Access-control bypass via unchecked auction duration
Published Sep 7, 2021 · Updated Aug 4, 2024
Access-control bypass in AMFEIX PepeAuctionSale 1.0 allows remote attackers to defeat auction timing via a large duration value. The contract's publicly accessible initialization logic assigns the unvalidated _duration argument to auctionEnd, letting an extreme value keep the subsequent time check satisfied. Because the affected function requires no authentication, an attacker can extend the accepted auction period and bypass the intended time-based access restriction.
Summary
What happened
Access-control bypass in AMFEIX PepeAuctionSale 1.0 allows remote attackers to defeat auction timing via a large duration value. The contract's publicly accessible initialization logic assigns the unvalidated _duration argument to auctionEnd, letting an extreme value keep the subsequent time check satisfied. Because the affected function requires no authentication, an attacker can extend the accepted auction period and bypass the intended time-based access restriction.
The record
- CVE
- CVE-2020-19766
- Published
- Sep 7, 2021
- Updated
- Aug 4, 2024
- Vendor
- Unknown vendor
- Product
- Unknown product
- Classifications
- CWE-754, T1565.001
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Sep 7, 2021CVE 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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What is affected?
Affected products and versions are unavailable in this record.
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
- Large-duration time-check bypass descriptionproof of concept · unverified
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Technologies
Your stack
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Your stack
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