Back to the CVE list
CVE-2021-34755

Improper input validation in Cisco Firepower Management Center Virtual Appliance

CVSS score

7.8

EPSS probability

%0.3

Risk score

0.0

Published

5 y ago

OverviewPublic Exploits (0)NewsroomVulnerability Timeline
Patch status has not yet been verified

Resmî kaynaklarda yeterli kanıt bulunamadı. Bu sonuç “yama yok” anlamına gelmez.

Impact on My Inventory

Only the personal products you have added to your account are assessed; an organisation's inventory does not appear here.

Checking session…

Vulnerability description

DayBreach CVE AI Research

CVE-2021-34755 has vendor, distribution, patch and security-source records on file. We can compare them and prepare an explanation linked to the evidence.

Multiple vulnerabilities in the CLI of Cisco Firepower Threat Defense (FTD) Software could allow an authenticated, local attacker to execute arbitrary commands with root privileges. For more information about these vulnerabilities, see the Details section of this advisory.

IMPACT: Affected Products and Software

Affected Products

The following products are affected by CVE-2021-34755 vulnerability. Where our threat engine knows the exact affected versions, they are listed below.

IDVENDORPRODUCTACTION
1ciscofirepower management center virtual appliance View
2ciscofirepower management center virtual appliance View
3ciscofirepower management center virtual appliance View
4ciscofirepower management center virtual appliance View
5ciscofirepower management center virtual appliance View
6ciscofirepower management center virtual appliance View
7ciscofirepower management center virtual appliance View
8ciscofirepower management center virtual appliance View
9ciscofirepower management center virtual appliance View
10ciscofirepower management center virtual appliance View
11ciscofirepower management center virtual appliance View
12ciscofirepower management center virtual appliance View
13ciscosecure firewall threat defense View
14ciscosecure firewall threat defense View
15ciscosecure firewall threat defense View
16ciscosecure firewall threat defense View
17ciscosourcefire defense center View
18ciscosourcefire defense center View
19ciscosourcefire defense center View
20ciscosourcefire defense center View
21ciscosourcefire defense center View
22ciscosourcefire defense center View
23ciscosourcefire defense center View
24ciscosourcefire defense center View
25ciscosourcefire defense center View
26ciscosourcefire defense center View
27ciscosourcefire defense center View
28ciscosourcefire defense center View
Total affected vendors: 1|Products: 28

RED HAT CSAF/VEX: Product Impact Check

Red Hat has not yet published a CSAF/VEX impact record for this CVE. This does not mean “not affected”.

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.

SCOREVERSIONSEVERITYVECTORSOURCE
7.8CVSS V31HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:HNVD
7.2CVSS V2—AV:L/AC:L/Au:N/C:C/I:C/A:CNVD
6.7CVSS V31MEDIUMCVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:HNVD

Patch and Remediation Guide

Solution & Remediation Advisory

Patch status unknown

İncelenen resmî kaynaklarda yama durumu doğrulanamadı. Bu sonuç “yama yok” anlamına gelmez.

Confirm the affected product and version against the source evidence above.
Restrict access to internet-facing services and apply network segmentation.
Until a patch is confirmed, follow the vendor advisory; do not read an unknown status as “no patch”.
Monitor server logs and network endpoints for signs of anomalous execution.

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-2021-34755 is associated with the following CWEs:

CWE-20: Improper Input ValidationCWE-78: Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')

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-2021-34755 weaknesses.

CAPEC-66: SQL InjectionCAPEC-126: Path TraversalCAPEC-28: OS Command Injection

Attack Vector and Accessibility

ExposureYerel erişim
PermissionsLow
UserGerekmiyor

Official Sources and Advisories

https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-ftd-cmdinject-FmzsLN8vendor-advisory

CVSS Vector Radar Chart

7.8 / 10
Attack VectorLocalComplexityLowPrivilegesLowUser Interact.NoneConfidentialityLowIntegrityNoneAvailabilityHigh

Vulnerability Scoring Details

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Attack VectorLocal
Attack ComplexityLow
Privileges RequiredLow privileges
User InteractionNone required
Confidentiality (Gizlilik)Low
Integrity (Bütünlük)None
Availability (Erişilebilirlik)High

Yama durumu bilinmiyor

İncelenen resmî kaynaklarda yama durumu doğrulanamadı. Bu sonuç “yama yok” anlamına gelmez.

Follow the vendor

C
cisco logo
cisco

Weakness Type (CWE & CAPEC)

CWE-20 CWE-78

Similar Vulnerabilities

Get this vulnerability through the API

Affected products, version ranges, exploitation status and patch information in a single request, with a free key.

Get a free keyDocumentation
curl -H "x-api-key: $DAYBREACH_API_KEY" \
  "https://api.daybreach.dev/api/v1/intel/cves/CVE-2021-34755"