The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available.

  - Multiple unspecified vulnerabilities in the Elf parser (libelf) in Xen 4.2.x and earlier allow local guest     administrators with certain permissions to have an unspecified impact via a crafted kernel, related to     other problems that are not CVE-2013-2194 or CVE-2013-2195. (CVE-2013-2196)

Note that Nessus relies on the presence of the package as reported by the vendor.

The remote OracleVM system is missing necessary patches to address critical security updates : please see Oracle VM Security Advisory OVMSA-2013-0069 for details.

Revised fixes for [XSA-55]

Note that Tenable Network Security has extracted the preceding description block directly from the Fedora security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

The SUSE Linux Enterprise 10 Service Pack 3 LTSS Xen hypervisor and toolset have been updated to fix various security issues :

The following security issues have been addressed :

XSA-20: CVE-2012-4535: Xen 3.4 through 4.2, and possibly earlier versions, allows local guest OS administrators to cause a denial of service (Xen infinite loop and physical CPU consumption) by setting a VCPU with an 'inappropriate deadline'. (bnc#786516)

XSA-22: CVE-2012-4537: Xen 3.4 through 4.2, and possibly earlier versions, does not properly synchronize the p2m and m2p tables when the set_p2m_entry function fails, which allows local HVM guest OS administrators to cause a denial of service (memory consumption and assertion failure), aka 'Memory mapping failure DoS vulnerability'. (bnc#786517)

XSA-25: CVE-2012-4544: The PV domain builder in Xen 4.2 and earlier does not validate the size of the kernel or ramdisk (1) before or (2) after decompression, which allows local guest administrators to cause a denial of service (domain 0 memory consumption) via a crafted (a) kernel or (b) ramdisk.
(bnc#787163)

XSA-29: CVE-2012-5513: The XENMEM_exchange handler in Xen 4.2 and earlier does not properly check the memory address, which allows local PV guest OS administrators to cause a denial of service (crash) or possibly gain privileges via unspecified vectors that overwrite memory in the hypervisor reserved range. (bnc#789951)

XSA-31: CVE-2012-5515: The (1) XENMEM_decrease_reservation, (2) XENMEM_populate_physmap, and (3) XENMEM_exchange hypercalls in Xen 4.2 and earlier allow local guest administrators to cause a denial of service (long loop and hang) via a crafted extent_order value. (bnc#789950)

XSA-44: CVE-2013-1917: Xen 3.1 through 4.x, when running 64-bit hosts on Intel CPUs, does not clear the NT flag when using an IRET after a SYSENTER instruction, which allows PV guest users to cause a denial of service (hypervisor crash) by triggering a #GP fault, which is not properly handled by another IRET instruction. (bnc#813673)

XSA-47: CVE-2013-1920: Xen 4.2.x, 4.1.x, and earlier, when the hypervisor is running 'under memory pressure' and the Xen Security Module (XSM) is enabled, uses the wrong ordering of operations when extending the per-domain event channel tracking table, which causes a use-after-free and allows local guest kernels to inject arbitrary events and gain privileges via unspecified vectors. (bnc#813677)

XSA-55: CVE-2013-2196: Multiple unspecified vulnerabilities in the Elf parser (libelf) in Xen 4.2.x and earlier allow local guest administrators with certain permissions to have an unspecified impact via a crafted kernel, related to 'other problems' that are not CVE-2013-2194 or CVE-2013-2195. (bnc#823011)

XSA-55: CVE-2013-2195: The Elf parser (libelf) in Xen 4.2.x and earlier allow local guest administrators with certain permissions to have an unspecified impact via a crafted kernel, related to 'pointer dereferences' involving unexpected calculations. (bnc#823011)

XSA-55: CVE-2013-2194: Multiple integer overflows in the Elf parser (libelf) in Xen 4.2.x and earlier allow local guest administrators with certain permissions to have an unspecified impact via a crafted kernel. (bnc#823011)

XSA-63: CVE-2013-4355: Xen 4.3.x and earlier does not properly handle certain errors, which allows local HVM guests to obtain hypervisor stack memory via a (1) port or (2) memory mapped I/O write or (3) other unspecified operations related to addresses without associated memory.
(bnc#840592)

XSA-67: CVE-2013-4368: The outs instruction emulation in Xen 3.1.x, 4.2.x, 4.3.x, and earlier, when using FS: or GS:
segment override, uses an uninitialized variable as a segment base, which allows local 64-bit PV guests to obtain sensitive information (hypervisor stack content) via unspecified vectors related to stale data in a segment register. (bnc#842511)

XSA-73: CVE-2013-4494: Xen before 4.1.x, 4.2.x, and 4.3.x does not take the page_alloc_lock and grant_table.lock in the same order, which allows local guest administrators with access to multiple vcpus to cause a denial of service (host deadlock) via unspecified vectors. (bnc#848657)

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-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)

Note that Tenable Network Security has extracted the preceding description block directly from the SUSE security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

The SUSE Linux Enterprise Server 10 Service Pack 4 LTSS Xen hypervisor and toolset have been updated to fix various security issues.

