CVE-2023-20046
published 2023-05-09CVE-2023-20046: A vulnerability in the key-based SSH authentication feature of Cisco StarOS Software could allow an authenticated, remote attacker to elevate privileges on an…
PriorityP260high8.8CVSS 3.1
AVNACLPRLUINSUCHIHAH
EPSS
0.86%
54.3th percentile
A vulnerability in the key-based SSH authentication feature of Cisco StarOS Software could allow an authenticated, remote attacker to elevate privileges on an affected device.
This vulnerability is due to insufficient validation of user-supplied credentials. An attacker could exploit this vulnerability by sending a valid low-privileged SSH key to an affected device from a host that has an IP address that is configured as the source for a high-privileged user account. A successful exploit could allow the attacker to log in to the affected device through SSH as a high-privileged user.
There are workarounds that address this vulnerability.
Affected
416 ranges· showing 25
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| cisco | cisco_asr_5000_series_software | — | — |
| cisco | cisco_asr_5000_series_software | — | — |
| cisco | cisco_asr_5000_series_software | — | — |
| cisco | cisco_asr_5000_series_software | — | — |
| cisco | cisco_asr_5000_series_software | — | — |
| cisco | cisco_asr_5000_series_software | — | — |
| cisco | cisco_asr_5000_series_software | — | — |
| cisco | cisco_asr_5000_series_software | — | — |
| cisco | cisco_asr_5000_series_software | — | — |
| cisco | cisco_asr_5000_series_software | — | — |
| cisco | cisco_asr_5000_series_software | — | — |
| cisco | cisco_asr_5000_series_software | — | — |
| cisco | cisco_asr_5000_series_software | — | — |
| cisco | cisco_asr_5000_series_software | — | — |
| cisco | cisco_asr_5000_series_software | — | — |
| cisco | cisco_asr_5000_series_software | — | — |
| cisco | cisco_asr_5000_series_software | — | — |
| cisco | cisco_asr_5000_series_software | — | — |
| cisco | cisco_asr_5000_series_software | — | — |
| cisco | cisco_asr_5000_series_software | — | — |
| cisco | cisco_asr_5000_series_software | — | — |
| cisco | cisco_asr_5000_series_software | — | — |
| cisco | cisco_asr_5000_series_software | — | — |
| cisco | cisco_asr_5000_series_software | — | — |
| cisco | cisco_asr_5000_series_software | — | — |
Detection & IOCsextracted from sources · hover to see the quote
- →Attacker exploits SSH key-based authentication by sending a valid low-privileged SSH key from a source IP configured for a high-privileged user account, resulting in privilege escalation login via SSH ↗
- →Monitor for SSH logins to Cisco StarOS devices where the authenticating SSH key belongs to a low-privileged user but the resulting session is granted high-privileged access ↗
- →Track Cisco internal bug ID CSCwd89468 for patch and indicator correlation related to this vulnerability ↗
- ·The vulnerability is triggered only when an attacker's source IP address matches one configured as the source for a high-privileged user account on the device; review StarOS SSH source-IP-to-user mappings for misconfigurations or abuse ↗
- ·Workarounds exist and should be applied if patching is not immediately possible; consult the Cisco advisory for specific workaround steps ↗
- ·Root cause is insufficient validation of user-supplied credentials (CWE-289 Authentication Bypass by Alternate Name); the device does not properly validate that the SSH key presented corresponds to the privilege level of the authenticated user ↗
CVSS provenance
nvdv3.18.8HIGHCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
vendor_cisco8.8HIGH
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Cisco
Cisco StarOS Software Key-Based SSH Authentication Privilege Escalation Vulnerability
vendor_cisco·2023-04-19·CVSS 8.8
CVE-2023-20046 [HIGH] CWE-289 Cisco StarOS Software Key-Based SSH Authentication Privilege Escalation Vulnerability
Cisco StarOS Software Key-Based SSH Authentication Privilege Escalation Vulnerability
A vulnerability in the key-based SSH authentication feature of Cisco StarOS Software could allow an authenticated, remote attacker to elevate privileges on an affected device.
This vulnerability is due to insufficient validation of user-supplied credentials. An attacker could exploit this vulnerability by sending a valid low-privileged SSH key to an affected device from a host that has an IP address that is configured as the source for a high-privileged user account. A successful exploit could allow the attacker to log in to the affected device through SSH as a high-privileged user.
Cisco has released software updates that address this vulnerability. There are workarounds that address this vulnerability
Cisco
Cisco StarOS Software Key-Based SSH Authentication Privilege Escalation Vulnerability
vendor_cisco·CVSS 3.1
CVE-2023-20046 Cisco StarOS Software Key-Based SSH Authentication Privilege Escalation Vulnerability
CVE-2023-20046: Cisco StarOS Software Key-Based SSH Authentication Privilege Escalation Vulnerability
A vulnerability in the key-based SSH authentication feature of Cisco StarOS Software could allow an authenticated, remote attacker to elevate privileges on an affected device. This vulnerability is due to insufficient validation of user-supplied credentials. An attacker could exploit this vulnerability by sending a valid low-privileged SSH key to an affected device from a host that has an IP address that is configured as the source for a high-privileged user account. A successful exploit could allow the attacker to log in to the affected device through SSH as a high-privileged user. Cisco has released software updates that address this vulnerability. There are
CVSS: 3.1
CWE: CWE-289, CWE-2
No detection rules found.
No public exploits indexed.
No writeups or analysis indexed.
2023-05-09
Published