Account hijacking via verify hash token
Published Apr 1, 2020 · Updated Aug 4, 2024
Session fixation in redpwn rCTF before 2.3 allows remote attackers to log victims into an attacker-controlled team via a crafted /verify URL hash. The client reads a #token value from the URL fragment and submits it directly to verification, replacing the victim's authenticated team session with the supplied team code. Exploitation requires a victim to follow the crafted link, such as through stored XSS in a challenge, and lets the attacker obtain submitted flags and associated competition points.
Summary
What happened
Session fixation in redpwn rCTF before 2.3 allows remote attackers to log victims into an attacker-controlled team via a crafted /verify URL hash. The client reads a #token value from the URL fragment and submits it directly to verification, replacing the victim's authenticated team session with the supplied team code. Exploitation requires a victim to follow the crafted link, such as through stored XSS in a challenge, and lets the attacker obtain submitted flags and associated competition points.
The record
- CVE
- CVE-2020-5290
- Published
- Apr 1, 2020
- Updated
- Aug 4, 2024
- Vendor
- redpwn
- Product
- rCTF
- Classifications
- CWE-384
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Apr 1, 2020CVE publishedPublication date reported by the CVE source.
- Aug 4, 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?
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- Affected versionversion=< 2.3
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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