Stack-based buffer overflow in libpixman, as used in Pale Moon before 15.4 and possibly other products, has unspecified impact and context-dependent attack vectors. NOTE: this issue might be resultant from an integer overflow in the fast_composite_scaled_bilinear function in pixman-inlines.h, which triggers an infinite loop.

An updated rhev-hypervisor6 package that fixes several security issues and various bugs is now available.

The Red Hat Security Response Team has rated this update as having important security impact. Common Vulnerability Scoring System (CVSS) base scores, which give detailed severity ratings, are available for each vulnerability from the CVE links in the References section.

The rhev-hypervisor6 package provides a Red Hat Enterprise Virtualization Hypervisor ISO disk image. The Red Hat Enterprise Virtualization Hypervisor is a dedicated Kernel-based Virtual Machine (KVM) hypervisor. It includes everything necessary to run and manage virtual machines: A subset of the Red Hat Enterprise Linux operating environment and the Red Hat Enterprise Virtualization Agent.

Note: Red Hat Enterprise Virtualization Hypervisor is only available for the Intel 64 and AMD64 architectures with virtualization extensions.

A flaw was found in the way KVM handled guest time updates when the buffer the guest registered by writing to the MSR_KVM_SYSTEM_TIME machine state register (MSR) crossed a page boundary. A privileged guest user could use this flaw to crash the host or, potentially, escalate their privileges, allowing them to execute arbitrary code at the host kernel level. (CVE-2013-1796)

A potential use-after-free flaw was found in the way KVM handled guest time updates when the GPA (guest physical address) the guest registered by writing to the MSR_KVM_SYSTEM_TIME machine state register (MSR) fell into a movable or removable memory region of the hosting user-space process (by default, QEMU-KVM) on the host. If that memory region is deregistered from KVM using KVM_SET_USER_MEMORY_REGION and the allocated virtual memory reused, a privileged guest user could potentially use this flaw to escalate their privileges on the host. (CVE-2013-1797)

A flaw was found in the way KVM emulated IOAPIC (I/O Advanced Programmable Interrupt Controller). A missing validation check in the ioapic_read_indirect() function could allow a privileged guest user to crash the host, or read a substantial portion of host kernel memory.
(CVE-2013-1798)

An integer overflow flaw was discovered in one of pixman's manipulation routines. If a remote attacker could trick an application using pixman into performing a certain manipulation, it could cause the application to crash or, possibly, execute arbitrary code with the privileges of the user running the application. (CVE-2013-1591)

Red Hat would like to thank Andrew Honig of Google for reporting CVE-2013-1796, CVE-2013-1797, and CVE-2013-1798.

This updated package provides updated components that include fixes for various security issues. These issues have no security impact on Red Hat Enterprise Virtualization Hypervisor itself, however. The security fixes included in this update address the following CVE numbers :

CVE-2013-2266 (a bind issue)

CVE-2012-5195, CVE-2012-5526, CVE-2012-6329, and CVE-2013-1667 (perl issues)

This update contains the fixes from the following errata :

ovirt-node: RHBA-2013:0745 libvirt: RHBA-2013:0725 vdsm:
RHBA-2013:0704 kernel: RHSA-2013:0744

Users of the Red Hat Enterprise Virtualization Hypervisor are advised to upgrade to this updated package, which corrects these issues.

libpixman was updated to fix a stack based buffer overflow (CVE-2013-1591).

A stack-based buffer overflow in the pixman library has been fixed.
(CVE-2013-1591)

From Red Hat Security Advisory 2013:0687 :

Updated pixman packages that fix one security issue are now available for Red Hat Enterprise Linux 6.

The Red Hat Security Response Team has rated this update as having moderate security impact. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available from the CVE link in the References section.

Pixman is a pixel manipulation library for the X Window System and Cairo.

An integer overflow flaw was discovered in one of pixman's manipulation routines. If a remote attacker could trick an application using pixman into performing a certain manipulation, it could cause the application to crash or, possibly, execute arbitrary code with the privileges of the user running the application. (CVE-2013-1591)

Users are advised to upgrade to these updated packages, which contain a backported patch to correct this issue. All applications using pixman must be restarted for this update to take effect.

Updated pixman packages fix security vulnerability :

Stack-based buffer overflow in libpixman has unspecified impact and attack vectors (CVE-2013-1591).

Updated pixman packages that fix one security issue are now available for Red Hat Enterprise Linux 6.

The Red Hat Security Response Team has rated this update as having moderate security impact. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available from the CVE link in the References section.

Pixman is a pixel manipulation library for the X Window System and Cairo.

An integer overflow flaw was discovered in one of pixman's manipulation routines. If a remote attacker could trick an application using pixman into performing a certain manipulation, it could cause the application to crash or, possibly, execute arbitrary code with the privileges of the user running the application. (CVE-2013-1591)

Users are advised to upgrade to these updated packages, which contain a backported patch to correct this issue. All applications using pixman must be restarted for this update to take effect.

An integer overflow flaw was discovered in one of pixman's manipulation routines. If a remote attacker could trick an application using pixman into performing a certain manipulation, it could cause the application to crash or, possibly, execute arbitrary code with the privileges of the user running the application. (CVE-2013-1591)

All applications using pixman must be restarted for this update to take effect.

Update to pixman 0.28 to address CVE-2013-1591

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.

ID	Name	Product	Family	Severity
78955	RHEL 6 : rhev-hypervisor6 (RHSA-2013:0746)	Nessus	Red Hat Local Security Checks	critical
75131	openSUSE Security Update : pixman (openSUSE-SU-2013:1421-1)	Nessus	SuSE Local Security Checks	critical
69457	SuSE 11.3 Security Update : libpixman (SAT Patch Number 8119)	Nessus	SuSE Local Security Checks	critical
68798	Oracle Linux 6 : pixman (ELSA-2013-0687)	Nessus	Oracle Linux Local Security Checks	critical
66128	Mandriva Linux Security Advisory : pixman (MDVSA-2013:116)	Nessus	Mandriva Local Security Checks	critical
65725	CentOS 6 : pixman (CESA-2013:0687)	Nessus	CentOS Local Security Checks	critical
65716	Scientific Linux Security Update : pixman on SL6.x i386/x86_64 (20130327)	Nessus	Scientific Linux Local Security Checks	critical
65714	RHEL 6 : pixman (RHSA-2013:0687)	Nessus	Red Hat Local Security Checks	critical
64974	Fedora 17 : pixman-0.28.0-1.fc17 (2013-2450)	Nessus	Fedora Local Security Checks	critical
64900	Fedora 18 : pixman-0.28.0-1.fc18 (2013-2414)	Nessus	Fedora Local Security Checks	critical

Detections

Analytics

CVE-2013-1591

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