CVE-2021-28691
CVSS V2 Medium 4.6
CVSS V3 High 7.8
Description
Guest triggered use-after-free in Linux xen-netback A malicious or buggy network PV frontend can force Linux netback to disable the interface and terminate the receive kernel thread associated with queue 0 in response to the frontend sending a malformed packet. Such kernel thread termination will lead to a use-after-free in Linux netback when the backend is destroyed, as the kernel thread associated with queue 0 will have already exited and thus the call to kthread_stop will be performed against a stale pointer.
Overview
- CVE ID
- CVE-2021-28691
- Assigner
- security@xen.org
- Vulnerability Status
- Analyzed
- Published Version
- 2021-06-29T12:15:08
- Last Modified Date
- 2022-04-06T16:46:42
Weakness Enumerations
CPE Configuration (Product)
| CPE | Vulnerable | Operator | Version Start | Version End |
|---|---|---|---|---|
| AND | ||||
| cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* | 1 | OR | 5.5.0 | 5.12.2 |
| AND | ||||
| cpe:2.3:a:netapp:cloud_backup:-:*:*:*:*:*:*:* | 1 | OR | ||
| AND | ||||
| cpe:2.3:o:netapp:h410c_firmware:-:*:*:*:*:*:*:* | 1 | OR | ||
| cpe:2.3:h:netapp:h410c:-:*:*:*:*:*:*:* | 0 | OR | ||
| AND | ||||
| cpe:2.3:o:netapp:h300s_firmware:-:*:*:*:*:*:*:* | 1 | OR | ||
| cpe:2.3:h:netapp:h300s:-:*:*:*:*:*:*:* | 0 | OR | ||
| AND | ||||
| cpe:2.3:o:netapp:h500s_firmware:-:*:*:*:*:*:*:* | 1 | OR | ||
| cpe:2.3:h:netapp:h500s:-:*:*:*:*:*:*:* | 0 | OR | ||
| AND | ||||
| cpe:2.3:o:netapp:h700s_firmware:-:*:*:*:*:*:*:* | 1 | OR | ||
| cpe:2.3:h:netapp:h700s:-:*:*:*:*:*:*:* | 0 | OR | ||
| AND | ||||
| cpe:2.3:o:netapp:h300e_firmware:-:*:*:*:*:*:*:* | 1 | OR | ||
| cpe:2.3:h:netapp:h300e:-:*:*:*:*:*:*:* | 0 | OR | ||
| AND | ||||
| cpe:2.3:o:netapp:h500e_firmware:-:*:*:*:*:*:*:* | 1 | OR | ||
| cpe:2.3:h:netapp:h500e:-:*:*:*:*:*:*:* | 0 | OR | ||
| AND | ||||
| cpe:2.3:o:netapp:h700e_firmware:-:*:*:*:*:*:*:* | 1 | OR | ||
| cpe:2.3:h:netapp:h700e:-:*:*:*:*:*:*:* | 0 | OR | ||
| AND | ||||
| cpe:2.3:o:netapp:h410s_firmware:-:*:*:*:*:*:*:* | 1 | OR | ||
| cpe:2.3:h:netapp:h410s:-:*:*:*:*:*:*:* | 0 | OR |
CVSS Version 2
- Version
- 2.0
- Vector String
- AV:L/AC:L/Au:N/C:P/I:P/A:P
- Access Vector
- LOCAL
- Access Compatibility
- LOW
- Authentication
- NONE
- Confidentiality Impact
- PARTIAL
- Integrity Impact
- PARTIAL
- Availability Impact
- PARTIAL
- Base Score
- 4.6
- Severity
- MEDIUM
- Exploitability Score
- 3.9
- Impact Score
- 6.4
CVSS Version 3
- Version
- 3.1
- Vector String
- CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- Attack Vector
- LOCAL
- Attack Compatibility
- LOW
- Privileges Required
- LOW
- User Interaction
- NONE
- Scope
- UNCHANGED
- Confidentiality Impact
- HIGH
- Availability Impact
- HIGH
- Base Score
- 7.8
- Base Severity
- HIGH
- Exploitability Score
- 1.8
- Impact Score
- 5.9
References
| Reference URL | Reference Tags |
|---|---|
| https://xenbits.xenproject.org/xsa/advisory-374.txt | Third Party Advisory |
| https://security.gentoo.org/glsa/202107-30 | Third Party Advisory |
| https://security.netapp.com/advisory/ntap-20210805-0002/ | Third Party Advisory |
Sources
| Source Name | Source URL |
|---|---|
| NIST | https://nvd.nist.gov/vuln/detail/CVE-2021-28691 |
| MITRE | https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-28691 |
History
| Created | Old Value | New Value | Data Type | Notes |
|---|---|---|---|---|
| 2022-05-10 06:29:29 | Added to TrackCVE | |||
| 2022-12-05 05:09:16 | 2021-06-29T12:15Z | 2021-06-29T12:15:08 | CVE Published Date | updated |
| 2022-12-05 05:09:16 | 2022-04-06T16:46:42 | CVE Modified Date | updated | |
| 2022-12-05 05:09:16 | Analyzed | Vulnerability Status | updated |