Stack-based buffer overflow in the xl command line utility in Xen 4.1.x through 4.5.x allows local guest administrators to gain privileges via a long configuration argument.

The remote host is affected by the vulnerability described in GLSA-201604-03 (Xen: Multiple vulnerabilities)

    Multiple vulnerabilities have been discovered in Xen. Please review the       CVE identifiers referenced below for details.
  Impact :

    A local attacker could possibly cause a Denial of Service condition or       obtain sensitive information.
  Workaround :

    There is no known workaround at this time.

This update fixes the following security issues :

  - bsc#956832 - CVE-2015-8345: xen: qemu: net: eepro100:
    infinite loop in processing command block list

  - Revert x86/IO-APIC: don't create pIRQ mapping from     masked RTE until kernel maintenance release goes out.

  - bsc#956592 - xen: virtual PMU is unsupported (XSA-163)

  - bsc#956408 - CVE-2015-8339, CVE-2015-8340: xen:
    XENMEM_exchange error handling issues (XSA-159)

  - bsc#956409 - CVE-2015-8341: xen: libxl leak of pv kernel     and initrd on error (XSA-160)

  - bsc#956411 - CVE-2015-7504: xen: heap buffer overflow     vulnerability in pcnet emulator (XSA-162)

  - bsc#947165 - CVE-2015-7311: xen: libxl fails to honour     readonly flag on disks with qemu-xen (xsa-142)

  - bsc#954405 - CVE-2015-8104: Xen: guest to host DoS by     triggering an infinite loop in microcode via #DB     exception

  - bsc#954018 - CVE-2015-5307: xen: x86: CPU lockup during     fault delivery (XSA-156)

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.

This update fixes the following security issues :

  - bsc#947165 - CVE-2015-7311: xen: libxl fails to honour     readonly flag on disks with qemu-xen (xsa-142)

  - bsc#954405 - CVE-2015-8104: Xen: guest to host DoS by     triggering an infinite loop in microcode via #DB     exception

  - bsc#954018 - CVE-2015-5307: xen: x86: CPU lockup during     fault delivery (XSA-156)

  - bsc#950704 - CVE-2015-7970 xen: x86: Long latency     populate-on-demand operation is not preemptible     (XSA-150)     563212c9-x86-PoD-Eager-sweep-for-zeroed-pages.patch

Multiple security issues have been found in the Xen virtualisation solution, which may result in denial of service or information disclosure.

xen was updated to fix 12 security issues.

These security issues were fixed :

  - CVE-2015-7972: Populate-on-demand balloon size     inaccuracy can crash guests (bsc#951845).

  - CVE-2015-7969: Leak of main per-domain vcpu pointer     array (DoS) (bsc#950703).

  - CVE-2015-7969: Leak of per-domain profiling-related vcpu     pointer array (DoS) (bsc#950705).

  - CVE-2015-7971: Some pmu and profiling hypercalls log     without rate limiting (bsc#950706).

  - CVE-2015-4037: Insecure temporary file use in     /net/slirp.c (bsc#932267).

  - CVE-2014-0222: Validate L2 table size to avoid integer     overflows (bsc#877642).

  - CVE-2015-7835: Uncontrolled creation of large page     mappings by PV guests (bsc#950367).

  - CVE-2015-7311: libxl fails to honour readonly flag on     disks with qemu-xen (bsc#947165).

  - CVE-2015-5165: QEMU leak of uninitialized heap memory in     rtl8139 device model (bsc#939712).

  - CVE-2015-5166: Use after free in QEMU/Xen block unplug     protocol (bsc#939709).

  - CVE-2015-5154: Host code execution via IDE subsystem     CD-ROM (bsc#938344).

  - CVE-2015-3259: xl command line config handling stack     overflow (bsc#935634).

