usn-4752-1
Vulnerability from osv_ubuntu
Published
2021-02-25 06:54
Modified
2026-06-03 10:45
Summary
linux-oem-5.6 vulnerabilities
Details

Daniele Antonioli, Nils Ole Tippenhauer, and Kasper Rasmussen discovered that legacy pairing and secure-connections pairing authentication in the Bluetooth protocol could allow an unauthenticated user to complete authentication without pairing credentials via adjacent access. A physically proximate attacker could use this to impersonate a previously paired Bluetooth device. (CVE-2020-10135)

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)

It was discovered that the block layer implementation in the Linux kernel did not properly perform reference counting in some situations, leading to a use-after-free vulnerability. A local attacker could use this to cause a denial of service (system crash). (CVE-2020-15436)

It was discovered that the serial port driver in the Linux kernel did not properly initialize a pointer in some situations. A local attacker could possibly use this to cause a denial of service (system crash). (CVE-2020-15437)

Andy Nguyen discovered that the Bluetooth HCI event packet parser in the Linux kernel did not properly handle event advertisements of certain sizes, leading to a heap-based buffer overflow. A physically proximate remote attacker could use this to cause a denial of service (system crash) or possibly execute arbitrary code. (CVE-2020-24490)

It was discovered that the NFS client implementation in the Linux kernel did not properly perform bounds checking before copying security labels in some situations. A local attacker could use this to cause a denial of service (system crash) or possibly execute arbitrary code. (CVE-2020-25212)

It was discovered that the Rados block device (rbd) driver in the Linux kernel did not properly perform privilege checks for access to rbd devices in some situations. A local attacker could use this to map or unmap rbd block devices. (CVE-2020-25284)

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)

It was discovered that the HDLC PPP implementation in the Linux kernel did not properly validate input in some situations. A local attacker could use this to cause a denial of service (system crash) or possibly execute arbitrary code. (CVE-2020-25643)

Kiyin (尹亮) discovered that the perf subsystem in the Linux kernel did not properly deallocate memory in some situations. A privileged attacker could use this to cause a denial of service (kernel memory exhaustion). (CVE-2020-25704)

It was discovered that the KVM hypervisor in the Linux kernel did not properly handle interrupts in certain situations. A local attacker in a guest VM could possibly use this to cause a denial of service (host system crash). (CVE-2020-27152)

It was discovered that the jfs file system implementation in the Linux kernel contained an out-of-bounds read vulnerability. A local attacker could use this to possibly cause a denial of service (system crash). (CVE-2020-27815)

It was discovered that an information leak existed in the syscall implementation in the Linux kernel on 32 bit systems. A local attacker could use this to expose sensitive information (kernel memory). (CVE-2020-28588)

It was discovered that the framebuffer implementation in the Linux kernel did not properly perform range checks in certain situations. A local attacker could use this to expose sensitive information (kernel memory). (CVE-2020-28915)

Jann Horn discovered a race condition in the copy-on-write implementation in the Linux kernel when handling hugepages. A local attacker could use this to gain unintended write access to read-only memory pages. (CVE-2020-29368)

Jann Horn discovered that the mmap implementation in the Linux kernel contained a race condition when handling munmap() operations, leading to a read-after-free vulnerability. A local attacker could use this to cause a denial of service (system crash) or possibly expose sensitive information. (CVE-2020-29369)

Jann Horn discovered that the romfs file system in the Linux kernel did not properly validate file system meta-data, leading to an out-of-bounds read. An attacker could use this to construct a malicious romfs image that, when mounted, exposed sensitive information (kernel memory). (CVE-2020-29371)

Jann Horn discovered that the tty subsystem of the Linux kernel did not use consistent locking in some situations, leading to a read-after-free vulnerability. A local attacker could use this to cause a denial of service (system crash) or possibly expose sensitive information (kernel memory). (CVE-2020-29660)

Jann Horn discovered a race condition in the tty subsystem of the Linux kernel in the locking for the TIOCSPGRP ioctl(), 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-2020-29661)

It was discovered that a race condition existed that caused the Linux kernel to not properly restrict exit signal delivery. A local attacker could possibly use this to send signals to arbitrary processes. (CVE-2020-35508)

