From 7caae7d7102364fa81e0a06223d1fbb0217ec026 Mon Sep 17 00:00:00 2001 From: CVE Team Date: Thu, 30 Nov 2017 17:05:12 -0500 Subject: [PATCH] - Synchronized data. --- 2017/1000xxx/CVE-2017-1000405.json | 116 ++++++++++++++--------------- 1 file changed, 58 insertions(+), 58 deletions(-) diff --git a/2017/1000xxx/CVE-2017-1000405.json b/2017/1000xxx/CVE-2017-1000405.json index 0e94a63e0f8..fc589bb13f0 100644 --- a/2017/1000xxx/CVE-2017-1000405.json +++ b/2017/1000xxx/CVE-2017-1000405.json @@ -1,62 +1,62 @@ { - "CVE_data_meta": { - "ASSIGNER": "kurt@seifried.org", - "DATE_ASSIGNED": "2017-11-22", - "ID": "CVE-2017-1000405", - "REQUESTER": "contact@bindecy.com", - "STATE": "PUBLIC" - }, - "affects": { - "vendor": { - "vendor_data": [ - { - "product": { - "product_data": [ - { - "product_name": "Linux Kernel", - "version": { - "version_data": [ - { - "version_value": "2.6.38 through 4.14" - } + "CVE_data_meta" : { + "ASSIGNER" : "cve-assign@distributedweaknessfiling.org", + "DATE_ASSIGNED" : "2017-11-22", + "ID" : "CVE-2017-1000405", + "REQUESTER" : "contact@bindecy.com", + "STATE" : "PUBLIC" + }, + "affects" : { + "vendor" : { + "vendor_data" : [ + { + "product" : { + "product_data" : [ + { + "product_name" : "Linux Kernel", + "version" : { + "version_data" : [ + { + "version_value" : "2.6.38 through 4.14" + } + ] + } + } ] - } - } - ] - }, - "vendor_name": "Linux Kernel" - } + }, + "vendor_name" : "Linux Kernel" + } + ] + } + }, + "data_format" : "MITRE", + "data_type" : "CVE", + "data_version" : "4.0", + "description" : { + "description_data" : [ + { + "lang" : "eng", + "value" : "The Linux Kernel versions 2.6.38 through 4.14 have a problematic use of pmd_mkdirty() in the touch_pmd() function inside the THP implementation. touch_pmd() can be reached by get_user_pages(). In such case, the pmd will become dirty. This scenario breaks the new can_follow_write_pmd()'s logic - pmd can become dirty without going through a COW cycle. This bug is not as severe as the original \"Dirty cow\" because an ext4 file (or any other regular file) cannot be mapped using THP. Nevertheless, it does allow us to overwrite read-only huge pages. For example, the zero huge page and sealed shmem files can be overwritten (since their mapping can be populated using THP). Note that after the first write page-fault to the zero page, it will be replaced with a new fresh (and zeroed) thp." + } ] - } - }, - "data_format": "MITRE", - "data_type": "CVE", - "data_version": "4.0", - "description": { - "description_data": [ - { - "lang": "eng", - "value": "The Linux Kernel versions 2.6.38 through 4.14 have a problematic use of pmd_mkdirty() in the touch_pmd() function inside the THP implementation. touch_pmd() can be reached by get_user_pages(). In such case, the pmd will become dirty. This scenario breaks the new can_follow_write_pmd()'s logic - pmd can become dirty without going through a COW cycle. This bug is not as severe as the original \"Dirty cow\" because an ext4 file (or any other regular file) cannot be mapped using THP. Nevertheless, it does allow us to overwrite read-only huge pages. For example, the zero huge page and sealed shmem files can be overwritten (since their mapping can be populated using THP). Note that after the first write page-fault to the zero page, it will be replaced with a new fresh (and zeroed) thp." - } - ] - }, - "problemtype": { - "problemtype_data": [ - { - "description": [ - { - "lang": "eng", - "value": "memory overwrite" - } - ] - } - ] - }, - "references": { - "reference_data": [ - { - "url": "https://medium.com/bindecy/huge-dirty-cow-cve-2017-1000405-110eca132de0" - } - ] - } + }, + "problemtype" : { + "problemtype_data" : [ + { + "description" : [ + { + "lang" : "eng", + "value" : "memory overwrite" + } + ] + } + ] + }, + "references" : { + "reference_data" : [ + { + "url" : "https://medium.com/bindecy/huge-dirty-cow-cve-2017-1000405-110eca132de0" + } + ] + } }