Headline
CVE-2020-15677: Security Vulnerabilities fixed in Firefox 81
By exploiting an Open Redirect vulnerability on a website, an attacker could have spoofed the site displayed in the download file dialog to show the original site (the one suffering from the open redirect) rather than the site the file was actually downloaded from. This vulnerability affects Firefox < 81, Thunderbird < 78.3, and Firefox ESR < 78.3.
Mozilla Foundation Security Advisory 2020-42
Announced
September 22, 2020
Impact
high
Products
Firefox
Fixed in
- Firefox 81
#CVE-2020-15675: Use-After-Free in WebGL
Reporter
Brian Carpenter via the ASAN Nightly project
Impact
high
Description
When processing surfaces, the lifetime may outlive a persistent buffer leading to memory corruption and a potentially exploitable crash.
References
- Bug 1654211
#CVE-2020-15677: Download origin spoofing via redirect
Reporter
Richard Thomas and Tom Chothia of University of Birmingham
Impact
moderate
Description
By exploiting an Open Redirect vulnerability on a website, an attacker could have spoofed the site displayed in the download file dialog to show the original site (the one suffering from the open redirect) rather than the site the file was actually downloaded from.
References
- Bug 1641487
#CVE-2020-15676: XSS when pasting attacker-controlled data into a contenteditable element
Reporter
Daniel Fröjdendahl
Impact
moderate
Description
Firefox sometimes ran the onload handler for SVG elements that the DOM sanitizer decided to remove, resulting in JavaScript being executed after pasting attacker-controlled data into a contenteditable element.
References
- Bug 1646140
#CVE-2020-15678: When recursing through layers while scrolling, an iterator may have become invalid, resulting in a potential use-after-free scenario
Reporter
Lukas Bernhard
Impact
moderate
Description
When recursing through graphical layers while scrolling, an iterator may have become invalid, resulting in a potential use-after-free. This occurs because the function APZCTreeManager::ComputeClippedCompositionBounds did not follow iterator invalidation rules.
References
- Bug 1660211
#CVE-2020-15673: Memory safety bugs fixed in Firefox 81 and Firefox ESR 78.3
Reporter
Jason Kratzer
Impact
high
Description
Mozilla developer Jason Kratzer reported memory safety bugs present in Firefox 80 and Firefox ESR 78.2. Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of these could have been exploited to run arbitrary code.
References
- Memory safety bugs fixed in Firefox 81 and Firefox ESR 78.3
#CVE-2020-15674: Memory safety bugs fixed in Firefox 81
Reporter
Mozilla developers
Impact
high
Description
Mozilla developers Byron Campen and Christian Holler reported memory safety bugs present in Firefox 80. Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of these could have been exploited to run arbitrary code.
References
- Memory safety bugs fixed in Firefox 81