5.5 Medium
CVSS3
Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
1.7 Low
CVSS2
Access Vector
LOCAL
Access Complexity
LOW
Authentication
SINGLE
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
PARTIAL
AV:L/AC:L/Au:S/C:N/I:N/A:P
0.0004 Low
EPSS
Percentile
13.3%
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.
Author | Note |
---|---|
mdeslaur | hypervisor packages are in universe. For issues in the hypervisor, add appropriate tags to each section, ex: Tags_xen: universe-binary |
www.openwall.com/lists/oss-security/2022/11/01/10
xenbits.xen.org/xsa/advisory-420.html
launchpad.net/bugs/cve/CVE-2022-42324
nvd.nist.gov/vuln/detail/CVE-2022-42324
security-tracker.debian.org/tracker/CVE-2022-42324
www.cve.org/CVERecord?id=CVE-2022-42324
xenbits.xen.org/xsa/advisory-420.html
xenbits.xenproject.org/xsa/advisory-420.txt
5.5 Medium
CVSS3
Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
1.7 Low
CVSS2
Access Vector
LOCAL
Access Complexity
LOW
Authentication
SINGLE
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
PARTIAL
AV:L/AC:L/Au:S/C:N/I:N/A:P
0.0004 Low
EPSS
Percentile
13.3%