In numbers.c in libxslt 1.1.33, a type holding grouping characters of an xsl:number instruction was too narrow and an invalid character/length combination could be passed to xsltNumberFormatDecimal, leading to a read of uninitialized stack data.
References
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- http://lists.opensuse.org/opensuse-security-announce/2020-05/msg00062.html
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- https://support.apple.com/kb/HT210356
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- https://support.apple.com/kb/HT210357
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- https://support.apple.com/kb/HT210358
- https://usn.ubuntu.com/4164-1/
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- https://www.oracle.com/security-alerts/cpujan2020.html
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