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patch 9.0.1847: [security] potential oob write in do_addsub()

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Problem:  potential oob write in do_addsub()
Solution: don't overflow buf2, check size in for loop()

Signed-off-by: Christian Brabandt <cb@256bit.org>
This commit is contained in:
Christian Brabandt
2023-09-02 19:43:33 +02:00
parent 4c6fe2e2ea
commit 889f6af371
2 changed files with 3 additions and 1 deletions
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2
src/ops.c
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@@ -2919,7 +2919,7 @@ do_addsub(
for (bit = bits; bit > 0; bit--)
if ((n >> (bit - 1)) & 0x1) break;
for (i = 0; bit > 0; bit--)
for (i = 0; bit > 0 && i < (NUMBUFLEN - 1); bit--)
buf2[i++] = ((n >> (bit - 1)) & 0x1) ? '1' : '0';
buf2[i] = '\0';