Chrome To Patch Decades-Old 'Browser History Sniffing' Flaw That Let Sites Peek At Your History

Slashdot reader king*jojo shared this article from The Register: A 23-year-old side-channel attack for spying on people's web browsing histories will get shut down in the forthcoming Chrome 136, released last Thursday to the Chrome beta channel. At least that's the hope. The privacy attack, referred to as browser history sniffing, involves reading the color values of web links on a page to see if the linked pages have been visited previously... Web publishers and third parties capable of running scripts, have used this technique to present links on a web page to a visitor and then check how the visitor's browser set the color for those links on the rendered web page... The attack was mitigated about 15 years ago, though not effectively. Other ways to check link color information beyond the getComputedStyle method were developed... Chrome 136, due to see stable channel release on April 23, 2025, "is the first major browser to render these attacks obsolete," explained Kyra Seevers, Google software engineer in a blog post. This is something of a turnabout for the Chrome team, which twice marked Chromium bug reports for the issue as "won't fix." David Baron, presently a Google software engineer who worked for Mozilla at the time, filed a Firefox bug report about the issue back on May 28, 2002... On March 9, 2010, Baron published a blog post outlining the issue and proposing some mitigations... Read more of this story at Slashdot.

Apr 12, 2025 - 22:44
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Chrome To Patch Decades-Old 'Browser History Sniffing' Flaw That Let Sites Peek At Your History
Slashdot reader king*jojo shared this article from The Register: A 23-year-old side-channel attack for spying on people's web browsing histories will get shut down in the forthcoming Chrome 136, released last Thursday to the Chrome beta channel. At least that's the hope. The privacy attack, referred to as browser history sniffing, involves reading the color values of web links on a page to see if the linked pages have been visited previously... Web publishers and third parties capable of running scripts, have used this technique to present links on a web page to a visitor and then check how the visitor's browser set the color for those links on the rendered web page... The attack was mitigated about 15 years ago, though not effectively. Other ways to check link color information beyond the getComputedStyle method were developed... Chrome 136, due to see stable channel release on April 23, 2025, "is the first major browser to render these attacks obsolete," explained Kyra Seevers, Google software engineer in a blog post. This is something of a turnabout for the Chrome team, which twice marked Chromium bug reports for the issue as "won't fix." David Baron, presently a Google software engineer who worked for Mozilla at the time, filed a Firefox bug report about the issue back on May 28, 2002... On March 9, 2010, Baron published a blog post outlining the issue and proposing some mitigations...

Read more of this story at Slashdot.