Authenticated file access via incorrect SFTP role check
Published Aug 23, 2023 · Updated Oct 2, 2024
Authorization failure in Cisco NX-OS Software allows remote authenticated users to read or overwrite device files through SFTP. The SFTP connection handler incorrectly accepts a valid non-administrator role and grants file operations with that account's underlying privileges. Exploitation requires a vulnerable Nexus 3000 or standalone-mode Nexus 9000 switch with the SFTP server enabled, a feature disabled by default.
Summary
What happened
Authorization failure in Cisco NX-OS Software allows remote authenticated users to read or overwrite device files through SFTP. The SFTP connection handler incorrectly accepts a valid non-administrator role and grants file operations with that account's underlying privileges. Exploitation requires a vulnerable Nexus 3000 or standalone-mode Nexus 9000 switch with the SFTP server enabled, a feature disabled by default.
The record
- CVE
- CVE-2023-20115
- Published
- Aug 23, 2023
- Updated
- Oct 2, 2024
- Vendor
- ClamAV
- Product
- Cisco NX-OS Software
- Classifications
- CWE-671, T1190
- Attack vector
- network
- Privileges
- authenticated
Timeline
How it unfolded
- Aug 23, 2023CVE publishedPublication date reported by the CVE source.
- Oct 2, 2024Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
Compare your product and version with the public record. A matching version still requires validation against your environment.
Is a vulnerable build present?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=10.1(1)
- Affected versionversion=10.1(2)
- Affected versionversion=10.1(2t)
- Affected versionversion=10.2(1)
- Affected versionversion=10.2(1q)
- Affected versionversion=10.2(2)
- Affected versionversion=10.2(3)
- Affected versionversion=10.2(3t)
- Affected versionversion=10.2(4)
- Affected versionversion=10.2(5)
- Affected versionversion=10.3(1)
- Affected versionversion=10.3(2)
- Affected versionversion=9.2(1)
- Affected versionversion=9.2(2)
- Affected versionversion=9.2(2t)
- Affected versionversion=9.2(2v)
- Affected versionversion=9.2(3)
- Affected versionversion=9.2(4)
- Affected versionversion=9.3(1)
- Affected versionversion=9.3(10)
- Affected versionversion=9.3(11)
- Affected versionversion=9.3(2)
- Affected versionversion=9.3(3)
- Affected versionversion=9.3(4)
- Affected versionversion=9.3(5)
- Affected versionversion=9.3(6)
- Affected versionversion=9.3(7)
- Affected versionversion=9.3(7a)
- Affected versionversion=9.3(8)
- Affected versionversion=9.3(9)
What conditions does exploitation require?
What is affected?
Published CVSS scores
CVSS describes severity. EPSS estimates exploitation probability.
Attacks
What attackers are doing with it
Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.
Weakness, pattern, technique
Public exploit references
No public exploit references are available in this record.
Labels summarize the accepted research assessment. They do not indicate a test against your environment.
Technologies
Your stack
See the directory against your own environment.
Your stack
Check the software in your environment
Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.
Book a demo