Security Information / 2017 / Security Information -- DSA-3945-1 linux

Debian Security Advisory

DSA-3945-1 linux -- security update

Date Reported:

17 Aug 2017

Affected Packages:

linux

Vulnerable:

Yes

Security database references:

In Mitre's CVE dictionary: CVE-2014-9940, CVE-2017-7346, CVE-2017-7482, CVE-2017-7533, CVE-2017-7541, CVE-2017-7542, CVE-2017-7889, CVE-2017-9605, CVE-2017-10911, CVE-2017-11176, CVE-2017-1000363, CVE-2017-1000365.

More information:

Several vulnerabilities have been discovered in the Linux kernel that may lead to a privilege escalation, denial of service or information leaks.

• CVE-2014-9940

  A use-after-free flaw in the voltage and current regulator driver could allow a local user to cause a denial of service or potentially escalate privileges.

• CVE-2017-7346

  Li Qiang discovered that the DRM driver for VMware virtual GPUs does not properly check user-controlled values in the vmw_surface_define_ioctl() functions for upper limits. A local user can take advantage of this flaw to cause a denial of service.

• CVE-2017-7482

  Shi Lei discovered that RxRPC Kerberos 5 ticket handling code does not properly verify metadata, leading to information disclosure, denial of service or potentially execution of arbitrary code.

• CVE-2017-7533

  Fan Wu and Shixiong Zhao discovered a race condition between inotify events and VFS rename operations allowing an unprivileged local attacker to cause a denial of service or escalate privileges.

• CVE-2017-7541

  A buffer overflow flaw in the Broadcom IEEE802.11n PCIe SoftMAC WLAN driver could allow a local user to cause kernel memory corruption, leading to a denial of service or potentially privilege escalation.

• CVE-2017-7542

  An integer overflow vulnerability in the ip6_find_1stfragopt() function was found allowing a local attacker with privileges to open raw sockets to cause a denial of service.

• CVE-2017-7889

  Tommi Rantala and Brad Spengler reported that the mm subsystem does not properly enforce the CONFIG_STRICT_DEVMEM protection mechanism, allowing a local attacker with access to /dev/mem to obtain sensitive information or potentially execute arbitrary code.

• CVE-2017-9605

  Murray McAllister discovered that the DRM driver for VMware virtual GPUs does not properly initialize memory, potentially allowing a local attacker to obtain sensitive information from uninitialized kernel memory via a crafted ioctl call.

• CVE-2017-10911

  / XSA-216

  Anthony Perard of Citrix discovered an information leak flaw in Xen blkif response handling, allowing a malicious unprivileged guest to obtain sensitive information from the host or other guests.

• CVE-2017-11176

  It was discovered that the mq_notify() function does not set the sock pointer to NULL upon entry into the retry logic. An attacker can take advantage of this flaw during a userspace close of a Netlink socket to cause a denial of service or potentially cause other impact.

• CVE-2017-1000363

  Roee Hay reported that the lp driver does not properly bounds-check passed arguments, allowing a local attacker with write access to the kernel command line arguments to execute arbitrary code.

• CVE-2017-1000365

  It was discovered that argument and environment pointers are not taken properly into account to the imposed size restrictions on arguments and environmental strings passed through RLIMIT_STACK/RLIMIT_INFINITY. A local attacker can take advantage of this flaw in conjunction with other flaws to execute arbitrary code.

For the oldstable distribution (jessie), these problems have been fixed in version 3.16.43-2+deb8u3.

We recommend that you upgrade your linux packages.