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CVE-2022-20821
CVE
Medium KEVConfirmedExploit available

A vulnerability in the health check RPM of Cisco IOS XR Software could allow an unauthenticated, remote attacker to access the Redis instan…

CVSS
6.5
Medium
EPSS
0.09
p92
Published
2022-01-01
Updated
2022-05-23
Description

A vulnerability in the health check RPM of Cisco IOS XR Software could allow an unauthenticated, remote attacker to access the Redis instance that is running within the NOSi container. This vulnerability exists because the health check RPM opens TCP port 6379 by default upon activation. An attacker could exploit this vulnerability by connecting to the Redis instance on the open port. A successful exploit could allow the attacker to write to the Redis in-memory database, write arbitrary files to the container filesystem, and retrieve information about the Redis database. Given the configuration of the sandboxed container that the Redis instance runs in, a remote attacker would be unable to execute remote code or abuse the integrity of the Cisco IOS XR Software host system.

Tags · CWE
KEVPre-authInformation disclosure
CWE-200
CAPEC-13
CAPEC-22
CAPEC-59
CAPEC-60
CAPEC-79
CAPEC-116
CAPEC-169
CAPEC-224
CAPEC-285
CAPEC-287
CAPEC-290
CAPEC-291
CAPEC-292
CAPEC-293
CAPEC-294
CAPEC-295
CAPEC-296
CAPEC-297
CAPEC-298
CAPEC-299
CAPEC-300
CAPEC-301
CAPEC-302
CAPEC-303
CAPEC-304
CAPEC-305
CAPEC-306
CAPEC-307
CAPEC-308
CAPEC-309
CAPEC-310
CAPEC-312
CAPEC-313
CAPEC-317
CAPEC-318
CAPEC-319
CAPEC-320
CAPEC-321
CAPEC-322
CAPEC-323
CAPEC-324
CAPEC-325
CAPEC-326
CAPEC-327
CAPEC-328
CAPEC-329
CAPEC-330
CAPEC-472
CAPEC-497
CAPEC-508
CAPEC-573
CAPEC-574
CAPEC-575
CAPEC-576
CAPEC-577
CAPEC-616
CAPEC-643
CAPEC-646
CAPEC-651
Affected products
Ios_xr
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N
Timeline
2022-01-01
Published
2022-05-23
Added to KEV
2022-05-23
Updated
CVSS 3.1 breakdown
Attack Vector
AV: N
Network (N)
Attack Complexity
AC: L
Low (L)
Privileges Required
PR: N
None (N)
User Interaction
UI: N
None (N)
Scope
S: U
Unchanged (U)
Confidentiality Impact
C: L
Low (L)
Integrity Impact
I: L
Low (L)
Availability Impact
A: N
None (N)
Exploit indicators
EPSS
0.088 · p92
Known exploited (KEV)
Yes
MITRE ATT&CK
Inferred via CAPEC
└ via CAPEC-574 · CWE-200
└ via CAPEC-292 · CWE-200
└ via CAPEC-577 · CWE-200
└ via CAPEC-300 · CWE-200
└ via CAPEC-309 · CWE-200
└ via CAPEC-573 · CWE-200
└ via CAPEC-576 · CWE-200
└ via CAPEC-312 · CWE-200
└ via CAPEC-497 · CWE-200
└ via CAPEC-575 · CWE-200
└ via CAPEC-646 · CWE-200
└ via CAPEC-295 · CWE-200
└ via CAPEC-60 · CWE-200
└ via CAPEC-643 · CWE-200
└ via CAPEC-169 · CWE-200
└ via CAPEC-60 · CWE-200
└ via CAPEC-13 · CWE-200
└ via CAPEC-309 · CWE-200
└ via CAPEC-169 · CWE-200
└ via CAPEC-169 · CWE-200
└ via CAPEC-576 · CWE-200
Known exploits — Сканер-ВС
CVE-2022-20821
cisa · https://www.cisa.gov/known-exploited-vulnerabilities-catalog
Enterprise
Affected software
ProductVendorStatus
ios_xr*Exploited
Source databases
CVE
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