critical. Affected by this vulnerability is an unknown function of the component Preboot eXecution Environment Boot Loader. The manipulation with an unknown input leads to a access control vulnerability. The CWE definition for the vulnerability is CWE-284. The product does not restrict or incorrectly restricts access to a resource from an unauthorized actor. As an impact it is known to affect confidentiality, integrity, and availability.
The weakness was shared 11/07/2020 as cisco-sa-iosxr-pxe-unsign-code-exec-qAa78fD2. It is possible to read the advisory at tools.cisco.com. This vulnerability is known as CVE-2020-3284. The exploitation appears to be easy. The attack can be launched remotely. The exploitation doesn't need any form of authentication. The technical details are unknown and an exploit is not publicly available. The pricing for an exploit might be around USD $5k-$25k at the moment (estimation calculated on 12/03/2020). The attack technique deployed by this issue is T1068 according to MITRE ATT&CK.
We expect the 0-day to have been worth approximately $25k-$100k.
Upgrading eliminates this vulnerability.
Product
Type
Vendor
Name
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: 9.8VulDB Meta Temp Score: 9.6
VulDB Base Score: 9.8
VulDB Temp Score: 9.4
VulDB Vector: 🔍
VulDB Reliability: 🔍
NVD Base Score: 9.8
NVD Vector: 🔍
CVSSv2
AV | AC | Au | C | I | A |
---|---|---|---|---|---|
💳 | 💳 | 💳 | 💳 | 💳 | 💳 |
💳 | 💳 | 💳 | 💳 | 💳 | 💳 |
💳 | 💳 | 💳 | 💳 | 💳 | 💳 |
Vector | Complexity | Authentication | Confidentiality | Integrity | Availability |
---|---|---|---|---|---|
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: Access controlCWE: CWE-284 / CWE-266
ATT&CK: T1068
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 |
Threat Intelligence
Interest: 🔍Active Actors: 🔍
Active APT Groups: 🔍
Countermeasures
Recommended: UpgradeStatus: 🔍
0-Day Time: 🔍
Timeline
12/12/2019 🔍11/07/2020 🔍
11/07/2020 🔍
12/03/2020 🔍
Sources
Vendor: cisco.comAdvisory: cisco-sa-iosxr-pxe-unsign-code-exec-qAa78fD2
Status: Confirmed
CVE: CVE-2020-3284 (🔍)
Entry
Created: 11/07/2020 07:11Updated: 12/03/2020 16:42
Changes: 11/07/2020 07:11 (26), 11/07/2020 07:12 (16), 12/03/2020 16:35 (2), 12/03/2020 16:42 (17)
Complete: 🔍
No comments yet. Languages: en.
Please log in to comment.