Signature disclosure via non-constant-time comparison
Published Dec 28, 2022 · Updated Nov 19, 2024
Observable timing discrepancy in InSTEDD Nuntium before 2022-11-23 allows remote attackers to infer a GeoPoll request signature. The GeoPoll incoming action compares the supplied Signature parameter with an MD5-derived expected value using an ordinary inequality operator, causing input-dependent response timing. The action bypasses the normal login filter, but exploitation requires valid account and channel identifiers plus repeated measurements; the reported consequence is disclosure of signature information.
Summary
What happened
Observable timing discrepancy in InSTEDD Nuntium before 2022-11-23 allows remote attackers to infer a GeoPoll request signature. The GeoPoll incoming action compares the supplied Signature parameter with an MD5-derived expected value using an ordinary inequality operator, causing input-dependent response timing. The action bypasses the normal login filter, but exploitation requires valid account and channel identifiers plus repeated measurements; the reported consequence is disclosure of signature information.
The record
- CVE
- CVE-2022-4823
- Published
- Dec 28, 2022
- Updated
- Nov 19, 2024
- Vendor
- InSTEDD
- Product
- Nuntium
- Classifications
- CWE-208, CWE-203
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Dec 28, 2022CVE publishedPublication date reported by the CVE source.
- Nov 19, 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?
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.
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