Citigroup revealed Wednesday that hackers gained access to the account information of significantly more customers than originally thought. In an updated news release issued Wednesday, the nation's third-largest bank said that after completing an investigation, it concluded that 360,083 accounts were compromised in the attack, in which hackers infiltrated Citibank's online banking platform, Citi Account Online, and viewed customer account numbers and contact information, including email addresses. Additional data that would be needed to commit fraud, such as expiration dates or card security codes, was not exposed. Citigroup originally reported that 210,000 account holders were affected.
Included in the exposed dataset labeled "PDL" were individuals' full names, email addresses, phone numbers, location data, professional summaries, and skills, as well as education and employment histories.
Attackers could leverage the issue — which impacts Nexus 3000, 7000, and 9000 series switches with vulnerable NX-OS versions with DHCPv6 activated and are in standalone NX-OS mode — to facilitate continuous crashes of the dhcp_snoop process and a denial-of-service condition.
Higher rewards of up to $250,000 will be given by Google for the discovery of memory corruption flaws in the Chrome browser shown to achieve remote code execution using a non-sandboxed process as part of a more robust vulnerability reward program.