CVE-2020-24387

An issue was discovered in the yh_create_session() function of yubihsm-shell through 2.0.2. The function does not explicitly check the returned session id from the device. An invalid session id would lead to out-of-bounds read and write operations in the session array. This could be used by an attacker to cause a denial of service attack.

CVSS v3.0 7.5 HIGH
CVSS v2.0 5.0 MEDIUM

7.5^/10

CVSS v3.0 : HIGH

Vector :

Exploitability : 3.9 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

5.0^/10

CVSS v2.0 : MEDIUM

Vector : AV:N/AC:L/Au:N/C:N/I:N/A:P

Exploitability : 10.0 / Impact : 2.9

Access Vector NETWORK

Access Complexity LOW

Authentication NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact PARTIAL

References

Link	Resource
https://www.yubico.com/support/security-advisories/ysa-2020-06/	Vendor Advisory
https://developers.yubico.com/yubihsm-shell/	Vendor Advisory
https://github.com/Yubico/yubihsm-shell	Third Party Advisory
https://blog.inhq.net/posts/yubico-libyubihsm-vuln/	Exploit Third Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/Y77KQJW76M3PFOBFLBT6DLH2NWHYRNZO/	Mailing List Third Party Advisory

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Configurations

Configuration 1 (hide)

cpe:2.3:a:yubico:yubihsm-shell:*:*:*:*:*:*:*:*

Configuration 2 (hide)

cpe:2.3:o:fedoraproject:fedora:33:*:*:*:*:*:*:*

Information

Published : 2020-10-19 13:15

Updated : 2021-07-21 04:39

NVD link : CVE-2020-24387

Mitre link : CVE-2020-24387

JSON object : View

CWE

CWE-125

Out-of-bounds Read

CWE-787

Out-of-bounds Write

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Products Affected

yubico

yubihsm-shell

fedoraproject

fedora

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