These non-security issues were fixed :

  - bsc#907514: Bus fatal error and sles12 sudden reboot has     been observed

  - bsc#910258: SLES12 Xen host crashes with FATAL NMI after     shutdown of guest with VT-d NIC

  - bsc#918984: Bus fatal error and sles11-SP4 sudden reboot     has been observed

  - bsc#923967: Partner-L3: Bus fatal error and sles11-SP3     sudden reboot has been observed

  - bsc#901488: Intel ixgbe driver assigns rx/tx queues per     core resulting in irq problems on servers with a large     amount of CPU cores

  - bsc#945167: Running command xl pci-assignable-add     03:10.1 secondly show errors

  - bsc#949138: Setting vcpu affinity under Xen causes     libvirtd abort

  - bsc#944463: VUL-0: CVE-2015-5239: qemu-kvm: Integer     overflow in vnc_client_read() and protocol_client_msg()

  - bsc#944697: VUL-1: CVE-2015-6815: qemu: net: e1000:
    infinite loop issue

  - bsc#925466: Kdump does not work in a XEN environment

xen was updated to fix the following security issues :

  - CVE-2015-5165: QEMU leak of uninitialized heap memory in     rtl8139 device model (bsc#939712, XSA-140)

  - CVE-2015-5166: Use after free in QEMU/Xen block unplug     protocol (bsc#939709, XSA-139)

  - CVE-2015-2751: Certain domctl operations could have be     used to lock up the host (bsc#922709, XSA-127)

  - CVE-2015-3259: xl command line config handling stack     overflow (bsc#935634, XSA-137)

  - CVE-2015-4164: DoS through iret hypercall handler     (bsc#932996, XSA-136)

  - CVE-2015-5154: Host code execution via IDE subsystem     CD-ROM (bsc#938344)

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.

xen was updated to fix two security issues.

These security issues were fixed :

  - CVE-2015-3259: xl command line config handling stack     overflow (bsc#935634, XSA-137).

  - CVE-2015-5154: Host code execution via IDE subsystem     CD-ROM (bsc#938344).

The update package also includes non-security fixes. See advisory for details.

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 Xen Project reports :

The xl command line utility mishandles long configuration values when passed as command line arguments, with a buffer overrun.

A semi-trusted guest administrator or controller, who is intended to be able to partially control the configuration settings for a domain, can escalate their privileges to that of the whole host.

ID	Name	Product	Family	Severity
90380	GLSA-201604-03 : Xen: Multiple vulnerabilities (Venom)	Nessus	Gentoo Local Security Checks	critical
87588	SUSE SLED12 / SLES12 Security Update : xen (SUSE-SU-2015:2324-1)	Nessus	SuSE Local Security Checks	high
87393	openSUSE Security Update : xen (openSUSE-2015-892)	Nessus	SuSE Local Security Checks	medium
87288	Debian DSA-3414-1 : xen - security update	Nessus	Debian Local Security Checks	medium
86909	openSUSE Security Update : xen (openSUSE-2015-750)	Nessus	SuSE Local Security Checks	medium
85792	SUSE SLED11 Security Update : xen (SUSE-SU-2015:1479-2)	Nessus	SuSE Local Security Checks	high
85791	SUSE SLED11 / SLES11 Security Update : xen (SUSE-SU-2015:1479-1)	Nessus	SuSE Local Security Checks	high
85074	SUSE SLED12 / SLES12 Security Update : xen (SUSE-SU-2015:1302-1)	Nessus	SuSE Local Security Checks	high
85073	SUSE SLED11 / SLES11 Security Update : xen (SUSE-SU-2015:1299-1)	Nessus	SuSE Local Security Checks	high
84717	FreeBSD : xen-tools -- xl command line config handling stack overflow (f1deed23-27ec-11e5-a4a5-002590263bf5)	Nessus	FreeBSD Local Security Checks	medium

Detections

Analytics

CVE-2015-3259

medium

Tenable Plugins

critical

high

medium

medium

medium

high

high

high

high

medium