CVE-2021-3444high
New! CVE Severity Now Using CVSS v3
The calculated severity for CVEs has been updated to use CVSS v3 by default. CVEs that do not have a CVSS v3 score will fall back CVSS v2 for calculating severity. Severity display preferences can be toggled in the settings dropdown.
Description
The bpf verifier in the Linux kernel did not properly handle mod32 destination register truncation when the source register was known to be 0. A local attacker with the ability to load bpf programs could use this gain out-of-bounds reads in kernel memory leading to information disclosure (kernel memory), and possibly out-of-bounds writes that could potentially lead to code execution. This issue was addressed in the upstream kernel in commit 9b00f1b78809 ("bpf: Fix truncation handling for mod32 dst reg wrt zero") and in Linux stable kernels 5.11.2, 5.10.19, and 5.4.101.
References
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=9b00f1b78809
https://www.openwall.com/lists/oss-security/2021/03/23/2
http://www.openwall.com/lists/oss-security/2021/03/23/2
http://packetstormsecurity.com/files/162117/Kernel-Live-Patch-Security-Notice-LSN-0075-1.html
https://security.netapp.com/advisory/ntap-20210416-0006/
https://lists.debian.org/debian-lts-announce/2021/10/msg00010.html
http://packetstormsecurity.com/files/164950/Kernel-Live-Patch-Security-Notice-LSN-0082-1.html
Details
Source: MITRE
Published: 2021-03-23
Updated: 2021-12-02
Type: CWE-125
Risk Information
CVSS v2
Base Score: 4.6
Vector: AV:L/AC:L/Au:N/C:P/I:P/A:P
Impact Score: 6.4
Exploitability Score: 3.9
Severity: MEDIUM
CVSS v3
Base Score: 7.8
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Impact Score: 5.9
Exploitability Score: 1.8
Severity: HIGH
Vulnerable Software
Configuration 1
OR
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
Configuration 2
OR
Configuration 3
OR
cpe:2.3:o:canonical:ubuntu_linux:14.04:*:*:*:esm:*:*:*
cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:lts:*:*:*
Tenable Plugins
| ID | Name | Product | Family | Severity |
|---|---|---|---|---|
| 153610 | EulerOS 2.0 SP8 : kernel (EulerOS-SA-2021-2465) | Nessus | Huawei Local Security Checks | high |
| 152313 | EulerOS 2.0 SP9 : kernel (EulerOS-SA-2021-2272) | Nessus | Huawei Local Security Checks | high |
| 152308 | EulerOS 2.0 SP9 : kernel (EulerOS-SA-2021-2246) | Nessus | Huawei Local Security Checks | high |
| 152167 | SUSE SLES15 Security Update : kernel (Live Patch 15 for SLE 15 SP2) (SUSE-SU-2021:2577-1) | Nessus | SuSE Local Security Checks | high |
| 151756 | openSUSE 15 Security Update : kernel (openSUSE-SU-2021:1977-1) | Nessus | SuSE Local Security Checks | critical |
| 151730 | openSUSE 15 Security Update : kernel (openSUSE-SU-2021:1975-1) | Nessus | SuSE Local Security Checks | critical |
| 151570 | EulerOS Virtualization 2.9.0 : kernel (EulerOS-SA-2021-2195) | Nessus | Huawei Local Security Checks | high |
| 151562 | EulerOS Virtualization 2.9.1 : kernel (EulerOS-SA-2021-2183) | Nessus | Huawei Local Security Checks | high |
| 150927 | SUSE SLES15 Security Update : kernel (SUSE-SU-2021:1975-1) | Nessus | SuSE Local Security Checks | critical |
| 150901 | SUSE SLED15 / SLES15 Security Update : kernel (SUSE-SU-2021:1977-1) | Nessus | SuSE Local Security Checks | critical |
| 149892 | openSUSE Security Update : the Linux Kernel (openSUSE-2021-758) | Nessus | SuSE Local Security Checks | critical |
| 149717 | SUSE SLES15 Security Update : kernel (SUSE-SU-2021:1624-1) | Nessus | SuSE Local Security Checks | high |
| 149491 | SUSE SLES12 Security Update : kernel (SUSE-SU-2021:1596-1) | Nessus | SuSE Local Security Checks | high |
| 149487 | SUSE SLES12 Security Update : kernel (SUSE-SU-2021:1595-1) | Nessus | SuSE Local Security Checks | high |
| 149462 | SUSE SLES15 Security Update : kernel (SUSE-SU-2021:1573-1) | Nessus | SuSE Local Security Checks | high |
| 149456 | SUSE SLES12 Security Update : kernel (SUSE-SU-2021:1572-1) | Nessus | SuSE Local Security Checks | high |
| 149283 | Photon OS 3.0: Linux PHSA-2021-3.0-0229 | Nessus | PhotonOS Local Security Checks | high |
| 148747 | SUSE SLED15 / SLES15 Security Update : kernel (SUSE-SU-2021:1238-1) | Nessus | SuSE Local Security Checks | critical |
| 148700 | SUSE SLES12 Security Update : kernel (SUSE-SU-2021:1210-1) | Nessus | SuSE Local Security Checks | high |
| 148698 | SUSE SLES15 Security Update : kernel (SUSE-SU-2021:1211-1) | Nessus | SuSE Local Security Checks | critical |
| 148509 | SUSE SLES12 Security Update : kernel (SUSE-SU-2021:1175-1) | Nessus | SuSE Local Security Checks | medium |
| 148459 | Oracle Linux 7 / 8 : Unbreakable Enterprise kernel (ELSA-2021-9140) | Nessus | Oracle Linux Local Security Checks | high |
| 148458 | Oracle Linux 7 / 8 : Unbreakable Enterprise kernel-container (ELSA-2021-9141) | Nessus | Oracle Linux Local Security Checks | high |
| 148438 | openSUSE Security Update : the Linux Kernel (openSUSE-2021-532) | Nessus | SuSE Local Security Checks | critical |
| 148350 | Photon OS 4.0: Linux PHSA-2021-4.0-0007 | Nessus | PhotonOS Local Security Checks | high |
| 148034 | Ubuntu 18.04 LTS / 20.04 LTS / 20.10 : Linux kernel vulnerabilities (USN-4887-1) | Nessus | Ubuntu Local Security Checks | high |