Vulnerabilities > CVE-2014-1950 - Resource Management Errors vulnerability in XEN
Attack vector
LOCAL Attack complexity
LOW Privileges required
NONE Confidentiality impact
PARTIAL Integrity impact
PARTIAL Availability impact
PARTIAL Summary
Use-after-free vulnerability in the xc_cpupool_getinfo function in Xen 4.1.x through 4.3.x, when using a multithreaded toolstack, does not properly handle a failure by the xc_cpumap_alloc function, which allows local users with access to management functions to cause a denial of service (heap corruption) and possibly gain privileges via unspecified vectors.
Vulnerable Configurations
| Part | Description | Count |
|---|---|---|
| OS | 12 |
Common Weakness Enumeration (CWE)
Nessus
NASL family SuSE Local Security Checks NASL id SUSE_SU-2014-0372-1.NASL description The SUSE Linux Enterprise Server 11 Service Pack 2 LTSS Xen hypervisor and toolset has been updated to fix various security issues and several bugs. The following security issues have been addressed : XSA-88: CVE-2014-1950: Use-after-free vulnerability in the xc_cpupool_getinfo function in Xen 4.1.x through 4.3.x, when using a multithreaded toolstack, does not properly handle a failure by the xc_cpumap_alloc function, which allows local users with access to management functions to cause a denial of service (heap corruption) and possibly gain privileges via unspecified vectors. (bnc#861256) XSA-87: CVE-2014-1666: The do_physdev_op function in Xen 4.1.5, 4.1.6.1, 4.2.2 through 4.2.3, and 4.3.x does not properly restrict access to the (1) PHYSDEVOP_prepare_msix and (2) PHYSDEVOP_release_msix operations, which allows local PV guests to cause a denial of service (host or guest malfunction) or possibly gain privileges via unspecified vectors. (bnc#860302) XSA-84: CVE-2014-1894: Xen 3.2 (and presumably earlier) exhibit both problems with the overflow issue being present for more than just the suboperations listed above. (bnc#860163) XSA-84: CVE-2014-1892 CVE-2014-1893: Xen 3.3 through 4.1, while not affected by the above overflow, have a different overflow issue on FLASK_{GET,SET}BOOL and expose unreasonably large memory allocation to arbitrary guests. (bnc#860163) XSA-84: CVE-2014-1891: The FLASK_{GET,SET}BOOL, FLASK_USER and FLASK_CONTEXT_TO_SID suboperations of the flask hypercall are vulnerable to an integer overflow on the input size. The hypercalls attempt to allocate a buffer which is 1 larger than this size and is therefore vulnerable to integer overflow and an attempt to allocate then access a zero byte buffer. (bnc#860163) XSA-82: CVE-2013-6885: The microcode on AMD 16h 00h through 0Fh processors does not properly handle the interaction between locked instructions and write-combined memory types, which allows local users to cause a denial of service (system hang) via a crafted application, aka the errata 793 issue. (bnc#853049) XSA-76: CVE-2013-4554: Xen 3.0.3 through 4.1.x (possibly 4.1.6.1), 4.2.x (possibly 4.2.3), and 4.3.x (possibly 4.3.1) does not properly prevent access to hypercalls, which allows local guest users to gain privileges via a crafted application running in ring 1 or 2. (bnc#849668) XSA-74: CVE-2013-4553: The XEN_DOMCTL_getmemlist hypercall in Xen 3.4.x through 4.3.x (possibly 4.3.1) does not always obtain the page_alloc_lock and mm_rwlock in the same order, which allows local guest administrators to cause a denial of service (host deadlock). (bnc#849667) XSA-60: CVE-2013-2212: The vmx_set_uc_mode function in Xen 3.3 through 4.3, when disabling chaches, allows local HVM guests with access to memory mapped I/O regions to cause a denial of service (CPU consumption and possibly hypervisor or guest kernel panic) via a crafted GFN range. (bnc#831120) Also the following non-security bugs have been fixed : - Boot Failure with xen kernel in UEFI mode with error last seen 2020-06-05 modified 2015-05-20 plugin id 83613 published 2015-05-20 reporter This script is Copyright (C) 2015-2020 Tenable Network Security, Inc. source https://www.tenable.com/plugins/nessus/83613 title SUSE SLES11 Security Update : Xen (SUSE-SU-2014:0372-1) NASL family SuSE Local Security Checks NASL id