CVE-2024-20260 (GCVE-0-2024-20260)
Vulnerability from cvelistv5
Published
2024-10-23 17:07
Modified
2026-09-16 20:12
Severity ?
VLAI Severity ?
EPSS score ?
CWE
- CWE-789 - Memory Allocation with Excessive Size Value
Summary
Update for September 16, 2026: The original 1.0 version of this advisory was specific to the Cisco Adaptive Security Virtual Appliance (ASAv) and Cisco Secure Firewall Threat Defense Virtual (FTDv) models. However, it was later found that this vulnerability affects all Cisco Secure Firewall Adaptive Security Appliance (ASA) Software and Cisco Secure Firewall Threat Defense (FTD) Software platforms.
A vulnerability in the VPN and management web servers of the Cisco Secure Firewall ASA Software and Cisco Secure FTD Software platforms could allow an unauthenticated, remote attacker to cause an affected device to run out of system memory or buffer blocks, which in turn could cause SSL VPN connection processing to slow down and eventually cease altogether.
This vulnerability is due to a lack of proper memory management for new incoming SSL/TLS connections. An attacker could exploit this vulnerability by sending a large number of new incoming SSL/TLS connections to the targeted device. A successful exploit could allow the attacker to deplete system memory or buffers, resulting in a denial of service (DoS) condition. The memory or buffers could be reclaimed slowly if the attack traffic is stopped, but a manual reload may be required to restore operations quickly.
References
Impacted products
| Vendor | Product | Version | |||||||
|---|---|---|---|---|---|---|---|---|---|
| Cisco | Cisco Secure Firewall Adaptive Security Appliance (ASA) Software |
Version: 9.16.1 Version: 9.16.1.28 Version: 9.16.2 Version: 9.16.2.3 Version: 9.16.2.7 Version: 9.16.2.11 Version: 9.16.2.13 Version: 9.16.2.14 Version: 9.16.3.3 Version: 9.16.3 Version: 9.16.3.14 Version: 9.18.1 Version: 9.16.3.15 Version: 9.18.1.3 Version: 9.18.2 Version: 9.16.3.19 Version: 9.16.3.23 Version: 9.18.2.5 Version: 9.16.4 Version: 9.18.2.7 Version: 9.19.1 Version: 9.16.4.9 Version: 9.18.2.8 Version: 9.16.4.14 Version: 9.18.3 Version: 9.19.1.5 Version: 9.16.4.18 Version: 9.19.1.9 Version: 9.18.3.39 Version: 9.16.4.19 Version: 9.19.1.12 Version: 9.18.3.46 Version: 9.16.4.27 Version: 9.19.1.18 Version: 9.18.3.53 Version: 9.18.3.55 Version: 9.16.4.38 Version: 9.16.4.39 Version: 9.18.3.56 Version: 9.20.1 Version: 9.16.4.42 Version: 9.19.1.22 Version: 9.18.4 Version: 9.20.1.5 Version: 9.18.4.5 Version: 9.19.1.24 Version: 9.16.4.48 Version: 9.18.4.8 Version: 9.20.2 Version: 9.19.1.27 Version: 9.16.4.55 Version: 9.18.4.22 Version: 9.20.2.10 Version: 9.16.4.57 Version: 9.19.1.28 Version: 9.18.4.24 Version: 9.20.2.21 Version: 9.16.4.61 Version: 9.19.1.31 Version: 9.18.4.29 Version: 9.20.2.22 Version: 9.16.4.62 Version: 9.18.4.34 Version: 9.20.3 Version: 9.16.4.67 Version: 9.16.4.70 Version: 9.18.4.40 Version: 9.23.1 Version: 9.22.1.1 Version: 9.16.4.71 Version: 9.20.3.4 Version: 9.18.4.47 Version: 9.20.3.7 Version: 9.19.1.37 Version: 9.16.4.76 Version: 9.20.3.9 Version: 9.19.1.38 Version: 9.18.4.50 Version: 9.22.1.3 Version: 9.20.3.10 Version: 9.22.1.2 Version: 9.18.4.52 Version: 9.20.3.13 Version: 9.22.1.6 Version: 9.18.4.53 Version: 9.16.4.82 Version: 9.22.2 Version: 9.20.3.16 Version: 9.19.1.42 Version: 9.18.4.57 Version: 9.16.4.84 Version: 9.23.1.3 Version: 9.20.3.20 Version: 9.22.2.4 Version: 9.23.1.7 Version: 9.20.4 Version: 9.22.2.9 Version: 9.23.1.13 Version: 9.20.4.7 Version: 9.22.2.13 Version: 9.18.4.66 Version: 9.20.4.10 Version: 9.23.1.19 Version: 9.16.4.85 Version: 9.22.2.14 Version: 9.18.4.67 Version: 9.18.4.68 Version: 9.23.1.22 Version: 9.20.4.14 Version: 9.22.2.20 Version: 9.20.4.19 Version: 9.16.4.89 Version: 9.16.4.92 |
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],
"descriptions": [
{
"lang": "en",
"value": "Update for September 16, 2026: The original 1.0 version of this advisory was specific to the Cisco Adaptive Security Virtual Appliance (ASAv) and Cisco Secure Firewall Threat Defense Virtual (FTDv) models. However, it was later found that this vulnerability affects all Cisco Secure Firewall Adaptive Security Appliance (ASA) Software and Cisco Secure Firewall Threat Defense (FTD) Software platforms.\r\n\r\nA vulnerability in the VPN and management web servers of the Cisco Secure Firewall ASA Software and Cisco Secure FTD Software platforms could allow an unauthenticated, remote attacker to cause an affected device to run out of system memory or buffer blocks, which in turn could cause SSL VPN connection processing to slow down and eventually cease altogether.\r\nThis vulnerability is due to a lack of proper memory management for new incoming SSL/TLS connections. An attacker could exploit this vulnerability by sending a large number of new incoming SSL/TLS connections to the targeted device. A successful exploit could allow the attacker to deplete system memory or buffers, resulting in a denial of service (DoS) condition. The memory or buffers could be reclaimed slowly if the attack traffic is stopped, but a manual reload may be required to restore operations quickly."
