SB2016103003 - Fedora 23 update for xen
Published: October 30, 2016 Updated: April 24, 2025
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 10 secuirty vulnerabilities.
1) Resource management error (CVE-ID: CVE-2016-8576)
The vulnerability allows a local privileged user to a crash the entire system.
The xhci_ring_fetch function in hw/usb/hcd-xhci.c in QEMU (aka Quick Emulator) allows local guest OS administrators to cause a denial of service (infinite loop and QEMU process crash) by leveraging failure to limit the number of link Transfer Request Blocks (TRB) to process. <a href="http://cwe.mitre.org/data/definitions/835.html">CWE-835: Loop with Unreachable Exit Condition ('Infinite Loop')</a>
2) Memory leak (CVE-ID: CVE-2016-8577)
The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.
The vulnerability exists due to memory leak within the v9fs_read function in hw/9pfs/9p.c in QEMU (aka Quick Emulator) allows local guest OS administrators to cause a denial of service (memory consumption) via vectors related to an I/O read operation. A remote attacker can perform a denial of service attack.
3) NULL pointer dereference (CVE-ID: CVE-2016-8578)
The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.
The vulnerability exists due to a NULL pointer dereference error in fsdev/9p-iov-marshal.c in QEMU (aka Quick Emulator) allows local guest OS administrators to cause a denial of service (NULL pointer dereference and QEMU process crash) by sending an empty string parameter to a 9P operation. A remote attacker can perform a denial of service (DoS) attack.
4) Division by zero (CVE-ID: CVE-2016-8669)
The vulnerability allows a local privileged user to a crash the entire system.
The serial_update_parameters function in hw/char/serial.c in QEMU (aka Quick Emulator) allows local guest OS administrators to cause a denial of service (divide-by-zero error and QEMU process crash) via vectors involving a value of divider greater than baud base.
5) Resource management error (CVE-ID: CVE-2016-8910)
The vulnerability allows a local privileged user to a crash the entire system.
The rtl8139_cplus_transmit function in hw/net/rtl8139.c in QEMU (aka Quick Emulator) allows local guest OS administrators to cause a denial of service (infinite loop and CPU consumption) by leveraging failure to limit the ring descriptor count. <a href="http://cwe.mitre.org/data/definitions/835.html">CWE-835: Loop with Unreachable Exit Condition ('Infinite Loop')</a>
6) Memory leak (CVE-ID: CVE-2016-9102)
The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.
The vulnerability exists due to memory leak within the v9fs_xattrcreate function in hw/9pfs/9p.c in QEMU (aka Quick Emulator) allows local guest OS administrators to cause a denial of service (memory consumption and QEMU process crash) via a large number of Txattrcreate messages with the same fid number. A remote attacker can perform a denial of service attack.
7) Buffer overflow (CVE-ID: CVE-2016-9103)
The vulnerability allows a local privileged user to gain access to sensitive information.
The v9fs_xattrcreate function in hw/9pfs/9p.c in QEMU (aka Quick Emulator) allows local guest OS administrators to obtain sensitive host heap memory information by reading xattribute values before writing to them.
8) Out-of-bounds read (CVE-ID: CVE-2016-9104)
The vulnerability allows a local privileged user to perform a denial of service (DoS) attack.
Multiple integer overflows in the (1) v9fs_xattr_read and (2) v9fs_xattr_write functions in hw/9pfs/9p.c in QEMU (aka Quick Emulator) allow local guest OS administrators to cause a denial of service (QEMU process crash) via a crafted offset, which triggers an out-of-bounds access.
9) Memory leak (CVE-ID: CVE-2016-9105)
The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.
The vulnerability exists due to memory leak within the v9fs_link function in hw/9pfs/9p.c in QEMU (aka Quick Emulator) allows local guest OS administrators to cause a denial of service (memory consumption) via vectors involving a reference to the source fid object. A remote attacker can perform a denial of service attack.
10) Memory leak (CVE-ID: CVE-2016-9106)
The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.
The vulnerability exists due to memory leak within the v9fs_write function in hw/9pfs/9p.c in QEMU (aka Quick Emulator) allows local guest OS administrators to cause a denial of service (memory consumption) by leveraging failure to free an IO vector. A remote attacker can perform a denial of service attack.
Remediation
Install update from vendor's website.