Cisco Bug: CSCuq86376 - X509SubjectNameMaxLength too small causes phone unable to register
Feb 26, 2019
- Cisco Unified Communications Manager (CallManager)
Known Affected Releases
Symptoms: A vulnerability in the Remote Mobile Access Subsystem in the Cisco Unified Communication Manager (CUCM) could allow an unauthenticated, remote attacker to supply a crafted TLS certificate that may be accepted by the affected device. The vulnerability is due to improper validation of the SAN field of a TLS certificate. An attacker could exploit this vulnerability by impersonating a VCS Core device and supplying a certificate signed by a certificate authority trusted by the CUCM, but containing crafted values within the SAN field. Conditions: An affected product with the default configuration running an affected version of software.
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Bug Details Include
- Full Description (including symptoms, conditions and workarounds)
- Known Fixed Releases
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