Account takeover via predictable password-reset tokens
Published Aug 12, 2024 · Updated Aug 12, 2024
Weak password-reset tokens in FIWARE Keyrock 8.4 and earlier allow remote authenticated users to take over any user account. The reset flow derives tokens from Math.random(), converts each value to base 36, and truncates it with substr(2), exposing reversible PRNG output. A registered attacker who collects 10–20 tokens from self-service reset requests can reconstruct the generator state, predict a victim's next token, reset that password, and assume the account.
Summary
What happened
Weak password-reset tokens in FIWARE Keyrock 8.4 and earlier allow remote authenticated users to take over any user account. The reset flow derives tokens from Math.random(), converts each value to base 36, and truncates it with substr(2), exposing reversible PRNG output. A registered attacker who collects 10–20 tokens from self-service reset requests can reconstruct the generator state, predict a victim's next token, reset that password, and assume the account.
The record
- CVE
- CVE-2024-42163
- Published
- Aug 12, 2024
- Updated
- Aug 12, 2024
- Vendor
- FIWARE
- Product
- Keyrock
- Classifications
- CWE-326, T1098
- Attack vector
- network
- Privileges
- authenticated
Timeline
How it unfolded
- Aug 12, 2024CVE publishedPublication date reported by the CVE source.
- Aug 12, 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=0 <=8.4
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.
Public exploit references
- AIT password-reset token prediction proof of conceptproof of concept · demonstrated
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Technologies
Your stack
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Your stack
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