VDB-135119 · CVE-2019-1809 · BID 108375

Cisco NX-OS Image Signature Verification signature verification

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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5.8$0-$5k0.00

Summaryinfo

A vulnerability was found in Cisco NX-OS. It has been classified as critical. The affected element is an unknown function of the component Image Signature Verification. The manipulation leads to signature verification. This vulnerability is traded as CVE-2019-1809. An attack has to be approached locally. There is no exploit available.

Detailsinfo

A vulnerability, which was classified as critical, has been found in Cisco NX-OS (Router Operating System) (unknown version). This issue affects an unknown code block of the component Image Signature Verification. The manipulation with an unknown input leads to a signature verification vulnerability. Using CWE to declare the problem leads to CWE-347. The product does not verify, or incorrectly verifies, the cryptographic signature for data. Impacted is confidentiality, integrity, and availability. The summary by CVE is:

A vulnerability in the Image Signature Verification feature of Cisco NX-OS Software could allow an authenticated, local attacker with administrator-level credentials to install a malicious software patch on an affected device. The vulnerability is due to improper verification of digital signatures for patch images. An attacker could exploit this vulnerability by crafting an unsigned software patch to bypass signature checks and loading it on an affected device. A successful exploit could allow the attacker to boot a malicious software patch image.

The bug was discovered 05/15/2019. The weakness was shared 05/15/2019 as cisco-sa-20190515-nxos-psvb as confirmed advisory (Website). It is possible to read the advisory at tools.cisco.com. The identification of this vulnerability is CVE-2019-1809 since 12/06/2018. Attacking locally is a requirement. The requirement for exploitation is a simple authentication. The technical details are unknown and an exploit is not publicly available. The pricing for an exploit might be around USD $0-$5k at the moment (estimation calculated on 09/21/2023).

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

The entries VDB-135123, VDB-135122, VDB-135121 and VDB-135120 are related to this item. Be aware that VulDB is the high quality source for vulnerability data.

Productinfo

Type

Vendor

Name

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.8
VulDB Meta Temp Score: 5.8

VulDB Base Score: 4.2
VulDB Temp Score: 4.2
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 6.7
NVD Vector: 🔍

CNA Base Score: 6.4
CNA Vector (Cisco Systems, Inc.): 🔍

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Class: Signature verification
CWE: CWE-347 / CWE-345
CAPEC: 🔍
ATT&CK: 🔍

Physical: Partially
Local: Yes
Remote: No

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔍

Timelineinfo

12/06/2018 🔍
05/15/2019 +160 days 🔍
05/15/2019 +0 days 🔍
05/16/2019 +1 days 🔍
09/21/2023 +1589 days 🔍

Sourcesinfo

Vendor: cisco.com

Advisory: cisco-sa-20190515-nxos-psvb
Status: Confirmed

CVE: CVE-2019-1809 (🔍)
GCVE (CVE): GCVE-0-2019-1809
GCVE (VulDB): GCVE-100-135119
SecurityFocus: 108375

See also: 🔍

Entryinfo

Created: 05/16/2019 08:38
Updated: 09/21/2023 10:24
Changes: 05/16/2019 08:38 (58), 06/12/2020 21:10 (1), 09/21/2023 10:18 (3), 09/21/2023 10:24 (12)
Complete: 🔍
Cache ID: 216::103

Be aware that VulDB is the high quality source for vulnerability data.

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