Medium severity · published Oct 6, 2021
CVE-2021-34711
Cisco IP Phone Software Arbitrary File Read Vulnerability
5.5
CVSS
0.3%
EPSS
No
On KEV
Description
A vulnerability in the debug shell of Cisco IP Phone software could allow an authenticated, local attacker to read any file on the device file system. This vulnerability is due to insufficient input validation. An attacker could exploit this vulnerability by providing crafted input to a debug shell command. A successful exploit could allow the attacker to read any file on the device file system.
CVSS vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
Attack vector
Local
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
High
Integrity
None
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.3% · higher than 19% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
CI
Cisco IP Phones with Multiplatform Firmware · Cisco
All versions, or not specified · source: vendor
IC
IP Conference Phone 7832 Firmware · Cisco
before 14.1\(1\) · source: NVD
IC
IP Conference Phone 8832 Firmware · Cisco
before 14.1\(1\) · source: NVD
IP
IP Phone 7811 Firmware · Cisco
before 14.1\(1\) · source: NVD
IP
IP Phone 7821 Firmware · Cisco
before 14.1\(1\) · source: NVD
IP
IP Phone 7832 Firmware · Cisco
before 14.1\(1\) · source: NVD
IP
IP Phone 7841 Firmware · Cisco
before 14.1\(1\) · source: NVD
IP
IP Phone 7861 Firmware · Cisco
before 14.1\(1\) · source: NVD
IP
IP Phone 8811 Firmware · Cisco
before 14.1\(1\) · source: NVD
IP
IP Phone 8831 Firmware · Cisco
before 14.1\(1\) · source: NVD
IP
IP Phone 8841 Firmware · Cisco
before 14.1\(1\) · source: NVD
IP
IP Phone 8845 Firmware · Cisco
before 14.1\(1\) · source: NVD
Affected product
CI
Cisco IP Phones with Multiplatform Firmware
Cisco
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2021-34711
CVE.org
https://www.cve.org/CVERecord?id=CVE-2021-34711
Vendor Advisory
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-ipphone-arbfileread-NPdtE2Ow
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