diff options
Diffstat (limited to 'system/libsndfile/CVE-2017-12562.patch')
| -rw-r--r-- | system/libsndfile/CVE-2017-12562.patch | 88 |
1 files changed, 0 insertions, 88 deletions
diff --git a/system/libsndfile/CVE-2017-12562.patch b/system/libsndfile/CVE-2017-12562.patch deleted file mode 100644 index f195e87e4..000000000 --- a/system/libsndfile/CVE-2017-12562.patch +++ /dev/null @@ -1,88 +0,0 @@ -From cf7a8182c2642c50f1cf90dddea9ce96a8bad2e8 Mon Sep 17 00:00:00 2001 -From: =?UTF-8?q?J=C3=B6rn=20Heusipp?= <osmanx@problemloesungsmaschine.de> -Date: Wed, 14 Jun 2017 12:25:40 +0200 -Subject: [PATCH] src/common.c: Fix heap buffer overflows when writing strings - in binheader - -Fixes the following problems: - 1. Case 's' only enlarges the buffer by 16 bytes instead of size bytes. - 2. psf_binheader_writef() enlarges the header buffer (if needed) prior to the - big switch statement by an amount (16 bytes) which is enough for all cases - where only a single value gets added. Cases 's', 'S', 'p' however - additionally write an arbitrary length block of data and again enlarge the - buffer to the required amount. However, the required space calculation does - not take into account the size of the length field which gets output before - the data. - 3. Buffer size requirement calculation in case 'S' does not account for the - padding byte ("size += (size & 1) ;" happens after the calculation which - uses "size"). - 4. Case 'S' can overrun the header buffer by 1 byte when no padding is - involved - ("memcpy (&(psf->header.ptr [psf->header.indx]), strptr, size + 1) ;" while - the buffer is only guaranteed to have "size" space available). - 5. "psf->header.ptr [psf->header.indx] = 0 ;" in case 'S' always writes 1 byte - beyond the space which is guaranteed to be allocated in the header buffer. - 6. Case 's' can overrun the provided source string by 1 byte if padding is - involved ("memcpy (&(psf->header.ptr [psf->header.indx]), strptr, size) ;" - where "size" is "strlen (strptr) + 1" (which includes the 0 terminator, - plus optionally another 1 which is padding and not guaranteed to be - readable via the source string pointer). - -Closes: https://github.com/erikd/libsndfile/issues/292 ---- - src/common.c | 15 +++++++-------- - 1 file changed, 7 insertions(+), 8 deletions(-) - -diff --git a/src/common.c b/src/common.c -index 1a6204ca..6b2a2ee9 100644 ---- a/src/common.c -+++ b/src/common.c -@@ -681,16 +681,16 @@ psf_binheader_writef (SF_PRIVATE *psf, const char *format, ...) - /* Write a C string (guaranteed to have a zero terminator). */ - strptr = va_arg (argptr, char *) ; - size = strlen (strptr) + 1 ; -- size += (size & 1) ; - -- if (psf->header.indx + (sf_count_t) size >= psf->header.len && psf_bump_header_allocation (psf, 16)) -+ if (psf->header.indx + 4 + (sf_count_t) size + (sf_count_t) (size & 1) > psf->header.len && psf_bump_header_allocation (psf, 4 + size + (size & 1))) - return count ; - - if (psf->rwf_endian == SF_ENDIAN_BIG) -- header_put_be_int (psf, size) ; -+ header_put_be_int (psf, size + (size & 1)) ; - else -- header_put_le_int (psf, size) ; -+ header_put_le_int (psf, size + (size & 1)) ; - memcpy (&(psf->header.ptr [psf->header.indx]), strptr, size) ; -+ size += (size & 1) ; - psf->header.indx += size ; - psf->header.ptr [psf->header.indx - 1] = 0 ; - count += 4 + size ; -@@ -703,16 +703,15 @@ psf_binheader_writef (SF_PRIVATE *psf, const char *format, ...) - */ - strptr = va_arg (argptr, char *) ; - size = strlen (strptr) ; -- if (psf->header.indx + (sf_count_t) size > psf->header.len && psf_bump_header_allocation (psf, size)) -+ if (psf->header.indx + 4 + (sf_count_t) size + (sf_count_t) (size & 1) > psf->header.len && psf_bump_header_allocation (psf, 4 + size + (size & 1))) - return count ; - if (psf->rwf_endian == SF_ENDIAN_BIG) - header_put_be_int (psf, size) ; - else - header_put_le_int (psf, size) ; -- memcpy (&(psf->header.ptr [psf->header.indx]), strptr, size + 1) ; -+ memcpy (&(psf->header.ptr [psf->header.indx]), strptr, size + (size & 1)) ; - size += (size & 1) ; - psf->header.indx += size ; -- psf->header.ptr [psf->header.indx] = 0 ; - count += 4 + size ; - break ; - -@@ -724,7 +723,7 @@ psf_binheader_writef (SF_PRIVATE *psf, const char *format, ...) - size = (size & 1) ? size : size + 1 ; - size = (size > 254) ? 254 : size ; - -- if (psf->header.indx + (sf_count_t) size > psf->header.len && psf_bump_header_allocation (psf, size)) -+ if (psf->header.indx + 1 + (sf_count_t) size > psf->header.len && psf_bump_header_allocation (psf, 1 + size)) - return count ; - - header_put_byte (psf, size) ; |