8.6

CVE-2020-3517: cisco cisco nx-os software NULL Pointer Dereference

CVSS: 8.6v3.0HighUndergoing analysis
Published 27-08-2020Last modified 13-11-2024
Open JSON

Vulnerability summary

CVE-2020-3517 is a high (CVSS 8.6) NULL Pointer Dereference vulnerability in cisco cisco nx-os software. EPSS estimates a 1.38% chance of exploitation in the next 30 days, higher than 71.7% of scored vulnerabilities.

Overall risk
35/100
0100
Medium · default modelHow is this calculated?
CVSS score
8.6/10
010
High · v3.0 (CVE.org)
EPSS score
1.38%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Timeline

  1. 27-08-2020
    PublishedVulnerability first disclosed.
  2. 13-11-2024
    Last modifiedVulnerability information updated.

Description

A vulnerability in the Cisco Fabric Services component of Cisco FXOS Software and Cisco NX-OS Software could allow an unauthenticated attacker to cause process crashes, which could result in a denial of service (DoS) condition on an affected device. The attack vector is configuration dependent and could be remote or adjacent. For more information about the attack vector, see the Details section of this advisory. The vulnerability is due to insufficient error handling when the affected software parses Cisco Fabric Services messages. An attacker could exploit this vulnerability by sending malicious Cisco Fabric Services messages to an affected device. A successful exploit could allow the attacker to cause a reload of an affected device, which could result in a DoS condition.

