Vulnerability in Cisco Nx-Os
CVE-2017-12331
A vulnerability in Cisco NX-OS System Software could allow an authenticated, local attacker to bypass signature verification when loading a software patch. The vulnerability is due to insufficient NX-OS signature verification for software patches. An authenticated, local attacker could exploit this vulnerability to bypass signature verification and load a crafted, unsigned software patch on a targeted device. The attacker would need valid administrator credentials to perform this exploit. This vulnerability affects the following products running Cisco NX-OS System Software: Multilayer Director Switches, Nexus 7000 Series Switches, Nexus 7700 Series Switches, Unified Computing System Manager. Cisco Bug IDs: CSCvf16494, CSCvf23655.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 6.7 (Medium). Vector: CVSS:3.0/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.002 (12.8th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 13th percentile — 12.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.002 · newest: 0.002 · change: 0.000
Affected products
- Cisco Nx-Os — versions 8.1(1), 8.1\(1\)
- Cisco Unified Computing System — versions 7.0\(0\)hsk\(0.357\), 7.0(0)hsk(0.357)
- Cisco Nx-Os — versions Cisco NX-OS
Weakness classification (CWE)
References
- tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20171129… (Vendor Advisory)
- www.securityfocus.com/bid/102159 (vdb-entry)
- www.securitytracker.com/id/1039930 (VDB Entry, Third Party Advisory, vdb-entry)
Frequently asked questions
- What is CVE-2017-12331?
- CVE-2017-12331 is a medium-severity vulnerability in Cisco Nx-Os, classified under Improper Verification of Cryptographic Signature. CVSS score: 6.7/10. Published 2017-11-30.
- How severe is CVE-2017-12331?
- Medium severity. CVSS v3 base score is 6.7 out of 10.