References
To clipboard 

{
  "affected": [
    {
      "database_specific": {
        "cves_map": {
          "cves": [
            {
              "id": "CVE-2020-10135",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N",
                  "type": "CVSS_V3"
                },
                {
                  "score": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N",
                  "type": "CVSS_V3"
                },
                {
                  "score": "medium",
                  "type": "Ubuntu"
                }
              ]
            },
            {
              "id": "CVE-2020-14314",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "medium",
                  "type": "Ubuntu"
                }
              ]
            },
            {
              "id": "CVE-2020-15436",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "medium",
                  "type": "Ubuntu"
                }
              ]
            },
            {
              "id": "CVE-2020-15437",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "low",
                  "type": "Ubuntu"
                }
              ]
            },
            {
              "id": "CVE-2020-24490",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "medium",
                  "type": "Ubuntu"
                }
              ]
            },
            {
              "id": "CVE-2020-25212",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "medium",
                  "type": "Ubuntu"
                }
              ]
            },
            {
              "id": "CVE-2020-25284",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:N/I:H/A:N",
                  "type": "CVSS_V3"
                },
                {
                  "score": "medium",
                  "type": "Ubuntu"
                }
              ]
            },
            {
              "id": "CVE-2020-25641",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "medium",
                  "type": "Ubuntu"
                }
              ]
            },
            {
              "id": "CVE-2020-25643",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "medium",
                  "type": "Ubuntu"
                }
              ]
            },
            {
              "id": "CVE-2020-25704",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "medium",
                  "type": "Ubuntu"
                }
              ]
            },
            {
              "id": "CVE-2020-27152",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "medium",
                  "type": "Ubuntu"
                }
              ]
            },
            {
              "id": "CVE-2020-27815",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "medium",
                  "type": "Ubuntu"
                }
              ]
            },
            {
              "id": "CVE-2020-28588",
              "severity": [
                {
                  "score": "CVSS:3.0/AV:L/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N",
                  "type": "CVSS_V3"
                },
                {
                  "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N",
                  "type": "CVSS_V3"
                },
                {
                  "score": "medium",
                  "type": "Ubuntu"
                }
              ]
            },
            {
              "id": "CVE-2020-28915",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:P/AC:L/PR:H/UI:N/S:U/C:L/I:H/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "medium",
                  "type": "Ubuntu"
                }
              ]
            },
            {
              "id": "CVE-2020-29368",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "medium",
                  "type": "Ubuntu"
                }
              ]
            },
            {
              "id": "CVE-2020-29369",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "medium",
                  "type": "Ubuntu"
                }
              ]
            },
            {
              "id": "CVE-2020-29371",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N",
                  "type": "CVSS_V3"
                },
                {
                  "score": "medium",
                  "type": "Ubuntu"
                }
              ]
            },
            {
              "id": "CVE-2020-29660",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:N",
                  "type": "CVSS_V3"
                },
                {
                  "score": "medium",
                  "type": "Ubuntu"
                }
              ]
            },
            {
              "id": "CVE-2020-29661",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "high",
                  "type": "Ubuntu"
                }
              ]
            },
            {
              "id": "CVE-2020-35508",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:L",
                  "type": "CVSS_V3"
                },
                {
                  "score": "low",
                  "type": "Ubuntu"
