An issue was discovered in Xen 4.5.x through 4.9.x. The function `__gnttab_cache_flush` handles GNTTABOP_cache_flush grant table operations.
위협 신호 · CVSS · EPSS · KEV
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별도 긴급 패치 불필요 — 정기 시스템 업그레이드 주기에 맞춰 조치
CVSS 벡터 · 메트릭
CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H약점 (CWE)
- CWE-476
NULL 포인터 역참조 — NULL 참조로 서비스 충돌(DoS) 유발.
상세 설명
An issue was discovered in Xen 4.5.x through 4.9.x. The function __gnttab_cache_flush handles GNTTABOP_cache_flush grant table operations. It checks to see if the calling domain is the owner of the page that is to be operated on. If it is not, the owner's grant table is checked to see if a grant mapping to the calling domain exists for the page in question. However, the function does not check to see if the owning domain actually has a grant table or not. Some special domains, such as DOMID_XEN, DOMID_IO and DOMID_COW are created without grant tables. Hence, if __gnttab_cache_flush operates on a page owned by these special domains, it will attempt to dereference a NULL pointer in the domain struct.
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영향받는 제품·버전
- xen xenother
- xen xenother
- xen xenother
- xen xenother
- xen xenother
- xen xenother
- xen xenother
- xen xenother
- xen xenother
- xen xenother
- xen xenother
- xen xenother
- xen xenother
- xen xenother
- xen xenother
- xen xenother
- xen xenother
- xen xenother
영향받는 구성 (CPE) 18
- xen xen 4.5.0cpe:2.3:o:xen:xen:4.5.0:*:*:*:*:*:*:*
- xen xen 4.5.1cpe:2.3:o:xen:xen:4.5.1:*:*:*:*:*:*:*
- xen xen 4.5.2cpe:2.3:o:xen:xen:4.5.2:*:*:*:*:*:*:*
- xen xen 4.5.3cpe:2.3:o:xen:xen:4.5.3:*:*:*:*:*:*:*
- xen xen 4.5.5cpe:2.3:o:xen:xen:4.5.5:*:*:*:*:*:*:*
- xen xen 4.6.0cpe:2.3:o:xen:xen:4.6.0:*:*:*:*:*:*:*
- xen xen 4.6.1cpe:2.3:o:xen:xen:4.6.1:*:*:*:*:*:*:*
- xen xen 4.6.3cpe:2.3:o:xen:xen:4.6.3:*:*:*:*:*:*:*
- xen xen 4.6.4cpe:2.3:o:xen:xen:4.6.4:*:*:*:*:*:*:*
- xen xen 4.6.5cpe:2.3:o:xen:xen:4.6.5:*:*:*:*:*:*:*
- xen xen 4.6.6cpe:2.3:o:xen:xen:4.6.6:*:*:*:*:*:*:*
- xen xen 4.7.0cpe:2.3:o:xen:xen:4.7.0:*:*:*:*:*:*:*
- xen xen 4.7.1cpe:2.3:o:xen:xen:4.7.1:*:*:*:*:*:*:*
- xen xen 4.7.2cpe:2.3:o:xen:xen:4.7.2:*:*:*:*:*:*:*
- xen xen 4.7.3cpe:2.3:o:xen:xen:4.7.3:*:*:*:*:*:*:*
- xen xen 4.8.0cpe:2.3:o:xen:xen:4.8.0:*:*:*:*:*:*:*
- xen xen 4.8.1cpe:2.3:o:xen:xen:4.8.1:*:*:*:*:*:*:*
- xen xen 4.9.0cpe:2.3:o:xen:xen:4.9.0:*:*:*:*:*:*:*
참고 자료 5
- http://www.securityfocus.com/bid/100817Third Party AdvisoryVDB Entry
- http://www.securitytracker.com/id/1039349Third Party AdvisoryVDB Entry
- http://xenbits.xen.org/xsa/advisory-232.htmlPatchVendor Advisory
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