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[libxml] Fix integer overflows in xmlBuf and xmlBuffer #5009

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[libxml] Fix integer overflows in xmlBuf and xmlBuffer #5009

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Issue: 399225618

nwellnhof and others added 2 commits January 28, 2025 14:00
@nwellnhof @dahlstrom-g
[CVE-2022-29824] Fix integer overflows in xmlBuf and xmlBuffer
22b6915 
In several places, the code handling string buffers didn't check for
integer overflow or used wrong types for buffer sizes. This could
result in out-of-bounds writes or other memory errors when working on
large, multi-gigabyte buffers.

Thanks to Felix Wilhelm for the report.

(cherry picked from commit 2554a2408e09f13652049e5ffb0d26196b02ebab)
@dahlstrom-g
Designate CVE-2022-29824 as mitigated
62d523c 
Issue: 399225618
Reviewed-on: youtube#5009
@dahlstrom-g dahlstrom-g requested a review from kaidokert March 4, 2025 15:00
@kaidokert kaidokert changed the title Fix integer overflows in xmlBuf and xmlBuffer [libxml] Fix integer overflows in xmlBuf and xmlBuffer Mar 5, 2025
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@kaidokert kaidokert kaidokert approved these changes

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@dahlstrom-g @kaidokert @nwellnhof