SB2015061302 - Fedora 22 update for xen

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Main Vulnerability Database SB2015061302

SB2015061302 - Fedora 22 update for xen

Published: June 13, 2015 Updated: April 24, 2025

Security Bulletin ID SB2015061302
Severity
Medium
Patch available
YES
Number of vulnerabilities 3
Exploitation vector Remote access
Highest impact Data manipulation

Breakdown by Severity

Medium 100%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 3 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) Input validation error (CVE-ID: CVE-2015-4163)

The vulnerability allows local guest domains to perform a denial of service (DoS) attack.

The vulnerability exists due to insufficient validation of user-supplied input. A remote attacker can cause a denial of service (NULL pointer dereference) via a hypercall without a GNTTABOP_setup_table or GNTTABOP_set_version.


3) 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.


Remediation

Install update from vendor's website.

References