#ubuntu

Ubuntu Security Notice 6244-1 - Tavis Ormandy discovered that some AMD processors did not properly handle speculative execution of certain vector register instructions. A local attacker could use this to expose sensitive information.

Ubuntu Security Notice 6129-2 - USN-6129-1 fixed a vulnerability in Avahi. This update provides the corresponding update for Ubuntu 14.04 LTS, Ubuntu 16.04 LTS and Ubuntu 18.04 LTS. It was discovered that Avahi incorrectly handled certain DBus messages. A local attacker could possibly use this issue to cause Avahi to crash, resulting in a denial of service.

Ubuntu Security Notice 6246-1 - It was discovered that the IP-VLAN network driver for the Linux kernel did not properly initialize memory in some situations, leading to an out-of- bounds write vulnerability. An attacker could use this to cause a denial of service or possibly execute arbitrary code. Mingi Cho discovered that the netfilter subsystem in the Linux kernel did not properly validate the status of a nft chain while performing a lookup by id, leading to a use-after-free vulnerability. An attacker could use this to cause a denial of service or possibly execute arbitrary code.

On Ubuntu kernels carrying both c914c0e27eb0 and "UBUNTU: SAUCE: overlayfs: Skip permission checking for trusted.overlayfs.* xattrs", an unprivileged user may set privileged extended attributes on the mounted files, leading them to be set on the upper files without the appropriate security checks.

Local privilege escalation vulnerability in Ubuntu Kernels overlayfs ovl_copy_up_meta_inode_data skip permission checks when calling ovl_do_setxattr on Ubuntu kernels

Ubuntu Security Notice 6243-1 - It was discovered that Graphite-Web incorrectly handled certain inputs. If a user or an automated system were tricked into opening a specially crafted input file, a remote attacker could possibly use this issue to perform server-side request forgery and obtain sensitive information. This issue only affected Ubuntu 16.04 LTS and Ubuntu 18.04 LTS. It was discovered that Graphite-Web incorrectly handled certain inputs. If a user or an automated system were tricked into opening a specially crafted input file, a remote attacker could possibly use this issue to perform cross site scripting and obtain sensitive information.

Ubuntu Security Notice 6242-1 - It was discovered that OpenSSH incorrectly handled loading certain PKCS#11 providers. If a user forwarded their ssh-agent to an untrusted system, a remote attacker could possibly use this issue to load arbitrary libraries from the user's system and execute arbitrary code.

Ubuntu Security Notice 6240-1 - It was discovered that FRR incorrectly handled certain messages. An attacker could possibly use this issue to cause a denial of service.

Ubuntu Security Notice 6203-2 - USN-6203-1 fixed a vulnerability in Django. This update provides the corresponding update for Ubuntu 18.04 ESM. Seokchan Yoon discovered that Django incorrectly handled certain regular expressions. A remote attacker could possibly use this issue to cause Django to consume resources, leading to a denial of service.

Ubuntu Security Notice 6241-1 - Jan Wasilewski and Gorka Eguileor discovered that OpenStack incorrectly handled deleted volume attachments. An authenticated user or attacker could possibly use this issue to gain access to sensitive information.