CVE-2020-15654
published 2020-08-10CVE-2020-15654: When in an endless loop, a website specifying a custom cursor using CSS could make it look like the user is interacting with the user interface, when they are…
PriorityP277medium6.5CVSS 3.1
AVNACLPRNUIRSUCNIHAN
ITWVulnCheck KEV
Exploited in the wild
EPSS
1.24%
65.4th percentile
When in an endless loop, a website specifying a custom cursor using CSS could make it look like the user is interacting with the user interface, when they are not. This could lead to a perceived broken state, especially when interactions with existing browser dialogs and warnings do not work. This vulnerability affects Firefox ESR < 78.1, Firefox < 79, and Thunderbird < 78.1.
Affected
17 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| canonical | ubuntu_linux | — | — |
| canonical | ubuntu_linux | — | — |
| canonical | ubuntu_linux | — | — |
| debian | firefox | < firefox 79.0-1 (sid) | firefox 79.0-1 (sid) |
| debian | thunderbird | < firefox 79.0-1 (sid) | firefox 79.0-1 (sid) |
| mozilla | firefox | < 79.0 | 79.0 |
| mozilla | firefox | — | — |
| mozilla | firefox | >= 0 < 79.0+build1-0ubuntu0.16.04.2 | 79.0+build1-0ubuntu0.16.04.2 |
| mozilla | firefox | >= 0 < 79.0+build1-0ubuntu0.18.04.1 | 79.0+build1-0ubuntu0.18.04.1 |
| mozilla | firefox | >= 0 < 79.0+build1-0ubuntu0.20.04.1 | 79.0+build1-0ubuntu0.20.04.1 |
| mozilla | firefox | >= unspecified < 79 | 79 |
| mozilla | firefox_esr | < 78.1 | 78.1 |
| mozilla | firefox_esr | >= unspecified < 78.1 | 78.1 |
| mozilla | thunderbird | < 78.1 | 78.1 |
| mozilla | thunderbird | >= 0 < 1:78.8.1+build1-0ubuntu0.18.04.1 | 1:78.8.1+build1-0ubuntu0.18.04.1 |
| mozilla | thunderbird | >= 0 < 1:78.7.1+build1-0ubuntu0.20.04.1 | 1:78.7.1+build1-0ubuntu0.20.04.1 |
| mozilla | thunderbird | >= unspecified < 78.1 | 78.1 |
Detection & IOCsextracted from sources · hover to see the quote
- →Vulnerability involves a website using CSS custom cursor in an endless loop to overlay the browser UI, making dialogs/warnings non-interactive. Detect pages that specify CSS cursor properties combined with infinite loop JavaScript behavior. ↗
- ·Affected versions: Firefox < 79, Firefox ESR < 78.1, Thunderbird < 78.1. Ensure browser/client deployments are patched to at least these versions to remediate CVE-2020-15654. ↗
- ·Red Hat Enterprise Linux 7 and 8 Thunderbird packages are marked 'Will not fix', meaning patched Thunderbird may not be available via standard RHEL channels for those versions. ↗
CVSS provenance
nvdv3.16.5MEDIUMCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N
nvdv2.04.3MEDIUMAV:N/AC:M/Au:N/C:N/I:P/A:N
osv6.5MEDIUM
vulncheck6.5MEDIUM
vendor_debian6.5MEDIUM
vendor_redhat6.5MEDIUM
vendor_ubuntu6.5MEDIUM
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Ubuntu
Firefox vulnerabilities
vendor_ubuntu·2020-07-29·CVSS 6.5
CVE-2020-15652 [MEDIUM] Firefox vulnerabilities
Title: Firefox vulnerabilities
Summary: Firefox could be made to crash or run programs as your login if it
opened a malicious website.
Multiple security issues were discovered in Firefox. If a user were
tricked in to opening a specially crafted website, an attacker could
potentially exploit these to cause a denial of service, obtain sensitive
information, bypass iframe sandbox restrictions, confuse the user, or
execute arbitrary code. (CVE-2020-6463, CVE-2020-6514, CVE-2020-15652,
CVE-2020-15653, CVE-2020-15654, CVE-2020-15656, CVE-2020-15658,
CVE-2020-15659)
It was discovered that redirected HTTP requests which are observed or
modified through a web extension could bypass existing CORS checks. If a
user were tricked in to installing a specially crafted extension, an
attacker could pote
Red Hat
Mozilla: Custom cursor can overlay user interface
vendor_redhat·2020-07-28·CVSS 6.5
CVE-2020-15654 [MEDIUM] CWE-451 Mozilla: Custom cursor can overlay user interface
Mozilla: Custom cursor can overlay user interface
When in an endless loop, a website specifying a custom cursor using CSS could make it look like the user is interacting with the user interface, when they are not. This could lead to a perceived broken state, especially when interactions with existing browser dialogs and warnings do not work. This vulnerability affects Firefox ESR < 78.1, Firefox < 79, and Thunderbird < 78.1.
Package: firefox (Red Hat Enterprise Linux 5) - Not affected
Package: thunderbird (Red Hat Enterprise Linux 5) - Out of support scope
Package: firefox (Red Hat Enterprise Linux 6) - Out of support scope
Package: thunderbird (Red Hat Enterprise Linux 6) - Out of support scope
Package: thunderbird (Red Hat Enterprise Linux 7) - Will not fix
Package: thunderbird (R
Debian
CVE-2020-15654: firefox - When in an endless loop, a website specifying a custom cursor using CSS could ma...
vendor_debian·2020·CVSS 6.5
CVE-2020-15654 [MEDIUM] CVE-2020-15654: firefox - When in an endless loop, a website specifying a custom cursor using CSS could ma...
