Ubuntu.comUB:CVE-2021-42252CVE-2021-42252
4.6 Medium
CVSS2
Attack Vector
LOCAL
Attack Complexity
LOW
Authentication
NONE
Confidentiality Impact
PARTIAL
Integrity Impact
PARTIAL
Availability Impact
PARTIAL
AV:L/AC:L/Au:N/C:P/I:P/A:P
7.8 High
CVSS3
Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
0.0004 Low
EPSS
Percentile
5.1%
An issue was discovered in aspeed_lpc_ctrl_mmap in
drivers/soc/aspeed/aspeed-lpc-ctrl.c in the Linux kernel before 5.14.6.
Local attackers able to access the Aspeed LPC control interface could
overwrite memory in the kernel and potentially execute privileges, aka
CID-b49a0e69a7b1. This occurs because a certain comparison uses values that
are not memory sizes.
Notes
| Author | Note |
|---|---|
| sbeattie | CONFIG_ASPEED_LPC_CTRL is only enabled on armhf platforms in Ubuntu |
| OS | Version | Architecture | Package | Version | Filename |
|---|---|---|---|---|---|
| ubuntu | 18.04 | noarch | linux | < 4.15.0-162.170 | UNKNOWN |
| ubuntu | 20.04 | noarch | linux | < 5.4.0-90.101 | UNKNOWN |
| ubuntu | 21.04 | noarch | linux | < 5.11.0-41.45 | UNKNOWN |
| ubuntu | 21.10 | noarch | linux | < 5.13.0-22.22 | UNKNOWN |
| ubuntu | 21.04 | noarch | linux-azure | < 5.11.0-1022.23 | UNKNOWN |
| ubuntu | 21.10 | noarch | linux-azure | < 5.13.0-1008.9 | UNKNOWN |
| ubuntu | 22.04 | noarch | linux-azure-fde | < any | UNKNOWN |
| ubuntu | 24.04 | noarch | linux-gke | < any | UNKNOWN |
| ubuntu | 22.04 | noarch | linux-gkeop | < any | UNKNOWN |
| ubuntu | 20.04 | noarch | linux-gkeop-5.15 | < any | UNKNOWN |
References
cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.14.6
git.kernel.org/linus/b49a0e69a7b1a68c8d3f64097d06dabb770fec96 (5.15-rc1)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=b49a0e69a7b1a68c8d3f64097d06dabb770fec96
launchpad.net/bugs/cve/CVE-2021-42252
nvd.nist.gov/vuln/detail/CVE-2021-42252
security-tracker.debian.org/tracker/CVE-2021-42252
ubuntu.com/security/notices/USN-5136-1
ubuntu.com/security/notices/USN-5137-1
ubuntu.com/security/notices/USN-5161-1
ubuntu.com/security/notices/USN-5162-1
www.cve.org/CVERecord?id=CVE-2021-42252
Related
4.6 Medium
CVSS2
Attack Vector
LOCAL
Attack Complexity
LOW
Authentication
NONE
Confidentiality Impact
PARTIAL
Integrity Impact
PARTIAL
Availability Impact
PARTIAL
AV:L/AC:L/Au:N/C:P/I:P/A:P
7.8 High
CVSS3
Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
0.0004 Low
EPSS
Percentile
5.1%