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"url": "https://www.exploit-db.com/exploits/28718/"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "https://www.exploit-db.com/exploits/46508/"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "https://www.illumos.org/issues/2873"}], "sourceIdentifier": "security@debian.org", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-119"}], "source": "nvd@nist.gov", "type": "Primary"}]}

{"acknowledgement": "Red Hat would like to thank Xen project for reporting this issue. Upstream acknowledges Rafal Wojtczuk as the original reporter.", "affected_release": [{"advisory": "RHSA-2012:0721", "cpe": "cpe:/o:redhat:enterprise_linux:5", "package": "kernel-0:2.6.18-308.8.2.el5", "product_name": "Red Hat Enterprise Linux 5", "release_date": "2012-06-12T00:00:00Z"}, {"advisory": "RHSA-2012:0720", "cpe": "cpe:/o:redhat:rhel_eus:5.6", "package": "kernel-0:2.6.18-238.39.1.el5", "product_name": "Red Hat Enterprise Linux 5.6 EUS - Server Only", "release_date": "2012-06-12T00:00:00Z"}], "bugzilla": {"description": "kernel: x86-64: avoid sysret to non-canonical address", "id": "813428", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=813428"}, "csaw": false, "cvss": {"cvss_base_score": "7.9", "cvss_scoring_vector": "AV:A/AC:M/Au:N/C:C/I:C/A:C", "status": "verified"}, "details": ["The x86-64 kernel system-call functionality in Xen 4.1.2 and earlier, as used in Citrix XenServer 6.0.2 and earlier and other products; Oracle Solaris 11 and earlier; illumos before r13724; Joyent SmartOS before 20120614T184600Z; FreeBSD before 9.0-RELEASE-p3; NetBSD 6.0 Beta and earlier; Microsoft Windows Server 2008 R2 and R2 SP1 and Windows 7 Gold and SP1; and possibly other operating systems, when running on an Intel processor, incorrectly uses the sysret path in cases where a certain address is not a canonical address, which allows local users to gain privileges via a crafted application. NOTE: because this issue is due to incorrect use of the Intel specification, it should have been split into separate identifiers; however, there was some value in preserving the original mapping of the multi-codebase coordinated-disclosure effort to a single identifier.", "It was found that the Xen hypervisor implementation as shipped with Red Hat Enterprise Linux 5 did not properly restrict the syscall return addresses in the sysret return path to canonical addresses. An unprivileged user in a 64-bit para-virtualized guest, that is running on a 64-bit host that has an Intel CPU, could use this flaw to crash the host or, potentially, escalate their privileges, allowing them to execute arbitrary code at the hypervisor level."], "name": "CVE-2012-0217", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:5", "fix_state": "Affected", "package_name": "kernel-xen", "product_name": "Red Hat Enterprise Linux 5"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/a:redhat:enterprise_mrg:2", "fix_state": "Not affected", "package_name": "realtime-kernel", "product_name": "Red Hat Enterprise MRG 2"}], "public_date": "2012-06-12T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2012-0217\nhttps://nvd.nist.gov/vuln/detail/CVE-2012-0217"], "statement": "This issue did not affect the versions of the Linux kernel as shipped with Red Hat Enterprise Linux 5 and 6, and Red Hat Enterprise MRG, as those versions have a guard page between the end of the user-mode accessible virtual address space and the beginning of the non-canonical area due to CVE-2005-1764 fix, and hardened system call handler due to CVE-2006-0744 fix.\nThis issue did affect the versions of Xen hypervisor as shipped with Red Hat Enterprise Linux 5. A kernel-xen update for Red Hat Enterprise Linux 5 is available to address this flaw.", "threat_severity": "Important"}