CVE-2022-42335
What it is
x86 shadow paging arbitrary pointer dereference In environments where host assisted address translation is necessary but Hardware Assisted Paging (HAP) is unavailable, Xen will run guests in so called shadow mode. Due to too lax a check in one of the hypervisor routines used for shadow page handling it is possible for a guest with a PCI device passed through to cause the hypervisor to access an arbitrary pointer partially under guest control.
At a glance
- Exploitability
- Can be exploited locally on the machine with a low-privilege account. High risk of data exposure, data tampering, service disruption.
- Exploit odds
- 0.3% chance of exploitation in the next 30 days (EPSS).
- Fix
- A patch, advisory or fixed version is referenced. Upgrade or apply it.
Timeline
- PublishedDisclosed publicly on CVE.org and NVD
- Last updatedMost recent change to the record
Why it ranks here
- Exploited in the wild: no, CISA does not list it.
- Exploit odds: 0.3% in the next 30 days (EPSS).
- Severity: 7.8 HIGH (CVSS).
- Fix: a patch or advisory is linked.
Details
- Published
- Last modified
- Exploit probability
- 0.3% · EPSS, next 30 days
- Weakness
- CWE-476 · NULL pointer dereference
- Record status
- Modified
Affected
- Xen 4.17.0
- Fedoraproject Fedora 38
Attack profile CVSS 3.1 · 7.8
- Attack vector
- Local
- Complexity
- Low
- Privileges needed
- Low
- User interaction
- None
- Scope
- Unchanged
- Confidentiality
- High
- Integrity
- High
- Availability
- High
Raw vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Is it in your code?
Hand this to your coding agent. It searches your project for the affected products and checks versions. Nothing leaves your machine.
Read https://cve-list.com/agent/cve/CVE-2022-42335.md and follow it. Check whether this project is affected by CVE-2022-42335. Read only. Don't change anything and don't upload my code. Tell me yes, no or not sure, with the file as proof.
Fix and advisories
- http://xenbits.xen.org/xsa/advisory-430.html
- https://xenbits.xenproject.org/xsa/advisory-430.txt
- http://xenbits.xen.org/xsa/advisory-430.html
- https://xenbits.xenproject.org/xsa/advisory-430.txt
References
- http://www.openwall.com/lists/oss-security/2023/04/25/1
- http://xenbits.xen.org/xsa/advisory-430.html
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/PSPFWSY6UOPGMADQGOGN2PAAS5LJRPTG/
- https://security.gentoo.org/glsa/202402-07
- https://xenbits.xenproject.org/xsa/advisory-430.txt
- http://www.openwall.com/lists/oss-security/2023/04/25/1
- http://xenbits.xen.org/xsa/advisory-430.html
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/PSPFWSY6UOPGMADQGOGN2PAAS5LJRPTG/
- https://security.gentoo.org/glsa/202402-07
- https://xenbits.xenproject.org/xsa/advisory-430.txt