Ubuntu: Security Advisory for linux-bluefield (USN-5137-2)

Published: 2021-11-12 02:00:32
CVE Author: NIST National Vulnerability Database

CVSS Base Vector:
AV:N/AC:M/Au:N/C:P/I:P/A:P

Summary:
The remote host is missing an update for the 'linux-bluefield' Linux Distribution Package(s) announced via the USN-5137-2 advisory.

Detection Method:
Checks if a vulnerable Linux Distribution Package version is present on the target host.

Technical Details:
It was discovered that the f2fs file system in the Linux kernel did not properly validate metadata in some situations. An attacker could use this to construct a malicious f2fs image that, when mounted and operated on, could cause a denial of service (system crash) or possibly execute arbitrary code. (CVE-2019-19449) It was discovered that the Infiniband RDMA userspace connection manager implementation in the Linux kernel contained a race condition leading to a use-after-free vulnerability. A local attacker could use this to cause a denial of service (system crash) or possible execute arbitrary code. (CVE-2020-36385) Wolfgang Frisch discovered that the ext4 file system implementation in the Linux kernel contained an integer overflow when handling metadata inode extents. An attacker could use this to construct a malicious ext4 file system image that, when mounted, could cause a denial of service (system crash). (CVE-2021-3428) Benedict Schlueter discovered that the BPF subsystem in the Linux kernel did not properly protect against Speculative Store Bypass (SSB) side- channel attacks in some situations. A local attacker could possibly use this to expose sensitive information. (CVE-2021-34556) Piotr Krysiuk discovered that the BPF subsystem in the Linux kernel did not properly protect against Speculative Store Bypass (SSB) side-channel attacks in some situations. A local attacker could possibly use this to expose sensitive information. (CVE-2021-35477) It was discovered that the btrfs file system in the Linux kernel did not properly handle removing a non-existent device id. An attacker with CAP_SYS_ADMIN could use this to cause a denial of service. (CVE-2021-3739) It was discovered that the Qualcomm IPC Router protocol implementation in the Linux kernel did not properly validate metadata in some situations. A local attacker could use this to cause a denial of service (system crash) or expose sensitive information. (CVE-2021-3743) It was discovered that the virtual terminal (vt) device implementation in the Linux kernel contained a race condition in its ioctl handling that led to an out-of-bounds read vulnerability. A local attacker could possibly use this to expose sensitive information. (CVE-2021-3753) It was discovered that the Linux kernel did not properly account for the memory usage of certain IPC objects. A local attacker could use this to cause a denial of service (memory exhaustion). (CVE-2021-3759)

Affected Versions:
'linux-bluefield' Linux Distribution Package(s) on Ubuntu 20.04 LTS, Ubuntu 18.04 LTS.

Recommendations:
Please install the updated Linux Distribution Package(s).

Solution Type:
Vendor Patch

Detection Type:
Linux Distribution Package

NIST (National Institute of Standards and Technology) NVD (National Vulnerability Database)

https://nvd.nist.gov/vuln/detail/CVE-2019-19449
https://nvd.nist.gov/vuln/detail/CVE-2020-36385
https://nvd.nist.gov/vuln/detail/CVE-2021-3428
https://nvd.nist.gov/vuln/detail/CVE-2021-34556
https://nvd.nist.gov/vuln/detail/CVE-2021-35477
https://nvd.nist.gov/vuln/detail/CVE-2021-3739
https://nvd.nist.gov/vuln/detail/CVE-2021-3743
https://nvd.nist.gov/vuln/detail/CVE-2021-3753
https://nvd.nist.gov/vuln/detail/CVE-2021-3759

References:


https://lists.ubuntu.com/archives/ubuntu-security-announce/2021-November/006274.html

Severity
Medium
CVSS Score
6.8
Published
2021-11-12
Modified
2021-11-29
Category
Ubuntu Local Security Checks

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