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CVE-2021-40426.patch
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File CVE-2021-40426.patch of Package A_15.5-sox
From: Helmut Grohne <helmut@subdivi.de> Subject: sphere: avoid integer underflow Link: https://talosintelligence.com/vulnerability_reports/TALOS-2021-1434 Bug: https://sourceforge.net/p/sox/bugs/362/ Bug-Debian: https://bugs.debian.org/1012138 --- a/src/sphere.c +++ b/src/sphere.c @@ -63,7 +63,8 @@ return (SOX_EOF); } - header_size -= (strlen(buf) + 1); + bytes_read = strlen(buf); + header_size -= bytes_read >= header_size ? header_size : bytes_read + 1; while (strncmp(buf, "end_head", (size_t)8) != 0) { if (strncmp(buf, "sample_n_bytes", (size_t)14) == 0) @@ -105,7 +106,8 @@ return (SOX_EOF); } - header_size -= (strlen(buf) + 1); + bytes_read = strlen(buf); + header_size -= bytes_read >= header_size ? header_size : bytes_read + 1; } if (!bytes_per_sample)
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