OPENSUSE-2014-271.NASL description Xen was updated to fix various bugs and security issues : Update to Xen version 4.2.4 c/s 26280. - bnc#861256 - CVE-2014-1950: xen: XSA-88: use-after-free in xc_cpupool_getinfo() under memory pressure. (fix included with update) - bnc#863297: xend/pvscsi: recognize also SCSI CDROM devices - bnc#858496 - CVE-2014-1642: Xen: XSA-83: Out-of-memory condition yielding memory corruption during IRQ setup - bnc#860163 - xen: XSA-84: integer overflow in several XSM/Flask hypercalls (CVE-2014-1891 CVE-2014-1892 CVE-2014-1893 CVE-2014-1894) - bnc#860165 - CVE-2014-1895: xen: XSA-85: Off-by-one error in FLASK_AVC_CACHESTAT hypercall - bnc#860300 - CVE-2014-1896: xen: XSA-86: libvchan failure handling malicious ring indexes - bnc#860302 - CVE-2014-1666: xen: XSA-87: PHYSDEVOP_(prepare,release)_msix exposed to unprivileged guests - bnc#858311 - Server is not booting in kernel XEN after latest updates - (XEN) setup 0000:00:18.0 for d0 failed (-19) - bnc#858496 - CVE-2014-1642: Xen: XSA-83: Out-of-memory condition yielding memory corruption during IRQ setup - bnc#853049 - CVE-2013-6885: xen: XSA-82: Guest triggerable AMD CPU erratum may cause host hang - bnc#853048 - CVE-2013-6400: xen: XSA-80: IOMMU TLB flushing may be inadvertently suppressed - bnc#831120 - CVE-2013-2212: xen: XSA-60: Excessive time to disable caching with HVM guests with PCI passthrough - bnc#848014 - [HP HPS] Xen hypervisor panics on 8-blades nPar with 46-bit memory addressing - bnc#833251 - [HP BCS SLES11 Bug]: In HPs UEFI x86_64 platform and with xen environment, in booting stage ,xen hypervisor will panic. - pygrub: Support (/dev/xvda) style disk specifications - bnc#849667 - CVE-2014-1895: xen: XSA-74: Lock order reversal between page_alloc_lock and mm_rwlock - bnc#849668 - CVE-2013-4554: xen: XSA-76: Hypercalls exposed to privilege rings 1 and 2 of HVM guests - bnc#842417 - In HPs UEFI x86_64 platform and sles11sp3 with xen environment, dom0 will soft lockup on multiple blades nPar. - bnc#848014 - [HP HPS] Xen hypervisor panics on 8-blades nPar with 46-bit memory addressing - bnc#846849 - Soft lockup with PCI passthrough and many VCPUs - bnc#833483 - Boot Failure with xen kernel in UEFI mode with error last seen 2020-06-05 modified 2014-06-13 plugin id 75312 published 2014-06-13 reporter This script is Copyright (C) 2014-2020 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/75312 title openSUSE Security Update : xen (openSUSE-SU-2014:0483-1) NASL family SuSE Local Security Checks NASL id SUSE_11_XEN-201402-140227.NASL description The SUSE Linux Enterprise Server 11 Service Pack 3 Xen hypervisor and toolset has been updated to 4.2.4 to fix various bugs and security issues : The following security issues have been addressed : - XSA-60: CVE-2013-2212: The vmx_set_uc_mode function in Xen 3.3 through 4.3, when disabling chaches, allows local HVM guests with access to memory mapped I/O regions to cause a denial of service (CPU consumption and possibly hypervisor or guest kernel panic) via a crafted GFN range. (bnc#831120) - XSA-80: CVE-2013-6400: Xen 4.2.x and 4.3.x, when using Intel VT-d and a PCI device has been assigned, does not clear the flag that suppresses IOMMU TLB flushes when unspecified errors occur, which causes the TLB entries to not be flushed and allows local guest administrators to cause a denial of service (host crash) or gain privileges via unspecified vectors. (bnc#853048) - XSA-82: CVE-2013-6885: The microcode on AMD 16h 00h through 0Fh processors does not properly handle the interaction between locked instructions and write-combined memory types, which allows local users to cause a denial of service (system hang) via a crafted application, aka the errata 793 issue. (bnc#853049) - XSA-83: CVE-2014-1642: The IRQ setup in Xen 4.2.x and 4.3.x, when using device passthrough and configured to support a large number of CPUs, frees certain memory that may still be intended for use, which allows local guest administrators to cause a denial of service (memory corruption and hypervisor crash) and possibly execute arbitrary code via vectors related to an out-of-memory error that triggers a (1) use-after-free or (2) double free. (bnc#860092) - XSA-84: CVE-2014-1891: The FLASK_{GET,SET}BOOL, FLASK_USER and FLASK_CONTEXT_TO_SID suboperations of the flask hypercall are vulnerable to an integer overflow on the input size. The hypercalls attempt to allocate a buffer which is 1 larger than this size and is therefore vulnerable to integer overflow and an attempt to allocate then access a zero byte buffer. (bnc#860163) - XSA-84: CVE-2014-1892 / CVE-2014-1893: Xen 3.3 through 4.1, while not affected by the above overflow, have a different overflow issue on FLASK_{GET,SET}BOOL and expose unreasonably large memory allocation to aribitrary guests. (bnc#860163) - XSA-84: CVE-2014-1894: Xen 3.2 (and presumably earlier) exhibit both problems with the overflow issue being present for more than just the suboperations listed above. (bnc#860163) - XSA-85: CVE-2014-1895: The FLASK_AVC_CACHESTAT hypercall, which provides access to per-cpu statistics on the Flask security policy, incorrectly validates the CPU for which statistics are being requested. (bnc#860165) - XSA-86: CVE-2014-1896: libvchan (a library for inter-domain communication) does not correctly handle unusual or malicious contents in the xenstore ring. A malicious guest can exploit this to cause a libvchan-using facility to read or write past the end of the ring. (bnc#860300) - XSA-87: CVE-2014-1666: The do_physdev_op function in Xen 4.1.5, 4.1.6.1, 4.2.2 through 4.2.3, and 4.3.x does not properly restrict access to the (1) PHYSDEVOP_prepare_msix and (2) PHYSDEVOP_release_msix operations, which allows local PV guests to cause a denial of service (host or guest malfunction) or possibly gain privileges via unspecified vectors. (bnc#860302) - XSA-88: CVE-2014-1950: Use-after-free vulnerability in the xc_cpupool_getinfo function in Xen 4.1.x through 4.3.x, when using a multithreaded toolstack, does not properly handle a failure by the xc_cpumap_alloc function, which allows local users with access to management functions to cause a denial of service (heap corruption) and possibly gain privileges via unspecified vectors. (bnc#861256) Also the following non-security bugs have been fixed : - Fixed boot problems with Xen kernel. last seen 2020-06-05 modified 2014-03-14 plugin id 73015 published 2014-03-14 reporter This script is Copyright (C) 2014-2020 Tenable Network Security, Inc. source https://www.tenable.com/plugins/nessus/73015 title SuSE 11.3 Security Update : Xen (SAT Patch Number 8973) NASL family OracleVM Local Security Checks NASL id ORACLEVM_OVMSA-2015-0068.NASL description The remote OracleVM system is missing necessary patches to address critical security updates : please see Oracle VM Security Advisory OVMSA-2015-0068 for details. last seen 2020-06-01 modified 2020-06-02 plugin id 84140 published 2015-06-12 reporter This script is Copyright (C) 2015-2019 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/84140 title OracleVM 3.2 : xen (OVMSA-2015-0068) (POODLE) (Venom) NASL family Fedora Local Security Checks NASL id FEDORA_2014-2802.NASL description update to xen-4.3.2 (includes fix for last seen 2020-03-17 modified 2014-03-03 plugin id 72765 published 2014-03-03 reporter This script is Copyright (C) 2014-2020 Tenable Network Security, Inc. source https://www.tenable.com/plugins/nessus/72765 title Fedora 20 : xen-4.3.2-1.fc20 (2014-2802) NASL family Debian Local Security Checks NASL id DEBIAN_DSA-3006.NASL description Multiple security issues have been discovered in the Xen virtualisation solution which may result in information leaks or denial of service. last seen 2020-03-17 modified 2014-08-19 plugin id 77240 published 2014-08-19 reporter This script is Copyright (C) 2014-2020 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/77240 title Debian DSA-3006-1 : xen - security update NASL family Fedora Local Security Checks NASL id FEDORA_2014-2862.NASL description 32-bit fix for last seen 2020-03-17 modified 2014-03-03 plugin id 72766 published 2014-03-03 reporter This script is Copyright (C) 2014-2020 Tenable Network Security, Inc. source https://www.tenable.com/plugins/nessus/72766 title Fedora 19 : xen-4.2.4-2.fc19 (2014-2862)