CVE-2020-26967
published 2020-12-09CVE-2020-26967: When listening for page changes with a Mutation Observer, a malicious web page could confuse Firefox Screenshots into interacting with elements other than…
PriorityP426medium6.5CVSS 3.1
AVNACLPRNUIRSUCNIHAN
EPSS
0.84%
53.5th percentile
When listening for page changes with a Mutation Observer, a malicious web page could confuse Firefox Screenshots into interacting with elements other than those that it injected into the page. This would lead to internal errors and unexpected behavior in the Screenshots code. This vulnerability affects Firefox < 83.
Affected
7 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| debian | firefox | < firefox 83.0-1 (sid) | firefox 83.0-1 (sid) |
| mozilla | firefox | < 83 | 83 |
| mozilla | firefox | < 83.0 | 83.0 |
| mozilla | firefox | — | — |
| mozilla | firefox | >= 0 < 83.0+build2-0ubuntu0.16.04.3 | 83.0+build2-0ubuntu0.16.04.3 |
| mozilla | firefox | >= 0 < 83.0+build2-0ubuntu0.18.04.2 | 83.0+build2-0ubuntu0.18.04.2 |
| mozilla | firefox | >= 0 < 83.0+build2-0ubuntu0.20.04.1 | 83.0+build2-0ubuntu0.20.04.1 |
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
vendor_debian6.5MEDIUM
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Ubuntu
Firefox vulnerabilities
vendor_ubuntu·2020-11-19
CVE-2020-26958 Firefox vulnerabilities
Title: Firefox vulnerabilities
Summary: Firefox could be made to crash or run programs as your login if it
opened a malicious website.
USN-4637-1 fixed vulnerabilities in Firefox. This update provides the
corresponding updates for Ubuntu 16.04 LTS.
Original advisory details:
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 across origins, bypass security restrictions, conduct phishing
attacks, conduct cross-site scripting (XSS) attacks, bypass Content
Security Policy (CSP) restrictions, conduct DNS rebinding attacks, or
execute arbitrary code.
Instructions: After a standard system update you need to restart Firefox
Ubuntu
Firefox vulnerabilities
vendor_ubuntu·2020-11-18
CVE-2020-26952 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 across origins, bypass security restrictions, conduct phishing
attacks, conduct cross-site scripting (XSS) attacks, bypass Content
Security Policy (CSP) restrictions, conduct DNS rebinding attacks, or
execute arbitrary code.
Instructions: After a standard system update you need to restart Firefox to make
all the necessary changes.
Debian
CVE-2020-26967: firefox - When listening for page changes with a Mutation Observer, a malicious web page c...
vendor_debian·2020·CVSS 6.5
CVE-2020-26967 [MEDIUM] CVE-2020-26967: firefox - When listening for page changes with a Mutation Observer, a malicious web page c...
When listening for page changes with a Mutation Observer, a malicious web page could confuse Firefox Screenshots into interacting with elements other than those that it injected into the page. This would lead to internal errors and unexpected behavior in the Screenshots code. This vulnerability affects Firefox < 83.
Scope: local
sid: resolved (fixed in 83.0-1)
Mozilla
Mozilla Foundation Security Advisory 2020-50: CVE-2020-26967
vendor_mozilla·CVSS 6.5
CVE-2020-26967 [MEDIUM] Mozilla Foundation Security Advisory 2020-50: CVE-2020-26967
Mozilla Foundation Security Advisory 2020-50
CVE: CVE-2020-26967
Product: Firefox
Impact: high
Fixed in: Firefox 83
GHSA
GHSA-g4xj-2594-cc4j: When listening for page changes with a Mutation Observer, a malicious web page could confuse Firefox Screenshots into interacting with elements other
ghsa_unreviewed·2022-05-24
CVE-2020-26967 [MEDIUM] GHSA-g4xj-2594-cc4j: When listening for page changes with a Mutation Observer, a malicious web page could confuse Firefox Screenshots into interacting with elements other
When listening for page changes with a Mutation Observer, a malicious web page could confuse Firefox Screenshots into interacting with elements other than those that it injected into the page. This would lead to internal errors and unexpected behavior in the Screenshots code. This vulnerability affects Firefox < 83.
OSV
CVE-2020-26967: When listening for page changes with a Mutation Observer, a malicious web page could confuse Firefox Screenshots into interacting with elements other
osv·2020-11-17·CVSS 6.5
CVE-2020-26967 [MEDIUM] CVE-2020-26967: When listening for page changes with a Mutation Observer, a malicious web page could confuse Firefox Screenshots into interacting with elements other
When listening for page changes with a Mutation Observer, a malicious web page could confuse Firefox Screenshots into interacting with elements other than those that it injected into the page. This would lead to internal errors and unexpected behavior in the Screenshots code. This vulnerability affects Firefox < 83.
No detection rules found.
No public exploits indexed.
No writeups or analysis indexed.
2020-12-09
Published