Unauthenticated buffer-memory disclosure via malformed MPLS packets
Published Jul 22, 2021 · Updated Nov 7, 2024
Buffer over-read in Cisco SD-WAN Software allows remote attackers to read MPLS buffer memory through a malformed MPLS packet. Its MPLS packet handler inadequately validates malformed packets and reads beyond the intended buffer boundary into adjacent buffer memory. No authentication or user interaction is required; a reachable affected device can disclose sensitive memory contents without reported integrity or availability impact.
Summary
What happened
Buffer over-read in Cisco SD-WAN Software allows remote attackers to read MPLS buffer memory through a malformed MPLS packet. Its MPLS packet handler inadequately validates malformed packets and reads beyond the intended buffer boundary into adjacent buffer memory. No authentication or user interaction is required; a reachable affected device can disclose sensitive memory contents without reported integrity or availability impact.
The record
- CVE
- CVE-2021-1614
- Published
- Jul 22, 2021
- Updated
- Nov 7, 2024
- Vendor
- ClamAV
- Product
- Cisco SD-WAN
- Classifications
- CWE-126
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Jul 22, 2021CVE publishedPublication date reported by the CVE source.
- Nov 7, 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=n/a
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