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| author | midipix <writeonce@midipix.org> | 2024-01-25 23:53:21 +0000 |
|---|---|---|
| committer | midipix <writeonce@midipix.org> | 2024-01-26 00:11:34 +0000 |
| commit | 380c44ed3129bbeda274350db707c7021e27696d (patch) | |
| tree | 1d208d55dc763cf75775c1e23a8a36d74e7e579a | |
| parent | 5152c7da6315728cbf21fc46c4365004c08a2377 (diff) | |
| download | slibtool-380c44ed3129bbeda274350db707c7021e27696d.tar.bz2 slibtool-380c44ed3129bbeda274350db707c7021e27696d.tar.xz | |
slbt_ar_parse_primary_armap_bsd_32(): more strictly validate the string table.
| -rw-r--r-- | src/arbits/slbt_archive_meta.c | 22 |
1 files changed, 21 insertions, 1 deletions
diff --git a/src/arbits/slbt_archive_meta.c b/src/arbits/slbt_archive_meta.c index 30fb022..1b23c24 100644 --- a/src/arbits/slbt_archive_meta.c +++ b/src/arbits/slbt_archive_meta.c @@ -245,6 +245,7 @@ static int slbt_ar_parse_primary_armap_bsd_32( uint32_t sizeofrefs; uint32_t sizeofstrs; const char * ch; + const char * cap; unsigned char * uch; unsigned char (*mark)[0x04]; @@ -291,20 +292,39 @@ static int slbt_ar_parse_primary_armap_bsd_32( m->symstrs = (const char *)mark; + cap = memberp->ar_object_data; + cap += memberp->ar_object_size; + + if ((cap == m->symstrs) && nsyms) + return SLBT_CUSTOM_ERROR( + dctx, + SLBT_ERR_AR_INVALID_ARMAP_STRING_TABLE); + if (nsyms && !m->symstrs[0]) return SLBT_CUSTOM_ERROR( dctx, SLBT_ERR_AR_INVALID_ARMAP_STRING_TABLE); - for (ch=&m->symstrs[1],nstrs=0; ch<&m->symstrs[sizeofstrs]; ch++) + for (ch=&m->symstrs[1],nstrs=0; ch<cap; ch++) { + if (!ch[0] && !ch[-1] && (nstrs < nsyms)) + return SLBT_CUSTOM_ERROR( + dctx, + SLBT_ERR_AR_INVALID_ARMAP_STRING_TABLE); + if (!ch[0] && ch[-1]) nstrs++; + } if (nstrs != nsyms) return SLBT_CUSTOM_ERROR( dctx, SLBT_ERR_AR_INVALID_ARMAP_STRING_TABLE); + if (cap[-1]) + return SLBT_CUSTOM_ERROR( + dctx, + SLBT_ERR_AR_INVALID_ARMAP_STRING_TABLE); + if (!(m->symstrv = calloc(nsyms + 1,sizeof(const char *)))) return SLBT_SYSTEM_ERROR(dctx,0); |