Vulnerability Monitor

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CVE-2019-1859

A vulnerability in the Secure Shell (SSH) authentication process of Cisco Small Business Switches software could allow an attacker to bypass client-side certificate authentication and revert to password authentication. The vulnerability exists because OpenSSH mishandles the authentication process. An attacker could exploit this vulnerability by attempting to connect to the device via SSH. A successful exploit could allow the attacker to access the configuration as an administrative user if the default credentials are not changed. There are no workarounds available; however, if client-side certificate authentication is enabled, disable it and use strong password authentication. Client-side certificate authentication is disabled by default.

Security Impact Summary

This vulnerability carries a HIGH severity rating with a CVSS v3.1 score of 7.2, indicating it can be exploited remotely over the network with relatively low complexity without requiring user interaction . The vulnerability impacts confidentiality (data exposure), integrity (unauthorized modifications), and availability (service disruption) for affected systems. Impacting 228 products from cisco, from cisco, from cisco and 225 others, organizations running these solutions should prioritize assessment and patching.

Historical Context

First disclosed in 2019, this vulnerability was reported during a period defined by widespread IoT adoption challenges, mobile security concerns, and the emergence of advanced persistent threat (APT) techniques. Contemporary mitigation strategies focused on secure development practices and third-party component vetting.

Published

2019-05-03T17:29:01.500

Last Modified

2024-11-21T04:37:32.957

Status

Modified

Source

[email protected]

Severity

CVSSv3.1: 7.2 (HIGH)

CVSSv2 Vector

AV:N/AC:L/Au:S/C:P/I:P/A:P

  • Access Vector: NETWORK
  • Access Complexity: LOW
  • Authentication: SINGLE
  • Confidentiality Impact: PARTIAL
  • Integrity Impact: PARTIAL
  • Availability Impact: PARTIAL
Exploitability Score

