Vulnerabilities > CVE-2020-8835 - Out-of-bounds Write vulnerability in multiple products

047910
CVSS 7.8 - HIGH
Attack vector
LOCAL
Attack complexity
LOW
Privileges required
LOW
Confidentiality impact
HIGH
Integrity impact
HIGH
Availability impact
HIGH

Summary

In the Linux kernel 5.5.0 and newer, the bpf verifier (kernel/bpf/verifier.c) did not properly restrict the register bounds for 32-bit operations, leading to out-of-bounds reads and writes in kernel memory. The vulnerability also affects the Linux 5.4 stable series, starting with v5.4.7, as the introducing commit was backported to that branch. This vulnerability was fixed in 5.6.1, 5.5.14, and 5.4.29. (issue is aka ZDI-CAN-10780)

Vulnerable Configurations

Part Description Count
OS
Linux
43
OS
Fedoraproject
3
OS
Canonical
2
OS
Netapp
20
Application
Netapp
4
Hardware
Netapp
20

Common Weakness Enumeration (CWE)

Nessus

  • NASL familyFedora Local Security Checks
    NASL idFEDORA_2020-666F3B1AC3.NASL
    descriptionThe 5.5.15 stable kernel update contains a number of important fixes across the tree. Note that Tenable Network Security has extracted the preceding description block directly from the Fedora update system website. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.
    last seen2020-04-12
    modified2020-04-07
    plugin id135260
    published2020-04-07
    reporterThis script is Copyright (C) 2020 and is owned by Tenable, Inc. or an Affiliate thereof.
    sourcehttps://www.tenable.com/plugins/nessus/135260
    titleFedora 31 : kernel / kernel-headers / kernel-tools (2020-666f3b1ac3)
  • NASL familyOracle Linux Local Security Checks
    NASL idORACLELINUX_ELSA-2020-5663.NASL
    descriptionDescription of changes: [5.4.17-2011.1.2.el7uek] - ctf: discard CTF from the vDSO (Nick Alcock) [Orabug: 31194036] [5.4.17-2011.1.1.el7uek] - slcan: Don
    last seen2020-05-03
    modified2020-04-28
    plugin id136022
    published2020-04-28
    reporterThis script is Copyright (C) 2020 and is owned by Tenable, Inc. or an Affiliate thereof.
    sourcehttps://www.tenable.com/plugins/nessus/136022
    titleOracle Linux 7 / 8 : Unbreakable Enterprise kernel (ELSA-2020-5663)
  • NASL familyUbuntu Local Security Checks
    NASL idUBUNTU_USN-4313-1.NASL
    descriptionManfred Paul discovered that the bpf verifier in the Linux kernel did not properly calculate register bounds for certain operations. A local attacker could use this to expose sensitive information (kernel memory) or gain administrative privileges. Note that Tenable Network Security has extracted the preceding description block directly from the Ubuntu security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.
    last seen2020-04-12
    modified2020-03-31
    plugin id135029
    published2020-03-31
    reporterUbuntu Security Notice (C) 2020 Canonical, Inc. / NASL script (C) 2020 and is owned by Tenable, Inc. or an Affiliate thereof.
    sourcehttps://www.tenable.com/plugins/nessus/135029
    titleUbuntu 18.04 LTS / 19.10 : linux, linux-aws, linux-azure, linux-azure-5.3, linux-gcp, linux-gcp-5.3, (USN-4313-1)
  • NASL familyFedora Local Security Checks
    NASL idFEDORA_2020-73C00EDA1C.NASL
    descriptionThe 5.5.16 stable kernel update contains a number of important fixes across the tree. ---- The 5.5.15 stable kernel update contains a number of important fixes across the tree. ---- The 5.5.13 stable kernel update contains a number of important fixes across the tree. ---- The 5.5.11 stable kernel update contains a number of important fixes across the tree. Note that Tenable Network Security has extracted the preceding description block directly from the Fedora update system website. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.
    last seen2020-04-30
    modified2020-04-16
    plugin id135598
    published2020-04-16
    reporterThis script is Copyright (C) 2020 and is owned by Tenable, Inc. or an Affiliate thereof.
    sourcehttps://www.tenable.com/plugins/nessus/135598
    titleFedora 30 : kernel / kernel-headers / kernel-tools (2020-73c00eda1c)