certfr_avis - CERTFR-2021-AVI-228

CERTFR-2021-AVI-228

Vulnerability from certfr_avis - Published: - Updated:

Une vulnérabilité a été découverte dans Xen. Elle permet à un attaquant de provoquer un déni de service.

Solution

Se référer au bulletin de sécurité de l'éditeur pour l'obtention des correctifs (cf. section Documentation).

None

Impacted products

	Vendor	Product	Description
	XEN	Xen	Xen avec le patch XSA-365

References

Title

Publication Time

CVE-2021-28688 (GCVE-0-2021-28688)

Vulnerability from cvelistv5 – Published: 2021-04-06 18:07 – Updated: 2024-08-03 21:47

Summary

The fix for XSA-365 includes initialization of pointers such that subsequent cleanup code wouldn't use uninitialized or stale values. This initialization went too far and may under certain conditions also overwrite pointers which are in need of cleaning up. The lack of cleanup would result in leaking persistent grants. The leak in turn would prevent fully cleaning up after a respective guest has died, leaving around zombie domains. All Linux versions having the fix for XSA-365 applied are vulnerable. XSA-365 was classified to affect versions back to at least 3.11.

Severity ?

No CVSS data available.

CWE

unknown

Assigner

XEN

References

URL

Tags

	https://xenbits.xenproject.org/xsa/advisory-371.txt	x_refsource_MISC
	https://lists.debian.org/debian-lts-announce/2021…	mailing-listx_refsource_MLIST
	https://lists.debian.org/debian-lts-announce/2021…	mailing-listx_refsource_MLIST

Impacted products

Vendor

Product

Version

Linux

Unknown: unspecified , < 4.12 (custom)
Affected: 3.11 , < unspecified (custom)
Unaffected: next of 4.3 , < unspecified (custom)

Linux	Linux	Affected: 5.11.1
Linux	Linux	Affected: 5.12-rc
Linux	Linux	Affected: 5.10.18
Linux	Linux	Unknown: unspecified , < 4.12 (custom) Unknown: 4.4 , < unspecified (custom) Unaffected: next of 5.9 , < unspecified (custom)

Credits

{'credit_data': {'description': {'description_data': [{'lang': 'eng', 'value': 'This issue was discovered by Nicolai Stange of SUSE.'}]}}}

Show details on NVD website

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Sightings

Author	Source	Type	Date

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

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