Ubuntu Security Notice USN-2512-1

Ubuntu Security Notice 2512-1 – A race condition was discovered in the Linux kernel’s key ring. A local user could cause a denial of service (memory corruption or panic) or possibly have unspecified impact via the keyctl commands. A memory leak was discovered in the ISO 9660 CDROM file system when parsing rock ridge ER records. A local user could exploit this flaw to obtain sensitive information from kernel memory via a crafted iso9660 image. Various other issues were also addressed.

Ubuntu Security Notice USN-2520-1

Ubuntu Security Notice 2520-1 – Peter De Wachter discovered that CUPS incorrectly handled certain malformed compressed raster files. A remote attacker could use this issue to cause CUPS to crash, resulting in a denial of service, or possibly execute arbitrary code.

Ubuntu Security Notice USN-2519-1

Ubuntu Security Notice 2519-1 – Arnaud Le Blanc discovered that the GNU C Library incorrectly handled file descriptors when resolving DNS queries under high load. This may cause a denial of service in other applications, or an information leak. This issue only affected Ubuntu 10.04 LTS, Ubuntu 12.04 LTS and Ubuntu 14.04 LTS. It was discovered that the GNU C Library incorrectly handled receiving a positive answer while processing the network name when performing DNS resolution. A remote attacker could use this issue to cause the GNU C Library to hang, resulting in a denial of service. Various other issues were also addressed.