CVE-2022-42324

Oxenstored 32->31 bit integer truncation issues Integers in Ocaml are 63 or 31 bits of signed precision. The Ocaml Xenbus library takes a C uint32_t out of the ring and casts it directly to an Ocaml integer. In 64-bit Ocaml builds this is fine, but in 32-bit builds, it truncates off the most significant bit, and then creates unsigned/signed confusion in the remainder. This in turn can feed a negative value into logic not expecting a negative value, resulting in unexpected exceptions being thrown. The unexpected exception is not handled suitably, creating a busy-loop trying (and failing) to take the bad packet out of the xenstore ring.

CVSS v3 5.5 MEDIUM

5.5^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 1.8 / Impact : 3.6

Attack Vector LOCAL

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
http://www.openwall.com/lists/oss-security/2022/11/01/10	Mailing List Patch Third Party Advisory
http://xenbits.xen.org/xsa/advisory-420.html	Patch Vendor Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/YTMITQBGC23MSDHUCAPCVGLMVXIBXQTQ/
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/YZVXG7OOOXCX6VIPEMLFDPIPUTFAYWPE/
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ZLI2NPNEH7CNJO3VZGQNOI4M4EWLNKPZ/
https://security.gentoo.org/glsa/202402-07
https://www.debian.org/security/2022/dsa-5272	Third Party Advisory
https://xenbits.xenproject.org/xsa/advisory-420.txt	Patch Vendor Advisory

Configurations

Configuration 1 (hide)

cpe:2.3:o:xen:xen:*:*:*:*:*:*:*:*

Configuration 2 (hide)

cpe:2.3:o:debian:debian_linux:11.0:*:*:*:*:*:*:*

Configuration 3 (hide)

OR	cpe:2.3:o:fedoraproject:fedora:35:::::::*
	cpe:2.3:o:fedoraproject:fedora:36:::::::*
	cpe:2.3:o:fedoraproject:fedora:37:::::::*

History

No history.

Information

Published : 2022-11-01 13:15

Updated : 2024-02-04 08:15

NVD link : CVE-2022-42324

Mitre link : CVE-2022-42324

CVE.ORG link : CVE-2022-42324

JSON object : View

Products Affected

xen

xen

fedoraproject

fedora

debian

debian_linux

CWE

CWE-681

Incorrect Conversion between Numeric Types

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