8.0

Impact Score

6.4

Weaknesses
  • Type: Secondary
    CWE-285
  • Type: Primary
    CWE-295
Affected Vendors & Products
Type Vendor Product Version/Range Vulnerable?
Operating System cisco sg200-50_firmware < 1.4.10.6 Yes
Hardware cisco sg200-50 - No
Operating System cisco sg200-50p_firmware < 1.4.10.6 Yes
Hardware cisco sg200-50p - No
Operating System cisco sg200-50fp_firmware < 1.4.10.6 Yes
Hardware cisco sg200-50fp - No
Operating System cisco sg200-26_firmware < 1.4.10.6 Yes
Hardware cisco sg200-26 - No
Operating System cisco sg200-26p_firmware < 1.4.10.6 Yes
Hardware cisco sg200-26p - No
Operating System cisco sg200-26fp_firmware < 1.4.10.6 Yes
Hardware cisco sg200-26fp - No
Operating System cisco sg200-18_firmware < 1.4.10.6 Yes
Hardware cisco sg200-18 - No
Operating System cisco sg200-10fp_firmware < 1.4.10.6 Yes
Hardware cisco sg200-10fp - No
Operating System cisco sg200-08_firmware < 1.4.10.6 Yes
Hardware cisco sg200-08 - No
Operating System cisco sg200-08p_firmware < 1.4.10.6 Yes
Hardware cisco sg200-08p - No
Operating System cisco sf200-24_firmware < 1.4.10.6 Yes
Hardware cisco sf200-24 - No
Operating System cisco sf200-24p_firmware < 1.4.10.6 Yes
Hardware cisco sf200-24p - No
Operating System cisco sf200-24fp_firmware < 1.4.10.6 Yes
Hardware cisco sf200-24fp - No
Operating System cisco sf200-48_firmware < 1.4.10.6 Yes
Hardware cisco sf200-48 - No
Operating System cisco sf200-48p_firmware < 1.4.10.6 Yes
Hardware cisco sf200-48p - No
Operating System cisco sf302-08pp_firmware < 1.4.10.6 Yes
Hardware cisco sf302-08pp - No
Operating System cisco sf302-08mpp_firmware < 1.4.10.6 Yes
Hardware cisco sf302-08mpp - No
Operating System cisco sg300-10pp_firmware < 1.4.10.6 Yes
Hardware cisco sg300-10pp - No
Operating System cisco sg300-10mpp_firmware < 1.4.10.6 Yes
Hardware cisco sg300-10mpp - No
Operating System cisco sf300-24pp_firmware < 1.4.10.6 Yes
Hardware cisco sf300-24pp - No
Operating System cisco sf300-48pp_firmware < 1.4.10.6 Yes
Hardware cisco sf300-48pp - No
Operating System cisco sg300-28pp_firmware < 1.4.10.6 Yes
Hardware cisco sg300-28pp - No
Operating System cisco sf300-08_firmware < 1.4.10.6 Yes
Hardware cisco sf300-08 - No
Operating System cisco sf300-48p_firmware < 1.4.10.6 Yes
Hardware cisco sf300-48p - No
Operating System cisco sg300-10mp_firmware < 1.4.10.6 Yes
Hardware cisco sg300-10mp - No
Operating System cisco sg300-10p_firmware < 1.4.10.6 Yes
Hardware cisco sg300-10p - No
Operating System cisco sg300-10_firmware < 1.4.10.6 Yes
Hardware cisco sg300-10 - No
Operating System cisco sg300-28p_firmware < 1.4.10.6 Yes
Hardware cisco sg300-28p - No
Operating System cisco sf300-24p_firmware < 1.4.10.6 Yes
Hardware cisco sf300-24p - No
Operating System cisco sf302-08mp_firmware < 1.4.10.6 Yes
Hardware cisco sf302-08mp - No
Operating System cisco sg300-28_firmware < 1.4.10.6 Yes
Hardware cisco sg300-28 - No
Operating System cisco sf300-48_firmware < 1.4.10.6 Yes
Hardware cisco sf300-48 - No
Operating System cisco sg300-20_firmware < 1.4.10.6 Yes
Hardware cisco sg300-20 - No
Operating System cisco sf302-08p_firmware < 1.4.10.6 Yes
Hardware cisco sf302-08p - No
Operating System cisco sg300-52_firmware < 1.4.10.6 Yes
Hardware cisco sg300-52 - No
Operating System cisco sf300-24_firmware < 1.4.10.6 Yes
Hardware cisco sf300-24 - No
Operating System cisco sf302-08_firmware < 1.4.10.6 Yes
Hardware cisco sf302-08 - No
Operating System cisco sf300-24mp_firmware < 1.4.10.6 Yes
Hardware cisco sf300-24mp - No
Operating System cisco sg300-10sfp_firmware < 1.4.10.6 Yes
Hardware cisco sg300-10sfp - No
Operating System cisco sg300-28mp_firmware < 1.4.10.6 Yes
