CVE-2018-18438 : Qemu has integer overflows because IOReadHandler and its associated functions us

Qemu has integer overflows because IOReadHandler and its associated functions use a signed integer data type for a size value.

Published 2018-10-19 22:29:02

Updated 2021-08-04 17:15:36

Source MITRE

View at NVD, CVE.org

Vulnerability category: Overflow

Products affected by CVE-2018-18438

Redhat » Enterprise Linux » Version: 6.0
cpe:2.3:o:redhat:enterprise_linux:6.0:*:*:*:*:*:*:*
Matching versions
Redhat » Enterprise Linux » Version: 7.0
cpe:2.3:o:redhat:enterprise_linux:7.0:*:*:*:*:*:*:*
Matching versions
Redhat » Openstack » Version: 10
cpe:2.3:a:redhat:openstack:10:*:*:*:*:*:*:*
Matching versions
Redhat » Openstack » Version: 9
cpe:2.3:a:redhat:openstack:9:*:*:*:*:*:*:*
Matching versions
Redhat » Openstack » Version: 12
cpe:2.3:a:redhat:openstack:12:*:*:*:*:*:*:*
Matching versions
Redhat » Openstack » Version: 8
cpe:2.3:a:redhat:openstack:8:*:*:*:*:*:*:*
Matching versions
Redhat » Openstack » Version: 13
cpe:2.3:a:redhat:openstack:13:*:*:*:*:*:*:*
Matching versions
Qemu » Qemu » Version: N/A
cpe:2.3:a:qemu:qemu:-:*:*:*:*:*:*:*
Matching versions

EPSS FAQ

0.06%

Probability of exploitation activity in the next 30 days EPSS Score History

~ 23 %

Percentile, the proportion of vulnerabilities that are scored at or less

Base Score	Base Severity	CVSS Vector	Exploitability Score	Impact Score	Score Source
2.1	LOW	AV:L/AC:L/Au:N/C:N/I:N/A:P	3.9	2.9	NIST
Access Vector: Local Access Complexity: Low Authentication: None Confidentiality Impact: None Integrity Impact: None Availability Impact: Partial
5.5	MEDIUM	CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H	1.8	3.6	NIST
Attack Vector: Local Attack Complexity: Low Privileges Required: Low User Interaction: None Scope: Unchanged Confidentiality: None Integrity: None Availability: High

CWE-190 Integer Overflow or Wraparound

The product performs a calculation that can produce an integer overflow or wraparound when the logic assumes that the resulting value will always be larger than the original value. This occurs when an integer value is incremented to a value that is too large to store in the associated representation. When this occurs, the value may become a very small or negative number.

Assigned by: nvd@nist.gov (Primary)

https://lists.gnu.org/archive/html/qemu-devel/2018-10/msg02396.html

[Qemu-devel] [PATCH v2 00/11] chardev: Convert IO handlers to use unsign
Mailing List;Patch;Third Party Advisory
http://www.securityfocus.com/bid/105953

QEMU CVE-2018-18438 Local Integer Overflow Vulnerability
Third Party Advisory;VDB Entry
http://www.openwall.com/lists/oss-security/2018/10/17/3

oss-security - CVE-2018-18438 Qemu: Integer overflow in ccid_card_vscard_read() allows memory corruption
Mailing List;Third Party Advisory
https://lists.gnu.org/archive/html/qemu-devel/2018-10/msg02402.html

[Qemu-devel] [PATCH v2 07/11] chardev: Let IOReadHandler use unsigned ty
Third Party Advisory;Mailing List;Patch

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