Plaintext recovery via CBC record timing oracle
Published Jul 17, 2026 · Updated Jul 17, 2026
Lucky 13 timing exposure in HCLSoftware Aftermarket EPC 1.0.0 allows man-in-the-middle attackers to recover TLS plaintext. The TLS/DTLS CBC record path exposes padding-dependent timing differences during decryption and MAC verification, creating a plaintext-recovery oracle. Exploitation requires an on-path position, CBC-mode traffic, many crafted records, and statistical timing analysis; the reported impact is limited disclosure of transmitted data.
Summary
What happened
Lucky 13 timing exposure in HCLSoftware Aftermarket EPC 1.0.0 allows man-in-the-middle attackers to recover TLS plaintext. The TLS/DTLS CBC record path exposes padding-dependent timing differences during decryption and MAC verification, creating a plaintext-recovery oracle. Exploitation requires an on-path position, CBC-mode traffic, many crafted records, and statistical timing analysis; the reported impact is limited disclosure of transmitted data.
The record
- CVE
- CVE-2024-23573
- Published
- Jul 17, 2026
- Updated
- Jul 17, 2026
- Vendor
- HCLSoftware
- Product
- Aftermarket EPC
- Classifications
- CWE-425, T1557
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Jul 17, 2026CVE publishedPublication date reported by the CVE source.
- Jul 17, 2026Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
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- Affected versionversion=version 1.0.0
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
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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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