diff options
Diffstat (limited to 'gnu/packages/patches/mupdf-CVE-2016-6265.patch')
| -rw-r--r-- | gnu/packages/patches/mupdf-CVE-2016-6265.patch | 30 |
1 files changed, 30 insertions, 0 deletions
diff --git a/gnu/packages/patches/mupdf-CVE-2016-6265.patch b/gnu/packages/patches/mupdf-CVE-2016-6265.patch new file mode 100644 index 0000000000..58f5c3726c --- /dev/null +++ b/gnu/packages/patches/mupdf-CVE-2016-6265.patch @@ -0,0 +1,30 @@ +Fix CVE-2016-6265 (use after free in pdf_load_xref()). + +https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2016-6265 +https://security-tracker.debian.org/tracker/CVE-2016-6265 + +Patch copied from upstream source repository: + +http://git.ghostscript.com/?p=mupdf.git;h=fa1936405b6a84e5c9bb440912c23d532772f958 + +diff --git a/source/pdf/pdf-xref.c b/source/pdf/pdf-xref.c +index 576c315..3222599 100644 +--- a/source/pdf/pdf-xref.c ++++ b/source/pdf/pdf-xref.c +@@ -1184,8 +1184,14 @@ pdf_load_xref(fz_context *ctx, pdf_document *doc, pdf_lexbuf *buf) + fz_throw(ctx, FZ_ERROR_GENERIC, "object offset out of range: %d (%d 0 R)", (int)entry->ofs, i); + } + if (entry->type == 'o') +- if (entry->ofs <= 0 || entry->ofs >= xref_len || pdf_get_xref_entry(ctx, doc, entry->ofs)->type != 'n') +- fz_throw(ctx, FZ_ERROR_GENERIC, "invalid reference to an objstm that does not exist: %d (%d 0 R)", (int)entry->ofs, i); ++ { ++ /* Read this into a local variable here, because pdf_get_xref_entry ++ * may solidify the xref, hence invalidating "entry", meaning we ++ * need a stashed value for the throw. */ ++ fz_off_t ofs = entry->ofs; ++ if (ofs <= 0 || ofs >= xref_len || pdf_get_xref_entry(ctx, doc, ofs)->type != 'n') ++ fz_throw(ctx, FZ_ERROR_GENERIC, "invalid reference to an objstm that does not exist: %d (%d 0 R)", (int)ofs, i); ++ } + } + } + |