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f5999f0181
Several functions could overflow their size calculations, when presented with very large inputs from remote and/or untrusted locations, and then allocate buffers that were too small to hold the intended contents. Switch from int to size_t where appropriate, and check for overflow conditions when the inputs could have plausibly originated outside of the libpq trust boundary. (Overflows from within the trust boundary are still possible, but these will be fixed separately.) A version of add_size() is ported from the backend to assist with code that performs more complicated concatenation. Reported-by: Aleksey Solovev (Positive Technologies) Reviewed-by: Noah Misch <noah@leadboat.com> Reviewed-by: Álvaro Herrera <alvherre@kurilemu.de> Security: CVE-2025-12818 Backpatch-through: 13 |
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