diff options
Diffstat (limited to 'gnu/packages/patches/qemu-CVE-2015-8619.patch')
| -rw-r--r-- | gnu/packages/patches/qemu-CVE-2015-8619.patch | 119 |
1 files changed, 119 insertions, 0 deletions
diff --git a/gnu/packages/patches/qemu-CVE-2015-8619.patch b/gnu/packages/patches/qemu-CVE-2015-8619.patch new file mode 100644 index 0000000000..5961343d1e --- /dev/null +++ b/gnu/packages/patches/qemu-CVE-2015-8619.patch @@ -0,0 +1,119 @@ +From: Wolfgang Bumiller <w.bumiller@proxmox.com> +Date: Wed, 13 Jan 2016 09:09:58 +0100 +Subject: [PATCH] hmp: fix sendkey out of bounds write (CVE-2015-8619) + +When processing 'sendkey' command, hmp_sendkey routine null +terminates the 'keyname_buf' array. This results in an OOB +write issue, if 'keyname_len' was to fall outside of +'keyname_buf' array. + +Since the keyname's length is known the keyname_buf can be +removed altogether by adding a length parameter to +index_from_key() and using it for the error output as well. + +Reported-by: Ling Liu <liuling-it@360.cn> +Signed-off-by: Wolfgang Bumiller <w.bumiller@proxmox.com> +Message-Id: <20160113080958.GA18934@olga> +[Comparison with "<" dumbed down, test for junk after strtoul() +tweaked] +Signed-off-by: Markus Armbruster <armbru@redhat.com> + +(cherry picked from commit 64ffbe04eaafebf4045a3ace52a360c14959d196) +--- + hmp.c | 18 ++++++++---------- + include/ui/console.h | 2 +- + ui/input-legacy.c | 5 +++-- + 3 files changed, 12 insertions(+), 13 deletions(-) + +diff --git a/hmp.c b/hmp.c +index 2140605..1904203 100644 +--- a/hmp.c ++++ b/hmp.c +@@ -1734,21 +1734,18 @@ void hmp_sendkey(Monitor *mon, const QDict *qdict) + int has_hold_time = qdict_haskey(qdict, "hold-time"); + int hold_time = qdict_get_try_int(qdict, "hold-time", -1); + Error *err = NULL; +- char keyname_buf[16]; + char *separator; + int keyname_len; + + while (1) { + separator = strchr(keys, '-'); + keyname_len = separator ? separator - keys : strlen(keys); +- pstrcpy(keyname_buf, sizeof(keyname_buf), keys); + + /* Be compatible with old interface, convert user inputted "<" */ +- if (!strncmp(keyname_buf, "<", 1) && keyname_len == 1) { +- pstrcpy(keyname_buf, sizeof(keyname_buf), "less"); ++ if (keys[0] == '<' && keyname_len == 1) { ++ keys = "less"; + keyname_len = 4; + } +- keyname_buf[keyname_len] = 0; + + keylist = g_malloc0(sizeof(*keylist)); + keylist->value = g_malloc0(sizeof(*keylist->value)); +@@ -1761,16 +1758,17 @@ void hmp_sendkey(Monitor *mon, const QDict *qdict) + } + tmp = keylist; + +- if (strstart(keyname_buf, "0x", NULL)) { ++ if (strstart(keys, "0x", NULL)) { + char *endp; +- int value = strtoul(keyname_buf, &endp, 0); +- if (*endp != '\0') { ++ int value = strtoul(keys, &endp, 0); ++ assert(endp <= keys + keyname_len); ++ if (endp != keys + keyname_len) { + goto err_out; + } + keylist->value->type = KEY_VALUE_KIND_NUMBER; + keylist->value->u.number = value; + } else { +- int idx = index_from_key(keyname_buf); ++ int idx = index_from_key(keys, keyname_len); + if (idx == Q_KEY_CODE_MAX) { + goto err_out; + } +@@ -1792,7 +1790,7 @@ out: + return; + + err_out: +- monitor_printf(mon, "invalid parameter: %s\n", keyname_buf); ++ monitor_printf(mon, "invalid parameter: %.*s\n", keyname_len, keys); + goto out; + } + +diff --git a/include/ui/console.h b/include/ui/console.h +index c249db4..5739bdd 100644 +--- a/include/ui/console.h ++++ b/include/ui/console.h +@@ -433,7 +433,7 @@ static inline int vnc_display_pw_expire(const char *id, time_t expires) + void curses_display_init(DisplayState *ds, int full_screen); + + /* input.c */ +-int index_from_key(const char *key); ++int index_from_key(const char *key, size_t key_length); + + /* gtk.c */ + void early_gtk_display_init(int opengl); +diff --git a/ui/input-legacy.c b/ui/input-legacy.c +index e0a39f0..3f28bbc 100644 +--- a/ui/input-legacy.c ++++ b/ui/input-legacy.c +@@ -57,12 +57,13 @@ struct QEMUPutLEDEntry { + static QTAILQ_HEAD(, QEMUPutLEDEntry) led_handlers = + QTAILQ_HEAD_INITIALIZER(led_handlers); + +-int index_from_key(const char *key) ++int index_from_key(const char *key, size_t key_length) + { + int i; + + for (i = 0; QKeyCode_lookup[i] != NULL; i++) { +- if (!strcmp(key, QKeyCode_lookup[i])) { ++ if (!strncmp(key, QKeyCode_lookup[i], key_length) && ++ !QKeyCode_lookup[i][key_length]) { + break; + } + } |