                }
              ]
            }
          ],
          "ecosystem": "Ubuntu:20.04:LTS"
        }
      },
      "ecosystem_specific": {
        "availability": "No subscription required",
        "binaries": [
          {
            "binary_name": "linux-buildinfo-5.6.0-1048-oem",
            "binary_version": "5.6.0-1048.52"
          },
          {
            "binary_name": "linux-headers-5.6.0-1048-oem",
            "binary_version": "5.6.0-1048.52"
          },
          {
            "binary_name": "linux-image-unsigned-5.6.0-1048-oem",
            "binary_version": "5.6.0-1048.52"
          },
          {
            "binary_name": "linux-modules-5.6.0-1048-oem",
            "binary_version": "5.6.0-1048.52"
          },
          {
            "binary_name": "linux-oem-5.6-headers-5.6.0-1048",
            "binary_version": "5.6.0-1048.52"
          },
          {
            "binary_name": "linux-oem-5.6-tools-5.6.0-1048",
            "binary_version": "5.6.0-1048.52"
          },
          {
            "binary_name": "linux-oem-5.6-tools-host",
            "binary_version": "5.6.0-1048.52"
          },
          {
            "binary_name": "linux-tools-5.6.0-1048-oem",
            "binary_version": "5.6.0-1048.52"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:20.04:LTS",
        "name": "linux-oem-5.6",
        "purl": "pkg:deb/ubuntu/linux-oem-5.6@5.6.0-1048.52?arch=source\u0026distro=focal"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "5.6.0-1048.52"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "5.6.0-1007.7",
        "5.6.0-1008.8",
        "5.6.0-1010.10",
        "5.6.0-1011.11",
        "5.6.0-1013.13",
        "5.6.0-1017.17",
        "5.6.0-1018.18",
        "5.6.0-1020.20",
        "5.6.0-1021.21",
        "5.6.0-1023.23",
        "5.6.0-1026.26",
        "5.6.0-1027.27",
        "5.6.0-1028.28",
        "5.6.0-1031.32",
        "5.6.0-1032.33",
        "5.6.0-1033.35",
        "5.6.0-1034.36",
        "5.6.0-1035.37",
        "5.6.0-1036.39",
        "5.6.0-1039.43",
        "5.6.0-1042.46",
        "5.6.0-1047.51"
      ]
    }
  ],
  "aliases": [],
  "details": "Daniele Antonioli, Nils Ole Tippenhauer, and Kasper Rasmussen discovered\nthat legacy pairing and secure-connections pairing authentication in the\nBluetooth protocol could allow an unauthenticated user to complete\nauthentication without pairing credentials via adjacent access. A\nphysically proximate attacker could use this to impersonate a previously\npaired Bluetooth device. (CVE-2020-10135)\n\nJay Shin discovered that the ext4 file system implementation in the Linux\nkernel did not properly handle directory access with broken indexing,\nleading to an out-of-bounds read vulnerability. A local attacker could use\nthis to cause a denial of service (system crash). (CVE-2020-14314)\n\nIt was discovered that the block layer implementation in the Linux kernel\ndid not properly perform reference counting in some situations, leading to\na use-after-free vulnerability. A local attacker could use this to cause a\ndenial of service (system crash). (CVE-2020-15436)\n\nIt was discovered that the serial port driver in the Linux kernel did not\nproperly initialize a pointer in some situations. A local attacker could\npossibly use this to cause a denial of service (system crash).\n(CVE-2020-15437)\n\nAndy Nguyen discovered that the Bluetooth HCI event packet parser in the\nLinux kernel did not properly handle event advertisements of certain sizes,\nleading to a heap-based buffer overflow. A physically proximate remote\nattacker could use this to cause a denial of service (system crash) or\npossibly execute arbitrary code. (CVE-2020-24490)\n\nIt was discovered that the NFS client implementation in the Linux kernel\ndid not properly perform bounds checking before copying security labels in\nsome situations. A local attacker could use this to cause a denial of\nservice (system crash) or possibly execute arbitrary code. (CVE-2020-25212)\n\nIt was discovered that the Rados block device (rbd) driver in the Linux\nkernel did not properly perform privilege checks for access to rbd devices\nin some situations. A local attacker could use this to map or unmap rbd\nblock devices. (CVE-2020-25284)\n\nIt was discovered that the block layer subsystem in the Linux kernel did\nnot properly handle zero-length requests. A local attacker could use this\nto cause a denial of service. (CVE-2020-25641)\n\nIt was discovered that the HDLC PPP implementation in the Linux kernel did\nnot properly validate input in some situations. A local attacker could use\nthis to cause a denial of service (system crash) or possibly execute\narbitrary code. (CVE-2020-25643)\n\nKiyin (\u5c39\u4eae) discovered that the perf subsystem in the Linux kernel did\nnot properly deallocate memory in some situations. A privileged attacker\ncould use this to cause a denial of service (kernel memory exhaustion).