TLS traffic decryption via enabled RSA ciphers
Published Mar 4, 2022 · Updated Aug 3, 2024
Cryptographic weakness in HCL BigFix Compliance Server 2.0 through 2.0.5 allows remote attackers to decrypt recorded TLS traffic. The server leaves TLS-RSA cipher suites enabled, permitting a ROBOT oracle attack against RSA key exchange when TLS 2.0 and secure ciphers are not enabled. Exploitation requires network access to capture sessions and the insecure cipher configuration; the reported consequence is confidentiality loss only.
Summary
What happened
Cryptographic weakness in HCL BigFix Compliance Server 2.0 through 2.0.5 allows remote attackers to decrypt recorded TLS traffic. The server leaves TLS-RSA cipher suites enabled, permitting a ROBOT oracle attack against RSA key exchange when TLS 2.0 and secure ciphers are not enabled. Exploitation requires network access to capture sessions and the insecure cipher configuration; the reported consequence is confidentiality loss only.
The record
- CVE
- CVE-2021-27756
- Published
- Mar 4, 2022
- Updated
- Aug 3, 2024
- Vendor
- HCL Software
- Product
- HCL BigFix Compliance
- Classifications
- CWE-327, T1040
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Mar 4, 2022CVE publishedPublication date reported by the CVE source.
- Aug 3, 2024Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion="BigFix Compliance Server 2.0 - 2.0.5"
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.
Weakness, pattern, technique
Public exploit references
No public exploit references are available in this record.
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Technologies
Your stack
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Your stack
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