CVE-2018-11239
published 2018-05-19CVE-2018-11239: An integer overflow in the _transfer function of a smart contract implementation for Hexagon (HXG), an Ethereum ERC20 token, allows attackers to accomplish an…
PriorityP270high7.5CVSS 3.0
AVNACLPRNUINSUCNIHAN
ITWVulnCheck KEV
Exploited in the wild
EPSS
0.93%
56.0th percentile
An integer overflow in the _transfer function of a smart contract implementation for Hexagon (HXG), an Ethereum ERC20 token, allows attackers to accomplish an unauthorized increase of digital assets by providing a _to argument in conjunction with a large _value argument, as exploited in the wild in May 2018, aka the "burnOverflow" issue.
Detection & IOCsextracted from sources · hover to see the quote
- →CVE-2018-11239 ('burnOverflow') targets the _transfer function of ERC-20 token contracts; monitor for transactions supplying an abnormally large _value argument paired with a _to argument that causes integer overflow, resulting in unauthorized token balance increases. ↗
- →This vulnerability class (integer overflow in ERC-20 token _transfer) was actively exploited in the wild in May 2018; review on-chain transaction history of HXG and similar ERC-20 contracts for attack transactions around that period. ↗
- →Integer overflow bugs in ERC-20 Token contracts were repeatedly exploited in high-value contracts; apply differential transaction replay on patched vs. original contracts to identify historical attack transactions (before and after public disclosure). ↗
- ·The vulnerability is specific to the Hexagon (HXG) ERC-20 smart contract's _transfer function on the Ethereum blockchain; no generic Ethereum protocol flaw is involved. ↗
CVSS provenance
nvdv3.07.5HIGHCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
nvdv2.05.0MEDIUMAV:N/AC:L/Au:N/C:N/I:P/A:N
vulncheck7.5HIGH
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GHSA
GHSA-gqmr-2cq4-rr3c: An integer overflow in the _transfer function of a smart contract implementation for Hexagon (HXG), an Ethereum ERC20 token, allows attackers to accom
ghsa_unreviewed·2022-05-14
CVE-2018-11239 [HIGH] CWE-190 GHSA-gqmr-2cq4-rr3c: An integer overflow in the _transfer function of a smart contract implementation for Hexagon (HXG), an Ethereum ERC20 token, allows attackers to accom
An integer overflow in the _transfer function of a smart contract implementation for Hexagon (HXG), an Ethereum ERC20 token, allows attackers to accomplish an unauthorized increase of digital assets by providing a _to argument in conjunction with a large _value argument, as exploited in the wild in May 2018, aka the "burnOverflow" issue.
VulnCheck
hexagontoken hexagon Integer Overflow or Wraparound
vulncheck·2018·CVSS 7.5
CVE-2018-11239 [HIGH] hexagontoken hexagon Integer Overflow or Wraparound
hexagontoken hexagon Integer Overflow or Wraparound
An integer overflow in the _transfer function of a smart contract implementation for Hexagon (HXG), an Ethereum ERC20 token, allows attackers to accomplish an unauthorized increase of digital assets by providing a _to argument in conjunction with a large _value argument, as exploited in the wild in May 2018, aka the "burnOverflow" issue.
Affected: hexagontoken hexagon
Required Action: Apply remediations or mitigations per vendor instructions or discontinue use of the product if remediation or mitigations are unavailable.
Exploitation References: https://www.cve.org/CVERecord?id=CVE-2018-11239
No detection rules found.
No public exploits indexed.
2018-05-19
Published
Exploited in the wild