CVSS metrics

4 scores · 2 sources · 3 versions

EPSS trend

Probability

1.38%

Chance of exploitation in the next 30 days

Percentile

72%

Versus all other CVEs

30-day change

0.00 pp

From 1.38% on 18-09-2026

18-09-202618-10-2026
EPSS score
1.38%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Cisco3 products
  • cisco nx-os softwaren/a
  • firepower_extensible_operating_system≥ 1.1, < 1.1.4.179 | ≥ 2.0, < 2.0.1.153 | ≥ 2.1, < 2.1.1.86 | ≥ 2.2, < 2.2.1.70
  • nx-os6.0\(2\)a3\(1\) | 6.0\(2\)a3\(2\) | 6.0\(2\)a3\(4\) | 6.0\(2\)a4\(1\) | 6.0\(2\)a4\(2\) | 6.0\(2\)a4\(3\) | 6.0\(2\)a4\(4\) | 6.0\(2\)a4\(5\) | 6.0\(2\)a4\(6\) | 6.0\(2\)a6\(1\) | 6.0\(2\)a6\(1a\) | 6.0\(2\)a6\(2\) | 6.0\(2\)a6\(2a\) | 6.0\(2\)a6\(3\) | 6.0\(2\)a6\(3a\) | 6.0\(2\)a6\(4\) | 6.0\(2\)a6\(4a\) | 6.0\(2\)a6\(5\) | 6.0\(2\)a6\(5a\) | 6.0\(2\)a6\(5b\) | 6.0\(2\)a6\(6\) | 6.0\(2\)a6\(7\) | 6.0\(2\)a6\(8\) | 6.0\(2\)a7\(1\) | 6.0\(2\)a7\(1a\) | 6.0\(2\)a7\(2\) | 6.0\(2\)a7\(2a\) | 6.0\(2\)a8 | 6.0\(2\)a8\(1\) | 6.0\(2\)a8\(2\) | 6.0\(2\)a8\(3\) | 6.0\(2\)a8\(4\) | 6.0\(2\)a8\(4a\) | 6.0\(2\)a8\(5\) | 6.0\(2\)a8\(6\) | 6.0\(2\)a8\(6.213\) | 6.0\(2\)a8\(7\) | 6.0\(2\)a8\(7a\) | 6.0\(2\)a8\(7b\) | 6.0\(2\)a8\(8\) | 6.0\(2\)a8\(9\) | 6.0\(2\)a8\(9.7\) | 6.0\(2\)a8\(10\) | 6.0\(2\)a8\(10a\) | 6.0\(2\)a8\(11\) | 6.0\(2\)a8\(11a\) | 6.0\(2\)a8\(11b\) | 6.0\(2\)u2\(1\) | 6.0\(2\)u2\(2\) | 6.0\(2\)u2\(3\) | 6.0\(2\)u2\(4\) | 6.0\(2\)u2\(5\) | 6.0\(2\)u2\(6\) | 6.0\(2\)u3\(1\) | 6.0\(2\)u3\(2\) | 6.0\(2\)u3\(3\) | 6.0\(2\)u3\(4\) | 6.0\(2\)u3\(5\) | 6.0\(2\)u3\(6\) | 6.0\(2\)u3\(7\) | 6.0\(2\)u3\(8\) | 6.0\(2\)u3\(9\) | 6.0\(2\)u4\(1\) | 6.0\(2\)u4\(2\) | 6.0\(2\)u4\(3\) | 6.0\(2\)u4\(4\) | 6.0\(2\)u5\(1\) | 6.0\(2\)u5\(2\) | 6.0\(2\)u5\(3\) | 6.0\(2\)u5\(4\) | 6.0\(2\)u6 | 6.0\(2\)u6\(0.46\) | 6.0\(2\)u6\(1\) | 6.0\(2\)u6\(1a\) | 6.0\(2\)u6\(2\) | 6.0\(2\)u6\(2a\) | 6.0\(2\)u6\(3\) | 6.0\(2\)u6\(3a\) | 6.0\(2\)u6\(4\) | 6.0\(2\)u6\(4a\) | 6.0\(2\)u6\(5\) | 6.0\(2\)u6\(5a\) | 6.0\(2\)u6\(5b\) | 6.0\(2\)u6\(5c\) | 6.0\(2\)u6\(6\) | 6.0\(2\)u6\(7\) | 6.0\(2\)u6\(8\) | 6.0\(2\)u6\(9\) | 6.0\(2\)u6\(10\) | 6.0\(2\)u6\(10a\) | 6.2\(2\) | 6.2\(2a\) | 6.2\(3\) | 6.2\(3n\) | 6.2\(5\) | 6.2\(5a\) | 6.2\(6\) | 6.2\(6a\) | 6.2\(6b\) | 6.2\(7\) | 6.2\(8\) | 6.2\(8a\) | 6.2\(8b\) | 6.2\(10\) | 6.2\(11b\) | 6.2\(12\) | 6.2\(14\) | 6.2\(14a\) | 6.2\(14b\) | 6.2\(16\) | 6.2\(18\) | 6.2\(20\) | 6.2\(20a\) | 6.2\(22\) | 6.2\(24\) | 6.2\(25\) | 6.2\(27\) | 7.0\(0\)n1\(1\) | 7.0\(1\)n1\(1\) | 7.0\(2\)n1\(1\) | 7.0\(3\)f1 | 7.0\(3\)f2 | 7.0\(3\)f3 | 7.0\(3\)f3\(1\) | 7.0\(3\)f3\(2\) | 7.0\(3\)f3\(3\) | 7.0\(3\)f3\(3a\) | 7.0\(3\)f3\(3b\) | 7.0\(3\)f3\(3c\) | 7.0\(3\)f3\(4\) | 7.0\(3\)f3\(5\) | 7.0\(3\)i2\(1\) | 