When in an endless loop, a website specifying a custom cursor using CSS could make it look like the user is interacting with the user interface, when they are not. This could lead to a perceived broken state, especially when interactions with existing browser dialogs and warnings do not work. This vulnerability affects Firefox ESR < 78.1, Firefox < 79, and Thunderbird < 78.1.
Scope: local
sid: resolved (fixed in 79.0-1)
Mozilla
Mozilla Foundation Security Advisory 2020-33: CVE-2020-15654
vendor_mozilla·CVSS 6.5
CVE-2020-15654 [MEDIUM] Mozilla Foundation Security Advisory 2020-33: CVE-2020-15654
Mozilla Foundation Security Advisory 2020-33
CVE: CVE-2020-15654
Product: Thunderbird
Impact: high
Fixed in: Thunderbird 78.1
Mozilla
Mozilla Foundation Security Advisory 2020-30: CVE-2020-15654
vendor_mozilla·CVSS 6.5
CVE-2020-15654 [MEDIUM] Mozilla Foundation Security Advisory 2020-30: CVE-2020-15654
Mozilla Foundation Security Advisory 2020-30
CVE: CVE-2020-15654
Product: Firefox
Impact: high
Fixed in: Firefox 79
Mozilla
Mozilla Foundation Security Advisory 2020-32: CVE-2020-15654
vendor_mozilla·CVSS 6.5
CVE-2020-15654 [MEDIUM] Mozilla Foundation Security Advisory 2020-32: CVE-2020-15654
Mozilla Foundation Security Advisory 2020-32
CVE: CVE-2020-15654
Product: Firefox ESR
Impact: high
Fixed in: Firefox ESR 78.1
GHSA
GHSA-8j7j-8w2r-72pq: When in an endless loop, a website specifying a custom cursor using CSS could make it look like the user is interacting with the user interface, when
ghsa_unreviewed·2022-05-24
CVE-2020-15654 [MEDIUM] CWE-835 GHSA-8j7j-8w2r-72pq: When in an endless loop, a website specifying a custom cursor using CSS could make it look like the user is interacting with the user interface, when
When in an endless loop, a website specifying a custom cursor using CSS could make it look like the user is interacting with the user interface, when they are not. This could lead to a perceived broken state, especially when interactions with existing browser dialogs and warnings do not work. This vulnerability affects Firefox ESR < 78.1, Firefox < 79, and Thunderbird < 78.1.
OSV
CVE-2020-15654: When in an endless loop, a website specifying a custom cursor using CSS could make it look like the user is interacting with the user interface, when
osv·2020-07-29·CVSS 6.5
CVE-2020-15654 [MEDIUM] CVE-2020-15654: When in an endless loop, a website specifying a custom cursor using CSS could make it look like the user is interacting with the user interface, when
When in an endless loop, a website specifying a custom cursor using CSS could make it look like the user is interacting with the user interface, when they are not. This could lead to a perceived broken state, especially when interactions with existing browser dialogs and warnings do not work. This vulnerability affects Firefox ESR < 78.1, Firefox < 79, and Thunderbird < 78.1.
OSV
firefox vulnerabilities
osv·2020-07-29·CVSS 6.5
CVE-2020-6463 [MEDIUM] firefox vulnerabilities
firefox vulnerabilities
Multiple security issues were discovered in Firefox. If a user were
tricked in to opening a specially crafted website, an attacker could
potentially exploit these to cause a denial of service, obtain sensitive
information, bypass iframe sandbox restrictions, confuse the user, or
execute arbitrary code. (CVE-2020-6463, CVE-2020-6514, CVE-2020-15652,
CVE-2020-15653, CVE-2020-15654, CVE-2020-15656, CVE-2020-15658,
CVE-2020-15659)
It was discovered that redirected HTTP requests which are observed or
modified through a web extension could bypass existing CORS checks. If a
user were tricked in to installing a specially crafted extension, an
attacker could potentially exploit this to obtain sensitive information
across origins. (CVE-2020-15655)
VulnCheck
Mozilla Firefox Loop with Unreachable Exit Condition ('Infinite Loop')
vulncheck·2020·CVSS 6.5
CVE-2020-15654 [MEDIUM] Mozilla Firefox Loop with Unreachable Exit Condition ('Infinite Loop')
Mozilla Firefox Loop with Unreachable Exit Condition ('Infinite Loop')
When in an endless loop, a website specifying a custom cursor using CSS could make it look like the user is interacting with the user interface, when they are not. This could lead to a perceived broken state, especially when interactions with existing browser dialogs and warnings do not work. This vulnerability affects Firefox ESR < 78.1, Firefox < 79, and Thunderbird < 78.1.
Affected: Mozilla Firefox
Required Action: Apply remediations or mitigations per vendor instructions or discontinue use of the product if remediation or mitigations are unavailable.
Exploitation References: https://www.zdnet.com/article/firefox-gets-fix-for-evil-cursor-attack/
No detection rules found.
No public exploits indexed.
http://lists.opensuse.org/opensuse-security-announce/2020-08/msg00025.htmlhttps://bugzilla.mozilla.org/show_bug.cgi?id=1648333https://usn.ubuntu.com/4443-1/https://www.mozilla.org/security/advisories/mfsa2020-30/https://www.mozilla.org/security/advisories/mfsa2020-32/https://www.mozilla.org/security/advisories/mfsa2020-33/http://lists.opensuse.org/opensuse-security-announce/2020-08/msg00025.htmlhttps://bugzilla.mozilla.org/show_bug.cgi?id=1648333https://usn.ubuntu.com/4443-1/https://www.mozilla.org/security/advisories/mfsa2020-30/https://www.mozilla.org/security/advisories/mfsa2020-32/https://www.mozilla.org/security/advisories/mfsa2020-33/
2020-08-10
Published
Exploited in the wild