medium
5.5
CWE
125
Advisory Published
Updated

CVE-2023-20240

First published: Wed Nov 22 2023(Updated: )

Multiple vulnerabilities in Cisco Secure Client Software, formerly AnyConnect Secure Mobility Client, could allow an authenticated, local attacker to cause a denial of service (DoS) condition on an affected system. These vulnerabilities are due to an out-of-bounds memory read from Cisco Secure Client Software. An attacker could exploit these vulnerabilities by logging in to an affected device at the same time that another user is accessing Cisco Secure Client on the same system, and then sending crafted packets to a port on that local host. A successful exploit could allow the attacker to crash the VPN Agent service, causing it to be unavailable to all users of the system. To exploit these vulnerabilities, the attacker must have valid credentials on a multi-user system.

Credit: ykramarz@cisco.com

Affected SoftwareAffected VersionHow to fix
Cisco Anyconnect Secure Mobility Client=4.9.00086
Cisco Anyconnect Secure Mobility Client=4.9.01095
Cisco Anyconnect Secure Mobility Client=4.9.02028
Cisco Anyconnect Secure Mobility Client=4.9.03047
Cisco Anyconnect Secure Mobility Client=4.9.03049
Cisco Anyconnect Secure Mobility Client=4.9.04043
Cisco Anyconnect Secure Mobility Client=4.9.04053
Cisco Anyconnect Secure Mobility Client=4.9.05042
Cisco Anyconnect Secure Mobility Client=4.9.06037
Cisco Secure Client=4.10.00093
Cisco Secure Client=4.10.01075
Cisco Secure Client=4.10.02086
Cisco Secure Client=4.10.03104
Cisco Secure Client=4.10.04065
Cisco Secure Client=4.10.04071
Cisco Secure Client=4.10.05085
Cisco Secure Client=4.10.05095
Cisco Secure Client=4.10.05111
Cisco Secure Client=4.10.06079
Cisco Secure Client=4.10.06090
Cisco Secure Client=4.10.07061
Cisco Secure Client=4.10.07062
Cisco Secure Client=4.10.07073
Cisco Secure Client=5.0.00238
Cisco Secure Client=5.0.00529
Cisco Secure Client=5.0.00556
Cisco Secure Client=5.0.01242
Cisco Secure Client=5.0.02075
Cisco Secure Client=5.0.03072
Cisco Secure Client=5.0.03076

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Reference Links

Frequently Asked Questions

  • What is the vulnerability ID for these Cisco Secure Client Software vulnerabilities?

    The vulnerability ID for these Cisco Secure Client Software vulnerabilities is CVE-2023-20240.

  • What is the severity of CVE-2023-20240?

    The severity of CVE-2023-20240 is medium with a CVSS score of 5.5.

  • Which versions of Cisco AnyConnect Secure Mobility Client are affected by CVE-2023-20240?

    Versions 4.9.00086 to 4.9.06037 of Cisco AnyConnect Secure Mobility Client are affected by CVE-2023-20240.

  • How can an attacker exploit CVE-2023-20240?

    An authenticated, local attacker can exploit CVE-2023-20240 to cause a denial of service (DoS) condition on an affected system.

  • Where can I find more information about CVE-2023-20240?

    More information about CVE-2023-20240 can be found at this link: [Cisco Security Advisory](https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-accsc-dos-9SLzkZ8)

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