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CVE-2021-33909
CVE information
Published
Last Modified
CVSSv2.0 Severity
CVSSv3.1 Severity
Impact Analysis
Description
fs/seq_file.c in the Linux kernel 3.16 through 5.13.x before 5.13.4 does not properly restrict seq buffer allocations, leading to an integer overflow, an Out-of-bounds Write, and escalation to root by an unprivileged user, aka CID-8cae8cd89f05..
CVSSv2.0 Score
- Severity
- High
- Base Score
- 7.2/10
- Exploit Score
- 3.9/10
- Access Vector
- Local
- Access Complexity
- Low
- Authentication Required
- None
- Impact Score
- 10/10
- Confidentiality Impact
- Complete
- Availability Impact
- Complete
- Integrity Impact
- Complete
CVSSv3.1 Score
- Severity
- High
- Base Score
- 7.8/10
- Exploit Score
- 1.8/10
- Access Vector
- Local
- Access Complexity
- Low
- Privileges Required
- Low
- Impact Score
- 5.9/10
- Confidentiality Impact
- High
- Availability Impact
- High
- Integrity Impact
- High
- Scope
- Unchanged
- User Interaction
- None
Products Affected
CPE | Affected | Vulnerable | Excluding | Edit |
---|---|---|---|---|
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* |
Yes
|
5.5 | 5.10.52 | |
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* |
Yes
|
5.11 | 5.12.19 | |
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* |
Yes
|
5.13 | 5.13.4 | |
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* |
Yes
|
3.12.43 | 3.13 | |
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* |
Yes
|
3.16 | 4.4.276 | |
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* |
Yes
|
4.5 | 4.9.276 | |
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* |
Yes
|
4.10 | 4.14.240 | |
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* |
Yes
|
4.15 | 4.19.198 | |
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* |
Yes
|
4.20 | 5.4.134 | |
cpe:2.3:o:fedoraproject:fedora:34:*:*:*:*:*:*:* |
Yes
|
- | - | |
cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:* |
Yes
|
- | - | |
cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:* |
Yes
|
- | - | |
cpe:2.3:a:netapp:solidfire:-:*:*:*:*:*:*:* |
Yes
|
- | - | |
cpe:2.3:a:netapp:hci_management_node:-:*:*:*:*:*:*:* |
Yes
|
- | - | |
cpe:2.3:a:oracle:communications_session_border_controller:8. |
Yes
|
- | - | |
cpe:2.3:a:oracle:communications_session_border_controller:8. |
Yes
|
- | - | |
cpe:2.3:a:oracle:communications_session_border_controller:9. |
Yes
|
- | - | |
cpe:2.3:a:oracle:communications_session_border_controller:8. |
Yes
|
- | - |
References
- https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.13.4
- https://github.com/torvalds/linux/commit/8cae8cd89f05f6de223d63e6d15e31c8ba9cf53b
- https://www.openwall.com/lists/oss-security/2021/07/20/1
- https://lists.debian.org/debian-lts-announce/2021/07/msg00016.html
- https://lists.debian.org/debian-lts-announce/2021/07/msg00015.html
- https://lists.debian.org/debian-lts-announce/2021/07/msg00014.html
- https://www.debian.org/security/2021/dsa-4941
- http://packetstormsecurity.com/files/163621/Sequoia-A-Deep-Root-In-Linuxs-Filesystem-Lay
- http://www.openwall.com/lists/oss-security/2021/07/22/7
- http://packetstormsecurity.com/files/163671/Kernel-Live-Patch-Security-Notice-LSN-0079-1
- https://security.netapp.com/advisory/ntap-20210819-0004/
- http://www.openwall.com/lists/oss-security/2021/08/25/10
- http://packetstormsecurity.com/files/164155/Kernel-Live-Patch-Security-Notice-LSN-0081-1
- http://www.openwall.com/lists/oss-security/2021/09/17/2
- http://www.openwall.com/lists/oss-security/2021/09/17/4
- http://www.openwall.com/lists/oss-security/2021/09/21/1
- http://packetstormsecurity.com/files/165477/Kernel-Live-Patch-Security-Notice-LSN-0083-1
- https://www.oracle.com/security-alerts/cpujan2022.html
- https://psirt.global.sonicwall.com/vuln-detail/SNWLID-2022-0015
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org