diff options
| author | Wen Huang <huangwenabc@gmail.com> | 2019-08-28 10:07:51 +0800 |
|---|---|---|
| committer | Kalle Valo <kvalo@codeaurora.org> | 2019-09-03 16:50:21 +0300 |
| commit | 7caac62ed598a196d6ddf8d9c121e12e082cac3a (patch) | |
| tree | 926f8c0a3bb5c8cff8ee3a1d5d8a4a85e94e853b /drivers | |
| parent | 70702265a04aa0ce5a7bde77d13456209992b32f (diff) | |
mwifiex: Fix three heap overflow at parsing element in cfg80211_ap_settings
mwifiex_update_vs_ie(),mwifiex_set_uap_rates() and
mwifiex_set_wmm_params() call memcpy() without checking
the destination size.Since the source is given from
user-space, this may trigger a heap buffer overflow.
Fix them by putting the length check before performing memcpy().
This fix addresses CVE-2019-14814,CVE-2019-14815,CVE-2019-14816.
Signed-off-by: Wen Huang <huangwenabc@gmail.com>
Acked-by: Ganapathi Bhat <gbhat@marvell.comg>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/net/wireless/marvell/mwifiex/ie.c | 3 | ||||
| -rw-r--r-- | drivers/net/wireless/marvell/mwifiex/uap_cmd.c | 9 |
2 files changed, 11 insertions, 1 deletions
diff --git a/drivers/net/wireless/marvell/mwifiex/ie.c b/drivers/net/wireless/marvell/mwifiex/ie.c index 653d347a9a19..580387f9f12a 100644 --- a/drivers/net/wireless/marvell/mwifiex/ie.c +++ b/drivers/net/wireless/marvell/mwifiex/ie.c @@ -241,6 +241,9 @@ static int mwifiex_update_vs_ie(const u8 *ies, int ies_len, } vs_ie = (struct ieee_types_header *)vendor_ie; + if (le16_to_cpu(ie->ie_length) + vs_ie->len + 2 > + IEEE_MAX_IE_SIZE) + return -EINVAL; memcpy(ie->ie_buffer + le16_to_cpu(ie->ie_length), vs_ie, vs_ie->len + 2); le16_unaligned_add_cpu(&ie->ie_length, vs_ie->len + 2); diff --git a/drivers/net/wireless/marvell/mwifiex/uap_cmd.c b/drivers/net/wireless/marvell/mwifiex/uap_cmd.c index 18f7d9bf30b2..0939a8c8f3ab 100644 --- a/drivers/net/wireless/marvell/mwifiex/uap_cmd.c +++ b/drivers/net/wireless/marvell/mwifiex/uap_cmd.c @@ -265,6 +265,8 @@ mwifiex_set_uap_rates(struct mwifiex_uap_bss_param *bss_cfg, rate_ie = (void *)cfg80211_find_ie(WLAN_EID_SUPP_RATES, var_pos, len); if (rate_ie) { + if (rate_ie->len > MWIFIEX_SUPPORTED_RATES) + return; memcpy(bss_cfg->rates, rate_ie + 1, rate_ie->len); rate_len = rate_ie->len; } @@ -272,8 +274,11 @@ mwifiex_set_uap_rates(struct mwifiex_uap_bss_param *bss_cfg, rate_ie = (void *)cfg80211_find_ie(WLAN_EID_EXT_SUPP_RATES, params->beacon.tail, params->beacon.tail_len); - if (rate_ie) + if (rate_ie) { + if (rate_ie->len > MWIFIEX_SUPPORTED_RATES - rate_len) + return; memcpy(bss_cfg->rates + rate_len, rate_ie + 1, rate_ie->len); + } return; } @@ -391,6 +396,8 @@ mwifiex_set_wmm_params(struct mwifiex_private *priv, params->beacon.tail_len); if (vendor_ie) { wmm_ie = vendor_ie; + if (*(wmm_ie + 1) > sizeof(struct mwifiex_types_wmm_info)) + return; memcpy(&bss_cfg->wmm_info, wmm_ie + sizeof(struct ieee_types_header), *(wmm_ie + 1)); priv->wmm_enabled = 1; |