diff options
Diffstat (limited to 'main/busybox/CVE-2019-5747.patch')
| -rw-r--r-- | main/busybox/CVE-2019-5747.patch | 57 |
1 files changed, 57 insertions, 0 deletions
diff --git a/main/busybox/CVE-2019-5747.patch b/main/busybox/CVE-2019-5747.patch new file mode 100644 index 0000000000..f81f02b30c --- /dev/null +++ b/main/busybox/CVE-2019-5747.patch @@ -0,0 +1,57 @@ +From 74d9f1ba37010face4bd1449df4d60dd84450b06 Mon Sep 17 00:00:00 2001 +From: Denys Vlasenko <vda.linux@googlemail.com> +Date: Mon, 7 Jan 2019 15:33:42 +0100 +Subject: udhcpc: when decoding DHCP_SUBNET, ensure it is 4 bytes long + +function old new delta +udhcp_run_script 795 801 +6 + +Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com> +--- + networking/udhcp/common.c | 2 +- + networking/udhcp/common.h | 2 +- + networking/udhcp/dhcpc.c | 2 +- + 3 files changed, 3 insertions(+), 3 deletions(-) + +diff --git a/networking/udhcp/common.c b/networking/udhcp/common.c +index 4c2221b77..fc4de5716 100644 +--- a/networking/udhcp/common.c ++++ b/networking/udhcp/common.c +@@ -302,7 +302,7 @@ uint8_t* FAST_FUNC udhcp_get_option32(struct dhcp_packet *packet, int code) + { + uint8_t *r = udhcp_get_option(packet, code); + if (r) { +- if (r[-1] != 4) ++ if (r[-OPT_DATA + OPT_LEN] != 4) + r = NULL; + } + return r; +diff --git a/networking/udhcp/common.h b/networking/udhcp/common.h +index 9511152ff..62f9a2a4a 100644 +--- a/networking/udhcp/common.h ++++ b/networking/udhcp/common.h +@@ -119,7 +119,7 @@ enum { + //#define DHCP_TIME_SERVER 0x04 /* RFC 868 time server (32-bit, 0 = 1.1.1900) */ + //#define DHCP_NAME_SERVER 0x05 /* IEN 116 _really_ ancient kind of NS */ + //#define DHCP_DNS_SERVER 0x06 +-//#define DHCP_LOG_SERVER 0x07 /* port 704 UDP log (not syslog) ++//#define DHCP_LOG_SERVER 0x07 /* port 704 UDP log (not syslog) */ + //#define DHCP_COOKIE_SERVER 0x08 /* "quote of the day" server */ + //#define DHCP_LPR_SERVER 0x09 + #define DHCP_HOST_NAME 0x0c /* 12: either client informs server or server gives name to client */ +diff --git a/networking/udhcp/dhcpc.c b/networking/udhcp/dhcpc.c +index 5b3fd531c..dcec8cdfd 100644 +--- a/networking/udhcp/dhcpc.c ++++ b/networking/udhcp/dhcpc.c +@@ -531,7 +531,7 @@ static char **fill_envp(struct dhcp_packet *packet) + temp = udhcp_get_option(packet, code); + *curr = xmalloc_optname_optval(temp, &dhcp_optflags[i], opt_name); + putenv(*curr++); +- if (code == DHCP_SUBNET) { ++ if (code == DHCP_SUBNET && temp[-OPT_DATA + OPT_LEN] == 4) { + /* Subnet option: make things like "$ip/$mask" possible */ + uint32_t subnet; + move_from_unaligned32(subnet, temp); +-- +cgit v1.2.1 + |