VDB-124886 · CVE-2018-15374 · BID 105415

Cisco IOS XE Digital 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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5.7$0-$5k0.00

A vulnerability, which was classified as critical, has been found in Cisco IOS XE (Router Operating System) (version now known). Affected by this issue is some unknown processing of the component Digital 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. CVE summarizes:

A vulnerability in the Image Verification feature of Cisco IOS XE Software could allow an authenticated, local attacker to install a malicious software image or file on an affected device. The vulnerability is due to the affected software improperly verifying digital signatures for software images and files that are uploaded to a device. An attacker could exploit this vulnerability by uploading a malicious software image or file to an affected device. A successful exploit could allow the attacker to bypass digital signature verification checks for software images and files and install a malicious software image or file on the affected device.

The bug was discovered 09/26/2018. The weakness was released 10/05/2018 with Cisco as cisco-sa-20180926-digsig as confirmed advisory (Website). The advisory is available at tools.cisco.com. This vulnerability is handled as CVE-2018-15374 since 08/17/2018. Local access is required to approach this attack. Required for exploitation is a simple authentication. The technical details are unknown and an exploit is not available.

The vulnerability was handled as a non-public zero-day exploit for at least 9 days. During that time the estimated underground price was around $5k-$25k. The commercial vulnerability scanner Qualys is able to test this issue with plugin 316332 (Cisco IOS XE Software Digital Signature Verification Bypass Vulnerability(cisco-sa-20180926-digsig)).

Upgrading eliminates this vulnerability.

Entries connected to this vulnerability are available at 124884 and 124883.

Productinfo

Type

Vendor

Name

License

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB CVSS-B Score: 🔍
VulDB CVSS-BT Score: 🔍
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.0
VulDB Meta Temp Score: 5.9

VulDB Base Score: 5.3
VulDB Temp Score: 5.1
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 6.7
NVD Vector: 🔍

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: 🔍

Local: Yes
Remote: No

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Timelineinfo

08/17/2018 🔍
09/26/2018 +40 days 🔍
09/26/2018 +0 days 🔍
10/05/2018 +8 days 🔍
10/05/2018 +0 days 🔍
10/06/2018 +1 days 🔍
03/30/2020 +541 days 🔍

Sourcesinfo

Vendor: cisco.com

Advisory: cisco-sa-20180926-digsig
Organization: Cisco
Status: Confirmed

CVE: CVE-2018-15374 (🔍)
OVAL: 🔍

SecurityFocus: 105415 - Cisco IOS XE Software CVE-2018-15374 Local Security Bypass Vulnerability

scip Labs: https://www.scip.ch/en/?labs.20150108
See also: 🔍

Entryinfo

Created: 10/06/2018 11:04
Updated: 03/30/2020 14:49
Changes: 10/06/2018 11:04 (67), 03/30/2020 14:49 (4)
Complete: 🔍
Cache ID: 3:EF6:103

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