mirror of
https://git.in.rschanz.org/ryan77627/guix.git
synced 2024-11-14 19:05:10 -05:00
6a7bd25bf2
* gnu/packages/patches/qemu-CVE-2017-14167.patch gnu/packages/patches/qemu-CVE-2017-13711.patch: New files. * gnu/local.mk (dist_patch_DATA): Add them. * gnu/packages/virtualization.scm (qemu)[source]: Use them.
69 lines
2.3 KiB
Diff
69 lines
2.3 KiB
Diff
Fix CVE-2017-14167:
|
|
|
|
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2017-14167
|
|
http://seclists.org/oss-sec/2017/q3/407
|
|
|
|
Patch copied from upstream development mailing list:
|
|
|
|
https://lists.nongnu.org/archive/html/qemu-devel/2017-09/msg01483.html
|
|
|
|
From: Prasad J Pandit <address@hidden>
|
|
|
|
While loading kernel via multiboot-v1 image, (flags & 0x00010000)
|
|
indicates that multiboot header contains valid addresses to load
|
|
the kernel image. These addresses are used to compute kernel
|
|
size and kernel text offset in the OS image. Validate these
|
|
address values to avoid an OOB access issue.
|
|
|
|
This is CVE-2017-14167.
|
|
|
|
Reported-by: Thomas Garnier <address@hidden>
|
|
Signed-off-by: Prasad J Pandit <address@hidden>
|
|
---
|
|
hw/i386/multiboot.c | 19 +++++++++++++++++++
|
|
1 file changed, 19 insertions(+)
|
|
|
|
Update: add CVE-ID to the commit message.
|
|
|
|
diff --git a/hw/i386/multiboot.c b/hw/i386/multiboot.c
|
|
index 6001f4caa2..c7b70c91d5 100644
|
|
--- a/hw/i386/multiboot.c
|
|
+++ b/hw/i386/multiboot.c
|
|
@@ -221,15 +221,34 @@ int load_multiboot(FWCfgState *fw_cfg,
|
|
uint32_t mh_header_addr = ldl_p(header+i+12);
|
|
uint32_t mh_load_end_addr = ldl_p(header+i+20);
|
|
uint32_t mh_bss_end_addr = ldl_p(header+i+24);
|
|
+
|
|
mh_load_addr = ldl_p(header+i+16);
|
|
+ if (mh_header_addr < mh_load_addr) {
|
|
+ fprintf(stderr, "invalid mh_load_addr address\n");
|
|
+ exit(1);
|
|
+ }
|
|
+
|
|
uint32_t mb_kernel_text_offset = i - (mh_header_addr - mh_load_addr);
|
|
uint32_t mb_load_size = 0;
|
|
mh_entry_addr = ldl_p(header+i+28);
|
|
|
|
if (mh_load_end_addr) {
|
|
+ if (mh_bss_end_addr < mh_load_addr) {
|
|
+ fprintf(stderr, "invalid mh_bss_end_addr address\n");
|
|
+ exit(1);
|
|
+ }
|
|
mb_kernel_size = mh_bss_end_addr - mh_load_addr;
|
|
+
|
|
+ if (mh_load_end_addr < mh_load_addr) {
|
|
+ fprintf(stderr, "invalid mh_load_end_addr address\n");
|
|
+ exit(1);
|
|
+ }
|
|
mb_load_size = mh_load_end_addr - mh_load_addr;
|
|
} else {
|
|
+ if (kernel_file_size < mb_kernel_text_offset) {
|
|
+ fprintf(stderr, "invalid kernel_file_size\n");
|
|
+ exit(1);
|
|
+ }
|
|
mb_kernel_size = kernel_file_size - mb_kernel_text_offset;
|
|
mb_load_size = mb_kernel_size;
|
|
}
|
|
--
|
|
2.13.5
|
|
|