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CVE-2023-20240

MEDIUMCVSS 5.5/10EPSS 0.20%

Last modified

CVE-2023-20240 is a medium-severity vulnerability rated 5.5/10 on the CVSS scale. 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. EPSS estimates a 0.20% chance of exploitation in the next 30 days.

Description

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.

Metrics

CVSS 3.1
5.5/10

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

EPSS Probability
0.20%

9.6th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

VendorProductVersions
CiscoAnyconnect Secure Mobility Client4.9.00086
CiscoAnyconnect Secure Mobility Client4.9.01095
CiscoAnyconnect Secure Mobility Client4.9.02028
CiscoAnyconnect Secure Mobility Client4.9.03047
CiscoAnyconnect Secure Mobility Client4.9.03049
CiscoAnyconnect Secure Mobility Client4.9.04043
CiscoAnyconnect Secure Mobility Client4.9.04053
CiscoAnyconnect Secure Mobility Client4.9.05042
CiscoAnyconnect Secure Mobility Client4.9.06037
CiscoSecure Client4.10.00093
CiscoSecure Client4.10.01075
CiscoSecure Client4.10.02086
CiscoSecure Client4.10.03104
CiscoSecure Client4.10.04065
CiscoSecure Client4.10.04071
CiscoSecure Client4.10.05085
CiscoSecure Client4.10.05095
CiscoSecure Client4.10.05111
CiscoSecure Client4.10.06079
CiscoSecure Client4.10.06090
CiscoSecure Client4.10.07061
CiscoSecure Client4.10.07062
CiscoSecure Client4.10.07073
CiscoSecure Client5.0.00238
CiscoSecure Client5.0.00529
CiscoSecure Client5.0.00556
CiscoSecure Client5.0.01242
CiscoSecure Client5.0.02075
CiscoSecure Client5.0.03072
CiscoSecure Client5.0.03076

References

Timeline

Published
Last Modified
Status
Modified

Frequently Asked Questions

What is CVE-2023-20240?
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.
How severe is CVE-2023-20240?
CVE-2023-20240 has a CVSS score of 5.5/10 (MEDIUM severity). The EPSS model estimates a 0.20% probability of exploitation in the next 30 days.
How do I fix CVE-2023-20240?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2023-20240?

Run a free Strix scan to check your systems for this vulnerability.

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Source: NVD / NIST