}
],
"exploits": [
{
"lang": "en",
"value": "The Cisco Product Security Incident Response Team (PSIRT) is not aware of any public announcements or malicious use of the vulnerability that is described in this advisory."
}
],
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"attackVector": "NETWORK",
"availabilityImpact": "HIGH",
"baseScore": 8.6,
"baseSeverity": "HIGH",
"confidentialityImpact": "NONE",
"integrityImpact": "NONE",
"privilegesRequired": "NONE",
"scope": "CHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H",
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"description": "Memory Allocation with Excessive Size Value",
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}
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},
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}
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\"version\": \"7.0.8.1\"}, {\"status\": \"affected\", \"version\": \"7.6.2.1\"}, {\"status\": \"affected\", \"version\": \"7.7.10.1\"}, {\"status\": \"affected\", \"version\": \"7.4.2.4\"}, {\"status\": \"affected\", \"version\": \"7.2.10.2\"}, {\"status\": \"affected\", \"version\": \"7.4.3\"}, {\"status\": \"affected\", \"version\": \"7.6.4\"}, {\"status\": \"affected\", \"version\": \"7.0.9\"}], \"defaultStatus\": \"unknown\"}], \"exploits\": [{\"lang\": \"en\", \"value\": \"The Cisco Product Security Incident Response Team (PSIRT) is not aware of any public announcements or malicious use of the vulnerability that is described in this advisory.\"}], \"references\": [{\"url\": \"https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-asaftdvirtual-dos-MuenGnYR\", \"name\": \"cisco-sa-asaftdvirtual-dos-MuenGnYR\"}], \"descriptions\": [{\"lang\": \"en\", \"value\": \"Update for September 16, 2026: The original 1.0 version of this advisory was specific to the Cisco Adaptive Security Virtual Appliance (ASAv) and Cisco Secure Firewall Threat Defense Virtual (FTDv) models. However, it was later found that this vulnerability affects all Cisco Secure Firewall Adaptive Security Appliance (ASA) Software and Cisco Secure Firewall Threat Defense (FTD) Software platforms.\\r\\n\\r\\nA vulnerability in the VPN and management web servers of the Cisco Secure Firewall ASA Software and Cisco Secure FTD Software platforms could allow an unauthenticated, remote attacker to cause an affected device to run out of system memory or buffer blocks, which in turn could cause SSL VPN connection processing to slow down and eventually cease altogether.\\r\\nThis vulnerability is due to a lack of proper memory management for new incoming SSL/TLS connections. An attacker could exploit this vulnerability by sending a large number of new incoming SSL/TLS connections to the targeted device. A successful exploit could allow the attacker to deplete system memory or buffers, resulting in a denial of service (DoS) condition. The memory or buffers could be reclaimed slowly if the attack traffic is stopped, but a manual reload may be required to restore operations quickly.\"}], \"problemTypes\": [{\"descriptions\": [{\"lang\": \"en\", \"type\": \"cwe\", \"cweId\": \"CWE-789\", \"description\": \"Memory Allocation with Excessive Size Value\"}]}], \"providerMetadata\": {\"orgId\": \"d1c1063e-7a18-46af-9102-31f8928bc633\", \"shortName\": \"cisco\", \"dateUpdated\": \"2026-09-16T20:12:00.669Z\"}}}",
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"dataType": "CVE_RECORD",
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}
}
}
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Sightings
| Author | Source | Type | Date |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
- Confirmed: The vulnerability is confirmed from an analyst perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
- Patched: This vulnerability was successfully patched by the user reporting the sighting.
- Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
- Not confirmed: The user expresses doubt about the veracity of the vulnerability.
- Not patched: This vulnerability was not successfully patched by the user reporting the sighting.
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