Plaintext recovery via fixed CBC initialization vector
Published May 14, 2020 · Updated Sep 17, 2024
Information disclosure in Spring Security allows remote authenticated users to derive plaintext through a dictionary attack. The queryable text encryptor passes a fixed all-zero initialization vector to CBC mode, so candidate values encrypted under the same key produce matching ciphertext. Exploitation requires access to ciphertext and a practical plaintext dictionary; the bounded consequence is recovery of matching encrypted values.
Summary
What happened
Information disclosure in Spring Security allows remote authenticated users to derive plaintext through a dictionary attack. The queryable text encryptor passes a fixed all-zero initialization vector to CBC mode, so candidate values encrypted under the same key produce matching ciphertext. Exploitation requires access to ciphertext and a practical plaintext dictionary; the bounded consequence is recovery of matching encrypted values.
The record
- CVE
- CVE-2020-5408
- Published
- May 14, 2020
- Updated
- Sep 17, 2024
- Vendor
- Spring
- Product
- Spring Security
- Classifications
- CWE-329, CWE-330
- Attack vector
- network
- Privileges
- authenticated
Timeline
How it unfolded
- May 14, 2020CVE publishedPublication date reported by the CVE source.
- Sep 17, 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=4.2 <4.2.16
- Affected versionversion=5.0 <5.0.16
- Affected versionversion=5.1 <5.1.10
- Affected versionversion=5.2 <5.2.4
- Affected versionversion=5.3 <5.3.2
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.
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Technologies
Your stack
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Your stack
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