Hardware cisco sg300-28mp - No
Operating System cisco sg300-52p_firmware < 1.4.10.6 Yes
Hardware cisco sg300-52p - No
Operating System cisco sg300-52mp_firmware < 1.4.10.6 Yes
Hardware cisco sg300-52mp - No
Operating System cisco sg500-28mpp_firmware < 1.4.10.6 Yes
Hardware cisco sg500-28mpp - No
Operating System cisco sg500-52mp_firmware < 1.4.10.6 Yes
Hardware cisco sg500-52mp - No
Operating System cisco sg500xg-8f8t_firmware < 1.4.10.6 Yes
Hardware cisco sg500xg-8f8t - No
Operating System cisco sf500-24_firmware < 1.4.10.6 Yes
Hardware cisco sf500-24 - No
Operating System cisco sf500-24p_firmware < 1.4.10.6 Yes
Hardware cisco sf500-24p - No
Operating System cisco sf500-48_firmware < 1.4.10.6 Yes
Hardware cisco sf500-48 - No
Operating System cisco sf500-48p_firmware < 1.4.10.6 Yes
Hardware cisco sf500-48p - No
Operating System cisco sg500-28_firmware < 1.4.10.6 Yes
Hardware cisco sg500-28 - No
Operating System cisco sg500-28p_firmware < 1.4.10.6 Yes
Hardware cisco sg500-28p - No
Operating System cisco sg500-52_firmware < 1.4.10.6 Yes
Hardware cisco sg500-52 - No
Operating System cisco sg500-52p_firmware < 1.4.10.6 Yes
Hardware cisco sg500-52p - No
Operating System cisco sg500x-24_firmware < 1.4.10.6 Yes
Hardware cisco sg500x-24 - No
Operating System cisco sg500x-24p_firmware < 1.4.10.6 Yes
Hardware cisco sg500x-24p - No
Operating System cisco sg500x-48_firmware < 1.4.10.6 Yes
Hardware cisco sg500x-48 - No
Operating System cisco sg500x-48p_firmware < 1.4.10.6 Yes
Hardware cisco sg500x-48p - No
Operating System cisco sg250x-24_firmware < 2.5.0.78 Yes
Hardware cisco sg250x-24 - No
Operating System cisco sg250x-24p_firmware < 2.5.0.78 Yes
Hardware cisco sg250x-24p - No
Operating System cisco sg250x-48_firmware < 2.5.0.78 Yes
Hardware cisco sg250x-48 - No
Operating System cisco sg250x-48p_firmware < 2.5.0.78 Yes
Hardware cisco sg250x-48p - No
Operating System cisco sg250-08_firmware < 2.5.0.78 Yes
Hardware cisco sg250-08 - No
Operating System cisco sg250-08hp_firmware < 2.5.0.78 Yes
Hardware cisco sg250-08hp - No
Operating System cisco sg250-10p_firmware < 2.5.0.78 Yes
Hardware cisco sg250-10p - No
Operating System cisco sg250-18_firmware < 2.5.0.78 Yes
Hardware cisco sg250-18 - No
Operating System cisco sg250-26_firmware < 2.5.0.78 Yes
Hardware cisco sg250-26 - No
Operating System cisco sg250-26hp_firmware < 2.5.0.78 Yes
Hardware cisco sg250-26hp - No
Operating System cisco sg250-26p_firmware < 2.5.0.78 Yes
Hardware cisco sg250-26p - No
Operating System cisco sg250-50_firmware < 2.5.0.78 Yes
Hardware cisco sg250-50 - No
Operating System cisco sg250-50hp_firmware < 2.5.0.78 Yes
Hardware cisco sg250-50hp - No
Operating System cisco sg250-50p_firmware < 2.5.0.78 Yes
Hardware cisco sg250-50p - No
Operating System cisco sf250-24_firmware < 2.5.0.78 Yes
Hardware cisco sf250-24 - No
Operating System cisco sf250-24p_firmware < 2.5.0.78 Yes
Hardware cisco sf250-24p - No
Operating System cisco sf250-48_firmware < 2.5.0.78 Yes
Hardware cisco sf250-48 - No
Operating System cisco sf250-48hp_firmware < 2.5.0.78 Yes
Hardware cisco sf250-48hp - No
Operating System cisco sg350-10_firmware < 2.5.0.78 Yes
Hardware cisco sg350-10 - No
Operating System cisco sg350-10p_firmware < 2.5.0.78 Yes
Hardware cisco sg350-10p - No
Operating System cisco sg350-10mp_firmware < 2.5.0.78 Yes
Hardware cisco sg350-10mp - No
Operating System cisco sg355-10p_firmware < 2.5.0.78 Yes
Hardware cisco sg355-10p - No
Operating System cisco sg350-28_firmware < 2.5.0.78 Yes
Hardware cisco sg350-28 - No
Operating System cisco sg350-28p_firmware < 2.5.0.78 Yes
Hardware cisco sg350-28p - No
Operating System cisco sg350-28mp_firmware < 2.5.0.78 Yes
