Medium severity · published Aug 14, 2018
CVE-2018-0131
A vulnerability in the implementation of RSA-encrypted nonces in Cisco IOS Software and Cisco IOS XE Software could allow an unauthenticated, remote attacker to obtain the…
5.9
CVSS
1.7%
EPSS
No
On KEV
Description
A vulnerability in the implementation of RSA-encrypted nonces in Cisco IOS Software and Cisco IOS XE Software could allow an unauthenticated, remote attacker to obtain the encrypted nonces of an Internet Key Exchange Version 1 (IKEv1) session. The vulnerability exists because the affected software responds incorrectly to decryption failures. An attacker could exploit this vulnerability sending crafted ciphertexts to a device configured with IKEv1 that uses RSA-encrypted nonces. A successful exploit could allow the attacker to obtain the encrypted nonces. Cisco Bug IDs: CSCve77140.
CVSS vector
CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N
Attack vector
Network
Complexity
High
Privileges
None
User interaction
None
Confidentiality
High
Integrity
None
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)1.7% · higher than 77% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
IX
IOS XE · Cisco
15.5(3)s · source: NVD
IA
IOS and IOS XE · Cisco Systems, Inc.
All versions, or not specified · source: vendor
IO
Ios · Cisco
15.5(3)s · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2018-0131
CVE.org
https://www.cve.org/CVERecord?id=CVE-2018-0131
Third Party Advisory
http://www.securityfocus.com/bid/105074
Third Party Advisory
http://www.securitytracker.com/id/1041539
Vendor Advisory
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20180813-rsa-nonce
More from IOS XE
10.0
CVE-2023-20198
Cisco IOS XE Web UI Privilege Escalation Vulnerability
9.8
CVE-2018-0151
Cisco IOS Software and Cisco IOS XE Software Quality of Service Remote Code Execution Vulnerability
9.8
CVE-2017-3881
Cisco IOS and IOS XE Remote Code Execution Vulnerability
8.8
CVE-2018-0167
Cisco IOS, XR, and XE Software Buffer Overflow Vulnerability
8.8
CVE-2017-6738
Cisco IOS and IOS XE Software SNMP Remote Code Execution Vulnerability