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openSUSE:12.2
vte2
vte-CVE-2012-2738.patch
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File vte-CVE-2012-2738.patch of Package vte2
From feeee4b5832b17641e505b7083e0d299fdae318e Mon Sep 17 00:00:00 2001 From: Christian Persch <chpe@gnome.org> Date: Sat, 19 May 2012 17:36:09 +0000 Subject: emulation: Limit integer arguments to 65535 To guard against malicious sequences containing excessively big numbers, limit all parsed numbers to 16 bit range. Doing this here in the parsing routine is a catch-all guard; this doesn't preclude enforcing more stringent limits in the handlers themselves. https://bugzilla.gnome.org/show_bug.cgi?id=676090 --- diff --git a/src/table.c b/src/table.c index 140e8c8..85cf631 100644 --- a/src/table.c +++ b/src/table.c @@ -550,7 +550,7 @@ _vte_table_extract_numbers(GValueArray **array, if (G_UNLIKELY (*array == NULL)) { *array = g_value_array_new(1); } - g_value_set_long(&value, total); + g_value_set_long(&value, CLAMP (total, 0, G_MAXUSHORT)); g_value_array_append(*array, &value); } while (i++ < arginfo->length); g_value_unset(&value); diff --git a/src/vteseq.c b/src/vteseq.c index 457c06a..46def5b 100644 --- a/src/vteseq.c +++ b/src/vteseq.c @@ -557,7 +557,7 @@ vte_sequence_handler_multiple(VteTerminal *terminal, GValueArray *params, VteTerminalSequenceHandler handler) { - vte_sequence_handler_multiple_limited(terminal, params, handler, G_MAXLONG); + vte_sequence_handler_multiple_limited(terminal, params, handler, G_MAXUSHORT); } static void -- cgit v0.9.0.2 From 98ce2f265f986fb88c38d508286bb5e3716b9e74 Mon Sep 17 00:00:00 2001 From: Christian Persch <chpe@gnome.org> Date: Sat, 19 May 2012 18:04:12 +0000 Subject: emulation: Limit repetitions Don't allow malicious sequences to cause excessive repetitions. https://bugzilla.gnome.org/show_bug.cgi?id=676090 --- diff --git a/src/vteseq.c b/src/vteseq.c index 46def5b..7fb4707 100644 --- a/src/vteseq.c +++ b/src/vteseq.c @@ -1397,7 +1397,7 @@ vte_sequence_handler_dc (VteTerminal *terminal, GValueArray *params) static void vte_sequence_handler_DC (VteTerminal *terminal, GValueArray *params) { - vte_sequence_handler_multiple(terminal, params, vte_sequence_handler_dc); + vte_sequence_handler_multiple_r(terminal, params, vte_sequence_handler_dc); } /* Delete a line at the current cursor position. */ @@ -1790,7 +1790,7 @@ vte_sequence_handler_reverse_index (VteTerminal *terminal, GValueArray *params) static void vte_sequence_handler_RI (VteTerminal *terminal, GValueArray *params) { - vte_sequence_handler_multiple(terminal, params, vte_sequence_handler_nd); + vte_sequence_handler_multiple_r(terminal, params, vte_sequence_handler_nd); } /* Save cursor (position). */ @@ -2782,8 +2782,7 @@ vte_sequence_handler_insert_lines (VteTerminal *terminal, GValueArray *params) { GValue *value; VteScreen *screen; - long param, end, row; - int i; + long param, end, row, i, limit; screen = terminal->pvt->screen; /* The default is one. */ param = 1; @@ -2801,7 +2800,13 @@ vte_sequence_handler_insert_lines (VteTerminal *terminal, GValueArray *params) } else { end = screen->insert_delta + terminal->row_count - 1; } - /* Insert the new lines at the cursor. */ + + /* Only allow to insert as many lines as there are between this row + * and the end of the scrolling region. See bug #676090. + */ + limit = end - row + 1; + param = MIN (param, limit); + for (i = 0; i < param; i++) { /* Clear a line off the end of the region and add one to the * top of the region. */ @@ -2822,8 +2827,7 @@ vte_sequence_handler_delete_lines (VteTerminal *terminal, GValueArray *params) { GValue *value; VteScreen *screen; - long param, end, row; - int i; + long param, end, row, i, limit; screen = terminal->pvt->screen; /* The default is one. */ @@ -2842,6 +2846,13 @@ vte_sequence_handler_delete_lines (VteTerminal *terminal, GValueArray *params) } else { end = screen->insert_delta + terminal->row_count - 1; } + + /* Only allow to delete as many lines as there are between this row + * and the end of the scrolling region. See bug #676090. + */ + limit = end - row + 1; + param = MIN (param, limit); + /* Clear them from below the current cursor. */ for (i = 0; i < param; i++) { /* Insert a line at the end of the region and remove one from -- cgit v0.9.0.2
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