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      <title>CVE-2023-30629 — Vyper's raw_call with outsize=0 and revert_on_failure=False returns incorrect success value</title>
      <link>https://cve.radiocsirt.org/vuln/cve-2023-30629</link>
      <description>&lt;p&gt;&lt;strong&gt;Affected:&lt;/strong&gt; vyperlang vyper&lt;/p&gt;
&lt;p&gt;Vyper is a Pythonic Smart Contract Language for the ethereum virtual machine. In versions 0.3.1 through 0.3.7, the Vyper compiler generates the wrong bytecode. Any contract that uses the `raw_call` with `revert_on_failure=False` and `max_outsize=0` receives the wrong response from `raw_call`. Depending on the memory garbage, the result can be either `True` or `False`. A patch is available and, as of time of publication, anticipated to be part of Vyper 0.3.8. As a workaround, one may always put  `max_outsize&amp;gt;0`.&lt;/p&gt;</description>
      <content:encoded>&lt;p&gt;&lt;strong&gt;Affected:&lt;/strong&gt; vyperlang vyper&lt;/p&gt;
&lt;p&gt;Vyper is a Pythonic Smart Contract Language for the ethereum virtual machine. In versions 0.3.1 through 0.3.7, the Vyper compiler generates the wrong bytecode. Any contract that uses the `raw_call` with `revert_on_failure=False` and `max_outsize=0` receives the wrong response from `raw_call`. Depending on the memory garbage, the result can be either `True` or `False`. A patch is available and, as of time of publication, anticipated to be part of Vyper 0.3.8. As a workaround, one may always put  `max_outsize&amp;gt;0`.&lt;/p&gt;</content:encoded>
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