CVE-2023-20046

HIGH

8.8

CVSS Score

Published: May 9, 2023 at 01:06 PM UTC

Updated: June 17, 2026 at 05:29 AM UTC

7 products affected across 1 vendorStarosAsr 5000Asr 5500

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Severity

HIGH8.8

Exploit prediction

EPSS 2%

Description

A vulnerability in the key-based SSH authentication feature of Cisco StarOS Software could allow an authenticated, remote attacker to elevate privileges on an affected device. This vulnerability is due to insufficient validation of user-supplied credentials. An attacker could exploit this vulnerability by sending a valid low-privileged SSH key to an affected device from a host that has an IP address that is configured as the source for a high-privileged user account. A successful exploit could allow the attacker to log in to the affected device through SSH as a high-privileged user. There are workarounds that address this vulnerability.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Staros · Cisco

95%

v < 21.22.1421.23.0 ≤ v < 21.23.3121.25.0 ≤ v < 21.25.1521.26.0 ≤ v < 21.26.1721.27.0 ≤ v < 21.27.621.28.0 ≤ v < 21.28.321.11.0 21.11.1 21.11.10 21.11.11 21.11.12 21.11.13 21.11.14 21.11.15 21.11.16 21.11.17 21.11.18 21.11.19 21.11.2 21.11.20 21.11.21 21.11.3 21.11.4 21.11.5 21.11.6 21.11.7 21.11.8 21.11.9 21.12.0 21.12.1 21.12.10 21.12.11 21.12.12 21.12.13 21.12.14 21.12.15 21.12.16 21.12.17 21.12.18 21.12.19 21.12.2 21.12.20 21.12.21 21.12.22 21.12.3 21.12.4 21.12.5 21.12.6 21.12.7 21.12.8 21.12.9 21.13.0 21.13.1 21.13.10 21.13.11 21.13.12 21.13.13 21.13.14 21.13.15 21.13.16 21.13.17 21.13.18 21.13.19 21.13.2 21.13.20 21.13.21 21.13.3 21.13.4 21.13.5 21.13.6 21.13.7 21.13.8 21.13.9 21.14.0 21.14.1 21.14.10 21.14.11 21.14.12 21.14.16 21.14.17 21.14.19 21.14.2 21.14.20 21.14.22 21.14.23 21.14.3 21.14.4 21.14.5 21.14.6 21.14.7 21.14.8 21.14.9 21.14.b12 21.14.b13 21.14.b14 21.14.b15 21.14.b17 21.14.b18 21.14.b19 21.14.b20 21.14.b21 21.14.b22 21.15.0 21.15.1 21.15.10 21.15.11 21.15.12 21.15.13 21.15.14 21.15.15 21.15.16 21.15.17 21.15.18 21.15.19 21.15.2 21.15.20 21.15.21 21.15.22 21.15.24 21.15.25 21.15.26 21.15.27 21.15.28 21.15.29 21.15.3 21.15.30 21.15.32 21.15.33 21.15.36 21.15.37 21.15.39 21.15.4 21.15.40 21.15.41 21.15.43 21.15.45 21.15.46 21.15.47 21.15.48 21.15.5 21.15.51 21.15.52 21.15.53 21.15.54 21.15.55 21.15.57 21.15.58 21.15.59 21.15.6 21.15.60 21.15.7 21.15.8 21.16.10 21.16.2 21.16.3 21.16.4 21.16.5 21.16.6 21.16.7 21.16.8 21.16.9 21.16.c10 21.16.c11 21.16.c12 21.16.c13 21.16.c14 21.16.c15 21.16.c16 21.16.c17 21.16.c18 21.16.c19 21.16.c9 21.16.d0 21.16.d1 21.17.0 21.17.1 21.17.10 21.17.11 21.17.12 21.17.13 21.17.14 21.17.15 21.17.16 21.17.17 21.17.18 21.17.19 21.17.2 21.17.3 21.17.4 21.17.5 21.17.6 21.17.7 21.17.8 21.17.9 21.18.0 21.18.1 21.18.11 21.18.12 21.18.13 21.18.14 21.18.15 21.18.16 21.18.17 21.18.18 21.18.19 21.18.2 21.18.20 21.18.21 21.18.22 21.18.23 21.18.24 21.18.25 21.18.26 21.18.3 21.18.4 21.18.5 21.18.6 21.18.7 21.18.8 21.18.9 21.19.0 21.19.1 21.19.10 21.19.11 21.19.2 21.19.3 21.19.4 21.19.5 21.19.6 21.19.7 21.19.8 21.19.9 21.19.n10 21.19.n11 21.19.n12 21.19.n13 21.19.n14 21.19.n15 21.19.n16 21.19.n17 21.19.n18 21.19.n2 21.19.n3 21.19.n4 21.19.n5 21.19.n6 21.19.n7 21.19.n8 21.19.n9 21.20.0 21.20.1 21.20.10 21.20.11 21.20.12 21.20.13 21.20.14 21.20.15 21.20.16 21.20.17 21.20.18 21.20.19 21.20.2 21.20.20 21.20.21 21.20.22 21.20.23 21.20.24 21.20.25 21.20.26 21.20.27 21.20.28 21.20.29 21.20.3 21.20.30 21.20.31 21.20.32 21.20.33 21.20.34 21.20.35 21.20.4 21.20.5 21.20.6 21.20.7 21.20.8 21.20.9 21.20.SV1 21.20.SV2 21.20.SV3 21.20.SV5 21.20.c22 21.20.k6 21.20.k7 21.20.k8 21.20.p9 21.20.u8 21.21.0 21.21.1 21.21.2 21.21.3 21.21.KS2 21.22.0 21.22.11 21.22.12 21.22.13 21.22.3 21.22.4 21.22.5 21.22.6 21.22.7 21.22.8 21.22.n10 21.22.n11 21.22.n12 21.22.n13 21.22.n2 21.22.n3 21.22.n4 21.22.n5 21.22.n6 21.22.n7 21.22.n8 21.22.n9 21.22.ua0 21.22.ua2 21.22.ua3 21.22.ua5 21.22.uj3 21.23.0 21.23.1 21.23.10 21.23.11 21.23.12 21.23.13 21.23.14 21.23.15 21.23.16 21.23.17 21.23.18 21.23.19 21.23.2 21.23.21 21.23.22 21.23.23 21.23.24 21.23.25 21.23.26 21.23.27 21.23.29 21.23.3 21.23.30 21.23.4 21.23.5 21.23.6 21.23.7 21.23.8 21.23.9 21.23.b2 21.23.b3 21.23.c16 21.23.c17 21.23.c18 21.23.n 21.23.n10 21.23.n11 21.23.n6 21.23.n7 21.23.n8 21.23.n9 21.23.yn14 21.24 21.24.0 21.24.1 21.24.2 21.24.3 21.25.0 21.25.10 21.25.11 21.25.12 21.25.13 21.25.14 21.25.3 21.25.4 21.25.5 21.25.6 21.25.7 21.25.8 21.25.9 21.26.0 21.26.1 21.26.10 21.26.13 21.26.14 21.26.15 21.26.17 21.26.3 21.26.5 21.26.6 21.26.7 21.27.0 21.27.1 21.27.2 21.27.3 21.27.4 21.27.5 21.27.m 21.27.m0 21.28.0 21.28.1 21.28.2 21.28.m 21.28.m0 21.28.m1 21.28.m2 21.28.m3

