Dark Reading is part of the Informa Tech Division of Informa PLC

This site is operated by a business or businesses owned by Informa PLC and all copyright resides with them.Informa PLC's registered office is 5 Howick Place, London SW1P 1WG. Registered in England and Wales. Number 8860726.

Operational Security

12/6/2018
08:05 AM
Scott Ferguson
Scott Ferguson
News Analysis-Security Now
50%
50%

Citrix: Password Reset Necessary to Stop Credential Stuffing Attack

Citrix forced users of its ShareFile tool to reset their passwords this week, following concerns that an attacker may have attempted to use credential stuffing to access accounts.

In what might seem to have been an overreaction to a recent series of data breaches, Citrix forced users of its ShareFile platform to reset their passwords over the last week to avoid an attack using credential stuffing to access accounts.

Journalist Brian Krebs first noticed the reset when Citrix customers alerted him early this week. Many users believed that the software had already been breached and that's why the company forced through the password reset over a weekend.

On Dec. 4, Citrix responded with its own blog post, noting that the password reset seemed necessary after a person or group appears to have tried to guess passwords using brute-force credential stuffing techniques.

(Source: Pixabay)
(Source: Pixabay)

Stan Black, the CISO of Citrix, wrote that the reset followed several recent and high-profile data breaches, including Marriott announcing that 500 million Starwood accounts has been accessed. (See Marriott's Due Diligence Failure Led to Massive Data Breach.)

Additionally, it appears that cybercriminals used credential stuffing to steal customer data from HSBC Bank in recent weeks. (See HSBC Data Breach Shows Failure to Protect Passwords & Access Controls.)

"Late last week, not long after new high profile security breaches were revealed, in the course of our ongoing security monitoring, we saw incidences in ShareFile that had some of the characteristics of credential stuffing," Black wrote. "After further analysis, we became very concerned that indeed perpetrators were using credentials obtained from breaches unrelated to ShareFile to attempt to gain access to individual accounts."

In his post, Black admitted that the resets happened on the weekend, which set off concerns among customers and caused some inconvenience.

ShareFile is a content collaboration and file sharing service developed by Citrix. Black added that the platform already offers a multi-factor authentication security feature and customers should use it to protect their data.

In his report, Krebs noted that Citrix did not detail a specific threat against ShareFile and that the reset seemed a bit of an overreaction, as well as a bad security practice. He referred to the National Institute of Standards and Technology (NIST), which recommends that passwords need to be reset following a specific security incident, but that routine resets should be avoided.

"But if there is evidence that the memorized secret has been compromised, such as by a breach of the verifier's hashed password database or observed fraudulent activity, subscribers should be required to change their memorized secrets," according to NIST. "However, this event-based change should occur rarely, so that they are less motivated to choose a weak secret with the knowledge that it will only be used for a limited period of time."

Related posts:

— Scott Ferguson is the managing editor of Light Reading and the editor of Security Now. Follow him on Twitter @sferguson_LR.

Comment  | 
Print  | 
More Insights
Comments
Newest First  |  Oldest First  |  Threaded View
Edge-DRsplash-10-edge-articles
I Smell a RAT! New Cybersecurity Threats for the Crypto Industry
David Trepp, Partner, IT Assurance with accounting and advisory firm BPM LLP,  7/9/2021
News
Attacks on Kaseya Servers Led to Ransomware in Less Than 2 Hours
Robert Lemos, Contributing Writer,  7/7/2021
Commentary
It's in the Game (but It Shouldn't Be)
Tal Memran, Cybersecurity Expert, CYE,  7/9/2021
Register for Dark Reading Newsletters
White Papers
Video
Cartoon
Current Issue
Enterprise Cybersecurity Plans in a Post-Pandemic World
Download the Enterprise Cybersecurity Plans in a Post-Pandemic World report to understand how security leaders are maintaining pace with pandemic-related challenges, and where there is room for improvement.
Flash Poll
Twitter Feed
Dark Reading - Bug Report
Bug Report
Enterprise Vulnerabilities
From DHS/US-CERT's National Vulnerability Database
CVE-2020-21602
PUBLISHED: 2021-09-16
libde265 v1.0.4 contains a heap buffer overflow in the put_weighted_bipred_16_fallback function, which can be exploited via a crafted a file.
CVE-2020-21603
PUBLISHED: 2021-09-16
libde265 v1.0.4 contains a heap buffer overflow in the put_qpel_0_0_fallback_16 function, which can be exploited via a crafted a file.
CVE-2020-21604
PUBLISHED: 2021-09-16
libde265 v1.0.4 contains a heap buffer overflow fault in the _mm_loadl_epi64 function, which can be exploited via a crafted a file.
CVE-2020-21605
PUBLISHED: 2021-09-16
libde265 v1.0.4 contains a segmentation fault in the apply_sao_internal function, which can be exploited via a crafted a file.
CVE-2020-21606
PUBLISHED: 2021-09-16
libde265 v1.0.4 contains a heap buffer overflow fault in the put_epel_16_fallback function, which can be exploited via a crafted a file.