diff options
Diffstat (limited to 'gnu/packages/patches/libcaca-CVE-2021-3410-pt1.patch')
| -rw-r--r-- | gnu/packages/patches/libcaca-CVE-2021-3410-pt1.patch | 137 |
1 files changed, 137 insertions, 0 deletions
diff --git a/gnu/packages/patches/libcaca-CVE-2021-3410-pt1.patch b/gnu/packages/patches/libcaca-CVE-2021-3410-pt1.patch new file mode 100644 index 0000000000..b23b01d33a --- /dev/null +++ b/gnu/packages/patches/libcaca-CVE-2021-3410-pt1.patch @@ -0,0 +1,137 @@ +https://github.com/cacalabs/libcaca/commit/46b4ea7cea72d6b3ffe65d33e604b1774dcc2bbd.patch + +From 46b4ea7cea72d6b3ffe65d33e604b1774dcc2bbd Mon Sep 17 00:00:00 2001 +From: Sam Hocevar <sam@hocevar.net> +Date: Fri, 26 Feb 2021 10:55:38 +0100 +Subject: [PATCH] canvas: fix an integer overflow in caca_resize(). + +Fixes: #52 (CVE-2021-3410) +--- + caca/canvas.c | 13 +++++++++++-- + caca/codec/import.c | 1 + + caca/codec/text.c | 21 ++++++++++++++------- + 3 files changed, 26 insertions(+), 9 deletions(-) + +diff --git a/caca/canvas.c b/caca/canvas.c +index 3fdd37ae..d0715392 100644 +--- a/caca/canvas.c ++++ b/caca/canvas.c +@@ -45,6 +45,7 @@ static int caca_resize(caca_canvas_t *, int, int); + * + * If an error occurs, NULL is returned and \b errno is set accordingly: + * - \c EINVAL Specified width or height is invalid. ++ * - \c EOVERFLOW Specified width and height overflowed. + * - \c ENOMEM Not enough memory for the requested canvas size. + * + * \param width The desired canvas width +@@ -200,6 +201,7 @@ int caca_unmanage_canvas(caca_canvas_t *cv, int (*callback)(void *), void *p) + * + * If an error occurs, -1 is returned and \b errno is set accordingly: + * - \c EINVAL Specified width or height is invalid. ++ * - \c EOVERFLOW Specified width and height overflowed. + * - \c EBUSY The canvas is in use by a display driver and cannot be resized. + * - \c ENOMEM Not enough memory for the requested canvas size. If this + * happens, the canvas handle becomes invalid and should not be used. +@@ -363,7 +365,7 @@ int caca_rand(int min, int max) + + int caca_resize(caca_canvas_t *cv, int width, int height) + { +- int x, y, f, old_width, old_height, new_size, old_size; ++ int x, y, f, old_width, old_height, old_size; + + old_width = cv->width; + old_height = cv->height; +@@ -375,7 +377,14 @@ int caca_resize(caca_canvas_t *cv, int width, int height) + * dirty rectangle handling */ + cv->width = width; + cv->height = height; +- new_size = width * height; ++ int new_size = width * height; ++ ++ /* Check for overflow */ ++ if (new_size / width != height) ++ { ++ seterrno(EOVERFLOW); ++ return -1; ++ } + + /* If width or height is smaller (or both), we have the opportunity to + * reduce or even remove dirty rectangles */ +diff --git a/caca/codec/import.c b/caca/codec/import.c +index 8836fd08..2dafe3cf 100644 +--- a/caca/codec/import.c ++++ b/caca/codec/import.c +@@ -61,6 +61,7 @@ static ssize_t import_caca(caca_canvas_t *, void const *, size_t); + * + * If an error occurs, -1 is returned and \b errno is set accordingly: + * - \c ENOMEM Not enough memory to allocate canvas. ++ * - \c EOVERFLOW Importing data caused a value overflow. + * - \c EINVAL Invalid format requested. + * + * \param cv A libcaca canvas in which to import the file. +diff --git a/caca/codec/text.c b/caca/codec/text.c +index 358b7224..94a2a4d7 100644 +--- a/caca/codec/text.c ++++ b/caca/codec/text.c +@@ -46,7 +46,7 @@ ssize_t _import_text(caca_canvas_t *cv, void const *data, size_t size) + char const *text = (char const *)data; + unsigned int width = 0, height = 0, x = 0, y = 0, i; + +- caca_set_canvas_size(cv, width, height); ++ caca_set_canvas_size(cv, 0, 0); + + for(i = 0; i < size; i++) + { +@@ -70,15 +70,19 @@ ssize_t _import_text(caca_canvas_t *cv, void const *data, size_t size) + if(y >= height) + height = y + 1; + +- caca_set_canvas_size(cv, width, height); ++ if (caca_set_canvas_size(cv, width, height) < 0) ++ return -1; + } + + caca_put_char(cv, x, y, ch); + x++; + } + +- if(y > height) +- caca_set_canvas_size(cv, width, height = y); ++ if (y > height) ++ { ++ if (caca_set_canvas_size(cv, width, height = y) < 0) ++ return -1; ++ } + + return (ssize_t)size; + } +@@ -431,7 +435,8 @@ ssize_t _import_ansi(caca_canvas_t *cv, void const *data, size_t size, int utf8) + { + savedattr = caca_get_attr(cv, -1, -1); + caca_set_attr(cv, im.clearattr); +- caca_set_canvas_size(cv, width = x + wch, height); ++ if (caca_set_canvas_size(cv, width = x + wch, height) < 0) ++ return -1; + caca_set_attr(cv, savedattr); + } + else +@@ -448,7 +453,8 @@ ssize_t _import_ansi(caca_canvas_t *cv, void const *data, size_t size, int utf8) + caca_set_attr(cv, im.clearattr); + if(growy) + { +- caca_set_canvas_size(cv, width, height = y + 1); ++ if (caca_set_canvas_size(cv, width, height = y + 1) < 0) ++ return -1; + } + else + { +@@ -480,7 +486,8 @@ ssize_t _import_ansi(caca_canvas_t *cv, void const *data, size_t size, int utf8) + { + savedattr = caca_get_attr(cv, -1, -1); + caca_set_attr(cv, im.clearattr); +- caca_set_canvas_size(cv, width, height = y); ++ if (caca_set_canvas_size(cv, width, height = y)) ++ return -1; + caca_set_attr(cv, savedattr); + } + |