HomeNews & updatesWordPress warning: 140k BackupBuddy installations on alert over file-read exploitation - The...

WordPress warning: 140k BackupBuddy installations on alert over file-read exploitation – The Daily Swig

Cyber Warfare
Russia is ‘failing’ in its mission to destabilize Ukraine’s networks
Hacker-powered security
Human error bugs increasingly making a splash, study indicates
In focus
Software supply chain attacks – everything you need to know
Special report
Inaugural report outlines strengths and weaknesses exposed by momentous security flaw
Chromium site isolation bypass
Flaw that opened the door to cookie modification and data theft resolved
Bug Bounty Radar
The latest programs for June 2022
Cybersecurity conferences
A schedule of events in 2022 and beyond
Site backup plugin developer issues patch following reports of millions of exploit attempts
WordPress warning: 140k BackupBuddy installations on alert over file-read exploitation
UPDATED WordPress websites running BackupBuddy have been urged to update the plugin amid reports of active exploitation of a high severity arbitrary file download/read vulnerability.
BackupBuddy, which is used to backup WordPress sites, and has around 140,000 active installations.
WordPress security firm Wordfence has revealed that its firewall has blocked more than 4.9 million exploit attempts related to the flaw since abuse was first detected on August 26.
The issue – tracked as CVE-2022-31474 with a CVSS score of 7.5 – enables unauthenticated attackers to download sensitive files from vulnerable sites.
Read more of the latest WordPress security news
A majority of observed attacks apparently attempted to read /etc/passwd, /wp-config.php, .my.cnf, or .accesshash files, which could be leveraged to further compromise victims, said Wordfence.
The vulnerability affects versions between 8.5.8.0 and 8.7.4.1, and was patched in version 8.7.5. 
iThemes, the plugin developer, told The Daily Swig that the bug was patched on September 2, not on September 6 as Wordfence (and therefore this article too) initially stated, within hours of being “notified of suspicious activity related to a BackupBuddy installation”.
It continued: “We have made this security update available to all vulnerable BackupBuddy versions (8.5.8 – 8.7.4.1), regardless of licensing status, so no one continues to run a vulnerable version of the BackupBuddy plugin.
“We recommend that customers follow the steps outlined in the disclosure post to detect if their site was attacked. Our support team is standing by to help if anyone needs help or assistance from the iThemes Help Desk.”
The vulnerability arose from an insecure implementation of the mechanism used to download locally stored files, meaning unauthenticated attackers could download any file stored on the server.
“More specifically the plugin registers an admin_init hook for the function intended to download local back-up files and the function itself did not have any capability checks nor any nonce validation,” according to a Wordfence blog post published on September 6.
“This means that the function could be triggered via any administrative page, including those that can be called without authentication (admin-post.php), making it possible for unauthenticated users to call the function. The back-up path is not validated and therefore an arbitrary file could be supplied and subsequently downloaded.”
Sysadmins can find signs of exploitation by “checking for the ‘local-download’ and/or the ‘local-destination-id’ parameter value when reviewing requests in your access logs,” said Wordfence.
“Presence of these parameters along with a full path to a file or the presence of ../../ to a file indicates the site may have been targeted for exploitation by this vulnerability. If the site is compromised, this can suggest that the BackupBuddy plugin was likely the source of compromise.”
iThemes concluded: “This incident, like many others experienced by other vendors in the past, underscores how security-aware WordPress users have become. WordPress as a whole has become a much more secure platform thanks to the commitment of vendors, users, and security researchers to make security easier for everyone, and iThemes is proud to be an integral part of that.”
This article was updated on September 8 with comment from iThemes
YOU MIGHT ALSO LIKE A rough guide to launching a career in cybersecurity
Adam Bannister
@Ad_Nauseum74
Burp Suite
Vulnerabilities
Customers
Company
Insights
© 2022 PortSwigger Ltd.

source

- Advertisment -


Most Popular

- Advertisment -