CVE-2020-29485
First published: Tue Dec 15 2020(Updated: )
An issue was discovered in Xen 4.6 through 4.14.x. When acting upon a guest XS_RESET_WATCHES request, not all tracking information is freed. A guest can cause unbounded memory usage in oxenstored. This can lead to a system-wide DoS. Only systems using the Ocaml Xenstored implementation are vulnerable. Systems using the C Xenstored implementation are not vulnerable.
Credit: cve@mitre.org
| Affected Software | Affected Version | How to fix |
|---|---|---|
| debian/xen | 4.11.4+107-gef32c7afa2-1 4.14.6-1 4.14.5+94-ge49571868d-1 4.17.1+2-gb773c48e36-1 4.17.2+55-g0b56bed864-1 | |
| Xen xen-unstable | >=4.6.0<=4.14.0 | |
| Debian | =10.0 | |
| Fedora | =32 | |
| Fedora | =33 |
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Reference Links
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/2C6M6S3CIMEBACH6O7V4H2VDANMO6TVA/
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/OBLV6L6Q24PPQ2CRFXDX4Q76KU776GKI/
- https://www.debian.org/security/2020/dsa-4812
- https://xenbits.xenproject.org/xsa/advisory-330.txt
- https://xenbits.xen.org/xsa/advisory-330.html
- https://security-tracker.debian.org/tracker/CVE-2020-29485
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/OBLV6L6Q24PPQ2CRFXDX4Q76KU776GKI/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/2C6M6S3CIMEBACH6O7V4H2VDANMO6TVA/
Frequently Asked Questions
What is the severity of CVE-2020-29485?
CVE-2020-29485 is classified as a high severity vulnerability due to its potential to cause unbounded memory usage leading to a denial of service.
How do I fix CVE-2020-29485?
To remediate CVE-2020-29485, upgrade to a fixed version of Xen such as 4.11.4+107-gef32c7afa2-1 or higher.
Which systems are affected by CVE-2020-29485?
CVE-2020-29485 affects systems using the Ocaml Xenstored implementation in Xen versions 4.6 through 4.14.x.
What are the potential impacts of CVE-2020-29485?
The impact of CVE-2020-29485 includes the possibility of a system-wide denial of service due to excessive memory consumption.
When was CVE-2020-29485 published?
CVE-2020-29485 was published on December 1, 2020.
- collector/security-tracker-debian
- agent/type
- collector/mitre-cve
- source/MITRE
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- collector/nvd-index
- agent/software-canonical-lookup-request
- package-manager/debian
- vendor/xen
- canonical/xen xen-unstable
- version/xen xen-unstable/4.6.0
- version/xen xen-unstable/4.14.0
- vendor/debian
- canonical/debian
- version/debian/10.0
- vendor/fedoraproject
- canonical/fedora
- version/fedora/32
- version/fedora/33