CVE-2021-45486: Infoleak
First published: Wed Mar 24 2021(Updated: )
An information leak flaw was found in the Linux kernel’s IPv4 implementation in the ip_rt_init in net/ipv4/route.c function. The use of a small hash table in IP ID generation allows a remote attacker to reveal sensitive information.
Credit: cve@mitre.org cve@mitre.org
| Affected Software | Affected Version | How to fix |
|---|---|---|
| redhat/kernel-rt | <0:4.18.0-372.9.1.rt7.166.el8 | 0:4.18.0-372.9.1.rt7.166.el8 |
| redhat/kernel | <0:4.18.0-372.9.1.el8 | 0:4.18.0-372.9.1.el8 |
| redhat/kernel-rt | <0:4.18.0-305.65.1.rt7.137.el8_4 | 0:4.18.0-305.65.1.rt7.137.el8_4 |
| redhat/kernel | <0:4.18.0-305.65.1.el8_4 | 0:4.18.0-305.65.1.el8_4 |
| Linux Linux kernel | <5.12.4 | |
| Oracle Communications Cloud Native Core Binding Support Function | =22.1.3 | |
| Oracle Communications Cloud Native Core Network Exposure Function | =22.1.1 | |
| Oracle Communications Cloud Native Core Policy | =22.2.0 | |
| redhat/kernel | <5.13 | 5.13 |
| debian/linux | 5.10.223-1 5.10.226-1 6.1.115-1 6.1.112-1 6.11.5-1 6.11.7-1 |
Remedy
Mitigation for this issue is either not available or the currently available options don't meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability.
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Reference Links
- https://www.cve.org/CVERecord?id=CVE-2021-45486 https://nvd.nist.gov/vuln/detail/CVE-2021-45486 https://arxiv.org/pdf/2112.09604.pdf https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/net/ipv4/route.c?id=aa6dd211e4b1dde9d5dc25d699d35f789ae7eeba
- https://bugzilla.redhat.com/show_bug.cgi?id=2039914
- https://access.redhat.com/errata/RHSA-2022:1975
- https://access.redhat.com/errata/RHSA-2022:1988
- https://access.redhat.com/errata/RHSA-2022:6991
- https://access.redhat.com/errata/RHSA-2022:6983
- https://access.redhat.com/security/cve/cve-2021-45486
- https://arxiv.org/pdf/2112.09604.pdf
- https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.12.4
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/net/ipv4/route.c?id=aa6dd211e4b1dde9d5dc25d699d35f789ae7eeba
- https://www.oracle.com/security-alerts/cpujul2022.html
- https://launchpad.net/bugs/cve/CVE-2021-45486
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=2039915
- https://git.kernel.org/linus/aa6dd211e4b1dde9d5dc25d699d35f789ae7eeba
- https://security-tracker.debian.org/tracker/CVE-2021-45486
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-45486
- https://nvd.nist.gov/vuln/detail/CVE-2021-45486
- https://ubuntu.com/security/CVE-2021-45486
Parent vulnerabilities
(Appears in the following advisories)
- collector/redhat-cve
- collector/nvd-index
- agent/type
- agent/first-publish-date
- collector/launchpad-cve
- source/Launchpad
- agent/author
- agent/weakness
- agent/severity
- collector/nvd-cve
- source/NVD
- agent/software-canonical-lookup
- collector/redhat-bugzilla
- source/Red Hat
- alias/CVE-2021-45486
- collector/mitre-cve
- source/MITRE
- agent/last-modified-date
- collector/usn-cve
- source/Ubuntu
- agent/remedy
- agent/references
- agent/softwarecombine
- agent/tags
- agent/description
- agent/event
- collector/security-tracker-debian
- source/Debian
- package-manager/redhat
- vendor/linux
- canonical/linux linux kernel
- vendor/oracle
- canonical/oracle communications cloud native core binding support function
- version/oracle communications cloud native core binding support function/22.1.3
- canonical/oracle communications cloud native core network exposure function
- version/oracle communications cloud native core network exposure function/22.1.1
- canonical/oracle communications cloud native core policy
- version/oracle communications cloud native core policy/22.2.0
- package-manager/debian