SB2015092647 - Fedora 22 update for xen

Description

This security bulletin contains information about 5 secuirty vulnerabilities.

1) Integer overflow (CVE-ID: CVE-2015-5239)

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to integer overflow in  the VNC display driver in QEMU. A remote attacker can pass specially crafted CLIENT_CUT_TEXT message to the application, trigger integer overflow and perform a denial of service attack via infinite loop.

2) Infinite loop (CVE-ID: CVE-2015-6815)

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to infinite loop within the process_tx_desc() function in hw/net/e1000.c in QEMU. A remote attacker can consume all available system resources and cause denial of service conditions.

3) Heap-based buffer overflow (CVE-ID: CVE-2015-5279)

The vulnerability allows a remote attacker to execute arbitrary code on the target system.

The vulnerability exists due to a boundary error in the ne2000_receive function in hw/net/ne2000.c in QEMU before 2.4.0.1. A remote attacker can use vectors related to receiving packets. 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) Infinite loop (CVE-ID: CVE-2015-5278)

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to infinite loop within the ne2000_receive() function in hw/net/ne2000.c in QEMU. A remote attacker can consume all available system resources and cause denial of service conditions.

5) Buffer overflow (CVE-ID: CVE-2015-5745)

The vulnerability allows a remote user to execute arbitrary code on the hypervisor system.

The vulnerability exists due to a boundary error in the send_control_msg function in hw/char/virtio-serial-bus.c in QEMU. A remote user can pass a specially crafted virtio control message, trigger memory corruption and execute arbitrary code on the target system.

Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.

Remediation

Install update from vendor's website.

References

• https://bodhi.fedoraproject.org/updates/FEDORA-2015-efc1d7ba5e