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Posted to jira@arrow.apache.org by "Mingyu Zhong (Jira)" <ji...@apache.org> on 2020/09/08 23:29:00 UTC
[jira] [Updated] (ARROW-9948) [C++] Decimal128 does not check scale
range when rescaling; can cause buffer overflow
[ https://issues.apache.org/jira/browse/ARROW-9948?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Mingyu Zhong updated ARROW-9948:
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Summary: [C++] Decimal128 does not check scale range when rescaling; can cause buffer overflow (was: Decimal128 does not check scale range when rescaling; can cause buffer overflow)
> [C++] Decimal128 does not check scale range when rescaling; can cause buffer overflow
> -------------------------------------------------------------------------------------
>
> Key: ARROW-9948
> URL: https://issues.apache.org/jira/browse/ARROW-9948
> Project: Apache Arrow
> Issue Type: Bug
> Components: C++
> Reporter: Mingyu Zhong
> Priority: Major
>
> BasicDecimal128::GetScaleMultiplier has a DCHECK on the scale, but the scale can come from users. For example, Decimal128::FromString("1e100") will cause an out-of-bound read.
> BasicDecimal128::Rescale and BasicDecimal128::GetWholeAndFraction have the same problem.
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