diff options
Diffstat (limited to 'debian/patches/954_wtfparse1.patch')
| -rw-r--r-- | debian/patches/954_wtfparse1.patch | 84 |
1 files changed, 84 insertions, 0 deletions
diff --git a/debian/patches/954_wtfparse1.patch b/debian/patches/954_wtfparse1.patch new file mode 100644 index 0000000..62b5e91 --- /dev/null +++ b/debian/patches/954_wtfparse1.patch @@ -0,0 +1,84 @@ +Subject: Prevent overflow beyond the end of string in wtf_parse1() +From: Tatsuya Kinoshita <tats@debian.org> +Bug-Debian: https://github.com/tats/w3m/issues/68 +Origin: https://anonscm.debian.org/cgit/collab-maint/w3m.git/commit/?id=00433f4ac2645ac6236ea1892b4a93f26a039a84 + +--- + libwc/wtf.c | 44 ++++++++++++++++++++++++++++++++------------ + 1 file changed, 32 insertions(+), 12 deletions(-) + +diff --git a/libwc/wtf.c b/libwc/wtf.c +index cdc6cbc..94d95c1 100644 +--- a/libwc/wtf.c ++++ b/libwc/wtf.c +@@ -397,7 +397,7 @@ wtf_parse1(wc_uchar **p) + cc.code = *(q++); + } else if (*q > 0xa0) { + cc.ccs = wtf_gr_ccs; +- if (WC_CCS_IS_WIDE(cc.ccs)) { ++ if (WC_CCS_IS_WIDE(cc.ccs) && *(q+1)) { + cc.code = ((wc_uint32)*q << 8) | *(q+1); + q += 2; + } else +@@ -410,27 +410,47 @@ wtf_parse1(wc_uchar **p) + case WC_CCS_A_CS942: + case WC_CCS_A_PCS: + case WC_CCS_A_UNKNOWN: +- cc.ccs |= *(q++) & 0x7f; +- cc.code = *(q++); ++ if (*q && *(q+1)) { ++ cc.ccs |= *(q++) & 0x7f; ++ cc.code = *(q++); ++ } else { ++ cc.ccs = WC_CCS_US_ASCII; ++ cc.code = (wc_uint32)' '; ++ } + break; + case WC_CCS_A_CS94W: + case WC_CCS_A_CS96W: + case WC_CCS_A_PCSW: +- cc.ccs |= *(q++) & 0x7f; +- cc.code = ((wc_uint32)*q << 8) | *(q+1); +- q += 2; ++ if (*q && *(q+1) && *(q+2)) { ++ cc.ccs |= *(q++) & 0x7f; ++ cc.code = ((wc_uint32)*q << 8) | *(q+1); ++ q += 2; ++ } else { ++ cc.ccs = WC_CCS_US_ASCII; ++ cc.code = (wc_uint32)' '; ++ } + break; + case WC_CCS_A_WCS16: + case WC_CCS_A_WCS16W: +- cc.ccs |= (*q & 0x7c) >> 2; +- cc.code = wtf_to_wcs16(q); +- q += 3; ++ if (*q && *(q+1) && *(q+2)) { ++ cc.ccs |= (*q & 0x7c) >> 2; ++ cc.code = wtf_to_wcs16(q); ++ q += 3; ++ } else { ++ cc.ccs = WC_CCS_US_ASCII; ++ cc.code = (wc_uint32)' '; ++ } + break; + case WC_CCS_A_WCS32: + case WC_CCS_A_WCS32W: +- cc.ccs |= (*q & 0x70) >> 4; +- cc.code = wtf_to_wcs32(q); +- q += 5; ++ if (*q && *(q+1) && *(q+2) && *(q+3) && *(q+4)) { ++ cc.ccs |= (*q & 0x70) >> 4; ++ cc.code = wtf_to_wcs32(q); ++ q += 5; ++ } else { ++ cc.ccs = WC_CCS_US_ASCII; ++ cc.code = (wc_uint32)' '; ++ } + break; + default: + /* case 0: */ +-- +2.10.2 + |