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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

Author Source Type Date Other

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.


Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.