USN-4576-1

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USN-4576-1

Summary: linux, linux-aws, linux-aws-5.4, linux-azure, linux-azure-5.4, linux-gcp, linux-gcp-5.4, linux-hwe-5.4, linux-kvm, linux-oracle, linux-oracle-5.4, linux-raspi, linux-raspi-5.4 vulnerabilities

Details: Hadar Manor discovered that the DCCP protocol implementation in the Linux kernel improperly handled socket reuse, leading to a use-after-free vulnerability. A local attacker could use this to cause a denial of service (system crash) or possibly execute arbitrary code. (CVE-2020-16119) Jay Shin discovered that the ext4 file system implementation in the Linux kernel did not properly handle directory access with broken indexing, leading to an out-of-bounds read vulnerability. A local attacker could use this to cause a denial of service (system crash). (CVE-2020-14314) David Alan Gilbert discovered that the XFS file system implementation in the Linux kernel did not properly perform metadata validation in some circumstances. A local attacker could use this to cause a denial of service. (CVE-2020-14385) Giuseppe Scrivano discovered that the overlay file system in the Linux kernel did not properly perform permission checks in some situations. A local attacker could possibly use this to bypass intended restrictions and gain read access to restricted files. (CVE-2020-16120) It was discovered that a race condition existed in the hugetlb sysctl implementation in the Linux kernel. A privileged attacker could use this to cause a denial of service (system crash). (CVE-2020-25285) It was discovered that the block layer subsystem in the Linux kernel did not properly handle zero-length requests. A local attacker could use this to cause a denial of service. (CVE-2020-25641)

References: https://ubuntu.com/security/notices/USN-4576-1, https://ubuntu.com/security/CVE-2020-14314, https://ubuntu.com/security/CVE-2020-14385, https://ubuntu.com/security/CVE-2020-16119, https://ubuntu.com/security/CVE-2020-16120, https://ubuntu.com/security/CVE-2020-25285, https://ubuntu.com/security/CVE-2020-25641