Memory buffer overflow in Cisco Firepower Management Center Virtual Appliance
CVSS score
7.5
EPSS probability
%1.4
Risk score
0.1
Published
5 y ago
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Impact on My Inventory
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Vulnerability description
DayBreach CVE AI Research
CVE-2021-34781 has vendor, distribution, patch and security-source records on file. We can compare them and prepare an explanation linked to the evidence.
A vulnerability in the processing of SSH connections for multi-instance deployments of Cisco Firepower Threat Defense (FTD) Software could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition on the affected device. This vulnerability is due to a lack of proper error handling when an SSH session fails to be established. An attacker could exploit this vulnerability by sending a high rate of crafted SSH connections to the instance. A successful exploit could allow the attacker to cause resource exhaustion, which causes a DoS condition on the affected device. The device must be manually reloaded to recover.
IMPACT: Affected Products and Software
Affected Products
The following products are affected by CVE-2021-34781 vulnerability. Where our threat engine knows the exact affected versions, they are listed below.
| ID | VENDOR | PRODUCT | ACTION |
|---|---|---|---|
| 1 | cisco | firepower management center virtual appliance | View |
| 2 | cisco | firepower management center virtual appliance | View |
| 3 | cisco | firepower management center virtual appliance | View |
| 4 | cisco | firepower management center virtual appliance | View |
| 5 | cisco | firepower management center virtual appliance | View |
| 6 | cisco | firepower management center virtual appliance | View |
| 7 | cisco | firepower management center virtual appliance | View |
| 8 | cisco | firepower management center virtual appliance | View |
| 9 | cisco | secure firewall threat defense | View |
| 10 | cisco | secure firewall threat defense | View |
| 11 | cisco | secure firewall threat defense | View |
| 12 | cisco | secure firewall threat defense | View |
| 13 | cisco | sourcefire defense center | View |
| 14 | cisco | sourcefire defense center | View |
| 15 | cisco | sourcefire defense center | View |
| 16 | cisco | sourcefire defense center | View |
| 17 | cisco | sourcefire defense center | View |
| 18 | cisco | sourcefire defense center | View |
| 19 | cisco | sourcefire defense center | View |
| 20 | cisco | sourcefire defense center | View |
RED HAT CSAF/VEX: Product Impact Check
SCORING: CVSS from Multiple Sources
CVSS Scores
The Common Vulnerability Scoring System is a standardised framework for assessing the severity of vulnerabilities in software and systems. We collect and display CVSS scores from several sources for each CVE.
| SCORE | VERSION | SEVERITY | VECTOR | SOURCE |
|---|---|---|---|---|
| 8.6 | CVSS V31 | HIGH | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H | NVD |
| 7.5 | CVSS V31 | HIGH | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H | NVD |
| 7.1 | CVSS V2 | — | AV:N/AC:M/Au:N/C:N/I:N/A:C | NVD |
Patch and Remediation Guide
Solution & Remediation Advisory
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Public exploit and active exploitation status
Verified exploit intelligence
No verified public PoC, exploit repository or Metasploit module has been found for this CVE yet.
Weakness Classification and Attack Patterns (CWE & CAPEC)
CWE - Common Weakness Enumeration
While CVE identifies specific instances of vulnerabilities, CWE categorises the common flaws or weaknesses that can lead to vulnerabilities. CVE-2021-34781 is associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification (CAPEC) stores attack patterns, which are descriptions of the common attributes and approaches employed by adversaries to exploit the CVE-2021-34781 weaknesses.
Attack Vector and Accessibility
Official Sources and Advisories
Similar Vulnerabilities
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