7.0\(3\)i2\(1a\) | 7.0\(3\)i2\(2\) | 7.0\(3\)i2\(2a\) | 7.0\(3\)i2\(2b\) | 7.0\(3\)i2\(2c\) | 7.0\(3\)i2\(2d\) | 7.0\(3\)i2\(2e\) | 7.0\(3\)i2\(2r\) | 7.0\(3\)i2\(2s\) | 7.0\(3\)i2\(2v\) | 7.0\(3\)i2\(2w\) | 7.0\(3\)i2\(2x\) | 7.0\(3\)i2\(2y\) | 7.0\(3\)i3\(1\) | 7.0\(3\)i4\(1\) | 7.0\(3\)i4\(1t\) | 7.0\(3\)i4\(2\) | 7.0\(3\)i4\(3\) | 7.0\(3\)i4\(4\) | 7.0\(3\)i4\(5\) | 7.0\(3\)i4\(6\) | 7.0\(3\)i4\(6t\) | 7.0\(3\)i4\(7\) | 7.0\(3\)i4\(8\) | 7.0\(3\)i4\(8a\) | 7.0\(3\)i4\(8b\) | 7.0\(3\)i4\(8z\) | 7.0\(3\)i4\(9\) | 7.0\(3\)i5 | 7.0\(3\)i5\(1\) | 7.0\(3\)i5\(2\) | 7.0\(3\)i5\(3\) | 7.0\(3\)i5\(3a\) | 7.0\(3\)i5\(3b\) | 7.0\(3\)i6\(1\) | 7.0\(3\)i6\(2\) | 7.0\(3\)i7 | 7.0\(3\)i7\(1\) | 7.0\(3\)i7\(2\) | 7.0\(3\)i7\(3\) | 7.0\(3\)i7\(3z\) | 7.0\(3\)i7\(4\) | 7.0\(3\)i7\(5\) | 7.0\(3\)i7\(5a\) | 7.0\(3\)i7\(6\) | 7.0\(3\)i7\(6z\) | 7.0\(3\)i7\(7\) | 7.0\(3\)i7\(8\) | 7.0\(3\)ia7\(1\) | 7.0\(3\)ia7\(2\) | 7.0\(3\)ic4\(4\) | 7.0\(3\)im3\(1\) | 7.0\(3\)im3\(2\) | 7.0\(3\)im3\(2a\) | 7.0\(3\)im3\(2b\) | 7.0\(3\)im3\(3\) | 7.0\(3\)im7\(2\) | 7.0\(3\)n1\(1\) | 7.0\(4\)n1\(1\) | 7.0\(4\)n1\(1a\) | 7.0\(5\)n1\(1\) | 7.0\(5\)n1\(1a\) | 7.0\(6\)n1\(1\) | 7.0\(6\)n1\(2s\) | 7.0\(6\)n1\(3s\) | 7.0\(6\)n1\(4s\) | 7.0\(7\)n1\(1\) | 7.0\(7\)n1\(1a\) | 7.0\(7\)n1\(1b\) | 7.0\(8\)n1\(1\) | 7.0\(8\)n1\(1a\) | 7.1\(0\)n1\(1\) | 7.1\(0\)n1\(1a\) | 7.1\(0\)n1\(1b\) | 7.1\(0.1\) | 7.1\(1\)n1\(1\) | 7.1\(1\)n1\(1a\) | 7.1\(2\)n1\(1\) | 7.1\(2\)n1\(1a\) | 7.1\(3\)n1\(1\) | 7.1\(3\)n1\(2\) | 7.1\(3\)n1\(2a\) | 7.1\(3\)n1\(3\) | 7.1\(3\)n1\(4\) | 7.1\(3\)n1\(5\) | 7.1\(4\)n1\(1\) | 7.1\(4\)n1\(1a\) | 7.1\(4\)n1\(1c\) | 7.1\(4\)n1\(1d\) | 7.1\(5\)n1\(1\) | 7.1\(5\)n1\(1b\) | 7.2\(0\)d1\(1\) | 7.2\(0\)n1\(1\) | 7.2\(1\)d\(1\) | 7.2\(1\)n1\(1\) | 7.2\(2\)d1\(1\) | 7.2\(2\)d1\(2\) | 7.2\(2\)d1\(3\) | 7.2\(2\)d1\(4\) | 7.3\(0\)d1\(1\) | 7.3\(0\)dx\(1\) | 7.3\(0\)n1\(1\) | 7.3\(0\)n1\(1a\) | 7.3\(0\)n1\(1b\) | 7.3\(1\)d1\(1\) | 7.3\(1\)n1\(1\) | 7.3\(2\)d1\(1\) | 7.3\(2\)d1\(1d\) | 7.3\(2\)d1\(2\) | 7.3\(2\)d1\(3\) | 7.3\(2\)d1\(3a\) | 7.3\(2\)n1\(1\) | 7.3\(2\)n1\(1b\) | 7.3\(2\)n1\(1c\) | 7.3\(3\)d1\(1\) | 7.3\(3\)n1\(1\) | 7.3\(4\)d1\(1\) | 7.3\(4\)n1\(1\) | 7.3\(4\)n1\(1a\) | 7.3\(5\)d1\(1\) | 7.3\(5\)n1\(1\) | 7.3\(6\)n1\(1\) | 7.3\(6\)n1\(1a\) | 7.3\(7\)n1\(1\) | 7.3\(7\)n1\(1a\) | 7.3\(7\)n1\(1b\) | 8.0\(1\) | 8.1\(1\) | 8.1\(1a\) | 8.1\(1b\) | 8.1\(2\) | 8.1\(2a\) | 8.2\(1\) | 8.2\(2\) | 8.2\(3\) | 8.2\(4\) | 8.2\(5\) | 8.3\(1\) | 8.3\(2\) | 8.4\(1\) | 8.4\(1a\) | 9.2\(1\) | 9.2\(2\) | 9.2\(2t\) | 9.2\(2v\) | 9.2\(3\) | 9.2\(3y\) | 9.3\(1\) | 9.3\(1z\) | 9.3\(2\) | 9.3\(3\) | < 3.2\(3o\) | ≥ 4.0, < 4.0\(4i\) | ≥ 4.1, < 4.1\(1c\)

1 vendor · 3 products

References

1 links