Affected range stops below 21.22.14, so it looks safe — our inference, not a vendor statement

Affected range stops below 21.23.31, so it looks safe — our inference, not a vendor statement

Affected range stops below 21.25.15, so it looks safe — our inference, not a vendor statement

Affected range stops below 21.26.17, so it looks safe — our inference, not a vendor statement

Affected range stops below 21.27.6, so it looks safe — our inference, not a vendor statement

Affected range stops below 21.28.3, so it looks safe — our inference, not a vendor statement

cisco-asr-5000 (environment) · cisco-asr-5500 (environment) · cisco-asr-5700 (environment) · cisco-vpc-di (environment) · cisco-vpc-si (environment)

Ultra Cloud Core User Plane Function · Cisco

60%

All versions

Asr 5000 · Ciscodevice

80%

All versions

Asr 5500 · Ciscodevice

80%

All versions

Asr 5700 · Ciscodevice

80%

All versions

Vpc-Di · Ciscodevice

80%

All versions

Vpc-Si · Ciscodevice

80%

All versions

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references

https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-staros-ssh-privesc-BmWeJC3h

References (1)

Vendor Advisory

Source: [email protected]

https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-staros-ssh-privesc-BmWeJC3h

CVSS

8.8HIGHcisco

Attack Vector: NETWORK
Complexity: LOW
Privileges: LOW
User Interaction: NONE
Scope: UNCHANGED
Confidentiality: HIGH
Integrity: HIGH
Availability: HIGH

Vector?

Quick Info

StatusMODIFIED

CWE

CWE-289CWE-522

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