The following security issues have been addressed :

  - 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-73: CVE-2013-4494: Xen before 4.1.x, 4.2.x, and     4.3.x does not take the page_alloc_lock and     grant_table.lock in the same order, which allows local     guest administrators with access to multiple vcpus to     cause a denial of service (host deadlock) via     unspecified vectors. (bnc#848657)

  - XSA-67: CVE-2013-4368: The outs instruction emulation in     Xen 3.1.x, 4.2.x, 4.3.x, and earlier, when using FS: or     GS: segment override, uses an uninitialized variable as     a segment base, which allows local 64-bit PV guests to     obtain sensitive information (hypervisor stack content)     via unspecified vectors related to stale data in a     segment register. (bnc#842511)

  - XSA-63: CVE-2013-4355: Xen 4.3.x and earlier does not     properly handle certain errors, which allows local HVM     guests to obtain hypervisor stack memory via a (1) port     or (2) memory mapped I/O write or (3) other unspecified     operations related to addresses without associated     memory. (bnc#840592)

  - XSA-55: CVE-2013-2196: Multiple unspecified     vulnerabilities in the Elf parser (libelf) in Xen 4.2.x     and earlier allow local guest administrators with     certain permissions to have an unspecified impact via a     crafted kernel, related to 'other problems' that are not     CVE-2013-2194 or CVE-2013-2195. (bnc#823011)

  - XSA-55: CVE-2013-2195: The Elf parser (libelf) in Xen     4.2.x and earlier allow local guest administrators with     certain permissions to have an unspecified impact via a     crafted kernel, related to 'pointer dereferences'     involving unexpected calculations. (bnc#823011)

  - XSA-55: CVE-2013-2194: Multiple integer overflows in the     Elf parser (libelf) in Xen 4.2.x and earlier allow local     guest administrators with certain permissions to have an     unspecified impact via a crafted kernel. (bnc#823011)

  - XSA-47: CVE-2013-1920: Xen 4.2.x, 4.1.x, and earlier,     when the hypervisor is running 'under memory pressure'     and the Xen Security Module (XSM) is enabled, uses the     wrong ordering of operations when extending the     per-domain event channel tracking table, which causes a     use-after-free and allows local guest kernels to inject     arbitrary events and gain privileges via unspecified     vectors. (bnc#813677)

  - XSA-44: CVE-2013-1917: Xen 3.1 through 4.x, when running     64-bit hosts on Intel CPUs, does not clear the NT flag     when using an IRET after a SYSENTER instruction, which     allows PV guest users to cause a denial of service     (hypervisor crash) by triggering a #GP fault, which is     not properly handled by another IRET instruction.
    (bnc#813673)

  - XSA-25: CVE-2012-4544: The PV domain builder in Xen 4.2     and earlier does not validate the size of the kernel or     ramdisk (1) before or (2) after decompression, which     allows local guest administrators to cause a denial of     service (domain 0 memory consumption) via a crafted (a)     kernel or (b) ramdisk. (bnc#787163)

Note that Tenable Network Security has extracted the preceding description block directly from the SUSE security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

The remote OracleVM system is missing necessary patches to address critical security updates : please see Oracle VM Security Advisory OVMSA-2015-0068 for details.

Multiple security issues have been discovered in the Xen virtualisation solution which may result in information leaks or denial of service.

ID	Name	Product	Family	Published	Updated	Severity
217808	Linux Distros Unpatched Vulnerability : CVE-2013-2196	Nessus	Misc.	3/4/2025	7/29/2026	critical
79516	OracleVM 3.2 : xen (OVMSA-2013-0069)	Nessus	OracleVM Local Security Checks	11/26/2014	1/4/2021	medium
67292	Fedora 18 : xen-4.2.2-7.fc18 (2013-10941)	Nessus	Fedora Local Security Checks	7/12/2013	1/11/2021	medium
83617	SUSE SLES10 Security Update : Xen (SUSE-SU-2014:0470-1)	Nessus	SuSE Local Security Checks	5/20/2015	1/19/2021	medium
83614	SUSE SLES10 Security Update : Xen (SUSE-SU-2014:0411-1)	Nessus	SuSE Local Security Checks	5/20/2015	1/19/2021	medium
67290	Fedora 19 : xen-4.2.2-7.fc19 (2013-10908)	Nessus	Fedora Local Security Checks	7/12/2013	1/11/2021	medium
84140	OracleVM 3.2 : xen (OVMSA-2015-0068) (POODLE) (Venom)	Nessus	OracleVM Local Security Checks	6/12/2015	1/4/2021	low
77240	Debian DSA-3006-1 : xen - security update	Nessus	Debian Local Security Checks	8/19/2014	1/11/2021	high

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