\n(CVE-2020-25704)\n\nIt was discovered that the KVM hypervisor in the Linux kernel did not\nproperly handle interrupts in certain situations. A local attacker in a\nguest VM could possibly use this to cause a denial of service (host system\ncrash). (CVE-2020-27152)\n\nIt was discovered that the jfs file system implementation in the Linux\nkernel contained an out-of-bounds read vulnerability. A local attacker\ncould use this to possibly cause a denial of service (system crash).\n(CVE-2020-27815)\n\nIt was discovered that an information leak existed in the syscall\nimplementation in the Linux kernel on 32 bit systems. A local attacker\ncould use this to expose sensitive information (kernel memory).\n(CVE-2020-28588)\n\nIt was discovered that the framebuffer implementation in the Linux kernel\ndid not properly perform range checks in certain situations. A local\nattacker could use this to expose sensitive information (kernel memory).\n(CVE-2020-28915)\n\nJann Horn discovered a race condition in the copy-on-write implementation\nin the Linux kernel when handling hugepages. A local attacker could use\nthis to gain unintended write access to read-only memory pages.\n(CVE-2020-29368)\n\nJann Horn discovered that the mmap implementation in the Linux kernel\ncontained a race condition when handling munmap() operations, leading to a\nread-after-free vulnerability. A local attacker could use this to cause a\ndenial of service (system crash) or possibly expose sensitive information.\n(CVE-2020-29369)\n\nJann Horn discovered that the romfs file system in the Linux kernel did not\nproperly validate file system meta-data, leading to an out-of-bounds read.\nAn attacker could use this to construct a malicious romfs image that, when\nmounted, exposed sensitive information (kernel memory). (CVE-2020-29371)\n\nJann Horn discovered that the tty subsystem of the Linux kernel did not use\nconsistent locking in some situations, leading to a read-after-free\nvulnerability. A local attacker could use this to cause a denial of service\n(system crash) or possibly expose sensitive information (kernel memory).\n(CVE-2020-29660)\n\nJann Horn discovered a race condition in the tty subsystem of the Linux\nkernel in the locking for the TIOCSPGRP ioctl(), leading to a use-after-\nfree vulnerability. A local attacker could use this to cause a denial of\nservice (system crash) or possibly execute arbitrary code. (CVE-2020-29661)\n\nIt was discovered that a race condition existed that caused the Linux\nkernel to not properly restrict exit signal delivery. A local attacker\ncould possibly use this to send signals to arbitrary processes.\n(CVE-2020-35508)\n",
  "id": "USN-4752-1",
  "modified": "2026-06-03T10:45:24Z",
  "published": "2021-02-25T06:54:20Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://ubuntu.com/security/notices/USN-4752-1"
    },
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2020-10135"
    },
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2020-14314"
    },
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2020-15436"
    },
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2020-15437"
    },
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2020-24490"
    },
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2020-25212"
    },
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2020-25284"
    },
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2020-25641"
    },
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2020-25643"
    },
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2020-25704"
    },
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2020-27152"
    },
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2020-27815"
    },
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2020-28588"
    },
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2020-28915"
    },
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2020-29368"
    },
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2020-29369"
    },
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2020-29371"
    },
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2020-29660"
    },
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2020-29661"
    },
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2020-35508"
    }
  ],
  "related": [],
  "schema_version": "1.7.0",
  "summary": "linux-oem-5.6 vulnerabilities",
  "upstream": [
    "UBUNTU-CVE-2020-10135",
    "UBUNTU-CVE-2020-14314",
    "UBUNTU-CVE-2020-15436",
    "UBUNTU-CVE-2020-15437",
    "UBUNTU-CVE-2020-24490",
    "UBUNTU-CVE-2020-25212",
    "UBUNTU-CVE-2020-25284",
    "UBUNTU-CVE-2020-25641",
    "UBUNTU-CVE-2020-25643",
    "UBUNTU-CVE-2020-25704",
    "UBUNTU-CVE-2020-27152",
    "UBUNTU-CVE-2020-27815",
    "UBUNTU-CVE-2020-28588",
    "UBUNTU-CVE-2020-28915",
    "UBUNTU-CVE-2020-29368",
    "UBUNTU-CVE-2020-29369",
    "UBUNTU-CVE-2020-29371",
    "UBUNTU-CVE-2020-29660",
    "UBUNTU-CVE-2020-29661",
    "UBUNTU-CVE-2020-35508"
  ]
}



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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

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Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


Detection rules are retrieved from Rulezet.