SB2015092508 - SUSE Linux update for Xen
Published: September 25, 2015
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 4 secuirty vulnerabilities.
1) Buffer overflow (CVE-ID: CVE-2015-3209)
The vulnerability allows a remote non-authenticated attacker to read and manipulate data.
Heap-based buffer overflow in the PCNET controller in QEMU allows remote attackers to execute arbitrary code by sending a packet with TXSTATUS_STARTPACKET set and then a crafted packet with TXSTATUS_DEVICEOWNS set.
2) Resource management error (CVE-ID: CVE-2015-4164)
The vulnerability allows a remote non-authenticated attacker to perform a denial of service (DoS) attack.
The compat_iret function in Xen 3.1 through 4.5 iterates the wrong way through a loop, which allows local 32-bit PV guest administrators to cause a denial of service (large loop and system hang) via a hypercall_iret call with EFLAGS.VM set.
3) Heap-based buffer overflow (CVE-ID: CVE-2015-5154)
The vulnerability allows a remote attacker to execute arbitrary code on the target system.
The vulnerability exists due to a boundary error in Heap-based buffer overflow in the IDE subsystem in QEMU, as used in Xen 4.5.x and earlier, when the container has a CDROM drive enabled,. A remote attacker can use unspecified ATAPI commands. to trigger heap-based buffer overflow and execute arbitrary code on the target system.
Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.
4) Information disclosure (CVE-ID: CVE-2015-5165)
The vulnerability allows a remote non-authenticated attacker to gain access to sensitive information.
The C+ mode offload emulation in the RTL8139 network card device model in QEMU, as used in Xen 4.5.x and earlier, allows remote attackers to read process heap memory via unspecified vectors.
Remediation
Install update from vendor's website.