Hardware cisco sg350-28mp - No
Operating System cisco sf350-48_firmware < 2.5.0.78 Yes
Hardware cisco sf350-48 - No
Operating System cisco sf350-48p_firmware < 2.5.0.78 Yes
Hardware cisco sf350-48p - No
Operating System cisco sf350-48mp_firmware < 2.5.0.78 Yes
Hardware cisco sf350-48mp - No
Operating System cisco sg350xg-2f10_firmware < 2.5.0.78 Yes
Hardware cisco sg350xg-2f10 - No
Operating System cisco sg350xg-24f_firmware < 2.5.0.78 Yes
Hardware cisco sg350xg-24f - No
Operating System cisco sg350xg-24t_firmware < 2.5.0.78 Yes
Hardware cisco sg350xg-24t - No
Operating System cisco sg350xg-48t_firmware < 2.5.0.78 Yes
Hardware cisco sg350xg-48t - No
Operating System cisco sg350x-24_firmware < 2.5.0.78 Yes
Hardware cisco sg350x-24 - No
Operating System cisco sg350x-24p_firmware < 2.5.0.78 Yes
Hardware cisco sg350x-24p - No
Operating System cisco sg350x-24mp_firmware < 2.5.0.78 Yes
Hardware cisco sg350x-24mp - No
Operating System cisco sg350x-48_firmware < 2.5.0.78 Yes
Hardware cisco sg350x-48 - No
Operating System cisco sg350x-48p_firmware < 2.5.0.78 Yes
Hardware cisco sg350x-48p - No
Operating System cisco sg350x-48mp_firmware < 2.5.0.78 Yes
Hardware cisco sg350x-48mp - No
Operating System cisco sx550x-16ft_firmware < 2.5.0.78 Yes
Hardware cisco sx550x-16ft - No
Operating System cisco sx550x-24ft_firmware < 2.5.0.78 Yes
Hardware cisco sx550x-24ft - No
Operating System cisco sx550x-12f_firmware < 2.5.0.78 Yes
Hardware cisco sx550x-12f - No
Operating System cisco sx550x-24f_firmware < 2.5.0.78 Yes
Hardware cisco sx550x-24f - No
Operating System cisco sx550x-24_firmware < 2.5.0.78 Yes
Hardware cisco sx550x-24 - No
Operating System cisco sx550x-52_firmware < 2.5.0.78 Yes
Hardware cisco sx550x-52 - No
Operating System cisco sg550x-24_firmware < 2.5.0.78 Yes
Hardware cisco sg550x-24 - No
Operating System cisco sg550x-24p_firmware < 2.5.0.78 Yes
Hardware cisco sg550x-24p - No
Operating System cisco sg550x-24mp_firmware < 2.5.0.78 Yes
Hardware cisco sg550x-24mp - No
Operating System cisco sg550x-24mpp_firmware < 2.5.0.78 Yes
Hardware cisco sg550x-24mpp - No
Operating System cisco sg550x-48_firmware < 2.5.0.78 Yes
Hardware cisco sg550x-48 - No
Operating System cisco sg550x-48p_firmware < 2.5.0.78 Yes
Hardware cisco sg550x-48p - No
Operating System cisco sg550x-48mp_firmware < 2.5.0.78 Yes
Hardware cisco sg550x-48mp - No
Operating System cisco sf550x-24_firmware < 2.5.0.78 Yes
Hardware cisco sf550x-24 - No
Operating System cisco sf550x-24p_firmware < 2.5.0.78 Yes
Hardware cisco sf550x-24p - No
Operating System cisco sf550x-24mp_firmware < 2.5.0.78 Yes
Hardware cisco sf550x-24mp - No
Operating System cisco sf550x-48_firmware < 2.5.0.78 Yes
Hardware cisco sf550x-48 - No
Operating System cisco sf550x-48p_firmware < 2.5.0.78 Yes
Hardware cisco sf550x-48p - No
Operating System cisco sf550x-48mp_firmware < 2.5.0.78 Yes
Hardware cisco sf550x-48mp - No
References

How SecUtils Interprets This CVE

SecUtils normalizes and enriches National Vulnerability Database (NVD) records by standardizing vendor and product identifiers, aggregating vulnerability metadata from both NVD and MITRE sources, and providing structured context for security teams. For cisco's affected products, we extract Common Platform Enumeration (CPE) data, Common Weakness Enumeration (CWE) classifications, CVSS severity metrics, and reference data to enable rapid vulnerability prioritization and asset correlation. This record contains no exploit code, proof-of-concept instructions, or attack methodologies—only defensive intelligence necessary for patch management, risk assessment, and security operations.