CVE-2020-26958
published 2020-12-09CVE-2020-26958: Firefox did not block execution of scripts with incorrect MIME types when the response was intercepted and cached through a ServiceWorker. This could lead to a…
PriorityP427medium6.1CVSS 3.1
AVNACLPRNUIRSCCLILAN
EPSS
1.31%
67.1th percentile
Firefox did not block execution of scripts with incorrect MIME types when the response was intercepted and cached through a ServiceWorker. This could lead to a cross-site script inclusion vulnerability, or a Content Security Policy bypass. This vulnerability affects Firefox < 83, Firefox ESR < 78.5, and Thunderbird < 78.5.
Affected
12 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| debian | firefox | < firefox 83.0-1 (sid) | firefox 83.0-1 (sid) |
| debian | firefox-esr | < firefox 83.0-1 (sid) | firefox 83.0-1 (sid) |
| debian | thunderbird | < firefox 83.0-1 (sid) | firefox 83.0-1 (sid) |
| mozilla | firefox | < 83 | 83 |
| mozilla | firefox | < 83.0 | 83.0 |
| mozilla | firefox | — | — |
| mozilla | firefox_esr | < 78.5 | 78.5 |
| mozilla | thunderbird | < 78.5 | 78.5 |
| mozilla | thunderbird | >= 0 < 1:78.5.0-1 | 1:78.5.0-1 |
| mozilla | thunderbird | >= 0 < 1:78.5.0-1 | 1:78.5.0-1 |
| mozilla | thunderbird | >= 0 < 1:78.5.0-1 | 1:78.5.0-1 |
| mozilla | thunderbird | >= 0 < 1:78.5.0-1 | 1:78.5.0-1 |
CVSS provenance
nvdv3.16.1MEDIUMCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
nvdv2.04.3MEDIUMAV:N/AC:M/Au:N/C:N/I:P/A:N
osv6.1MEDIUM
vendor_debian6.1MEDIUM
vendor_redhat6.1MEDIUM
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Ubuntu
Thunderbird vulnerabilities
vendor_ubuntu·2020-11-25
CVE-2020-16012 Thunderbird vulnerabilities
Title: Thunderbird vulnerabilities
Summary: Several security issues were fixed in Thunderbird.
Multiple security issues were discovered in Thunderbird. If a user were
tricked in to opening a specially crafted website in a browsing context,
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 Thunderbird to make
all the necessary changes.
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.
Red Hat
Mozilla: Requests intercepted through ServiceWorkers lacked MIME type restrictions
vendor_redhat·2020-11-17·CVSS 6.1
CVE-2020-26958 [MEDIUM] CWE-79 Mozilla: Requests intercepted through ServiceWorkers lacked MIME type restrictions
Mozilla: Requests intercepted through ServiceWorkers lacked MIME type restrictions
Firefox did not block execution of scripts with incorrect MIME types when the response was intercepted and cached through a ServiceWorker. This could lead to a cross-site script inclusion vulnerability, or a Content Security Policy bypass. This vulnerability affects Firefox < 83, Firefox ESR < 78.5, and Thunderbird < 78.5.
Package: firefox (Red Hat Enterprise Linux 5) - Out of support scope
Debian
CVE-2020-26958: firefox - Firefox did not block execution of scripts with incorrect MIME types when the re...
vendor_debian·2020·CVSS 6.1
CVE-2020-26958 [MEDIUM] CVE-2020-26958: firefox - Firefox did not block execution of scripts with incorrect MIME types when the re...
Firefox did not block execution of scripts with incorrect MIME types when the response was intercepted and cached through a ServiceWorker. This could lead to a cross-site script inclusion vulnerability, or a Content Security Policy bypass. This vulnerability affects Firefox < 83, Firefox ESR < 78.5, and Thunderbird < 78.5.
Scope: local
sid: resolved (fixed in 83.0-1)
Mozilla
Mozilla Foundation Security Advisory 2020-50: CVE-2020-26958
vendor_mozilla·CVSS 6.1
CVE-2020-26958 [MEDIUM] Mozilla Foundation Security Advisory 2020-50: CVE-2020-26958
Mozilla Foundation Security Advisory 2020-50
CVE: CVE-2020-26958
Product: Firefox
Impact: high
Fixed in: Firefox 83
Mozilla
Mozilla Foundation Security Advisory 2020-52: CVE-2020-26958
vendor_mozilla·CVSS 6.1
CVE-2020-26958 [MEDIUM] Mozilla Foundation Security Advisory 2020-52: CVE-2020-26958
Mozilla Foundation Security Advisory 2020-52
CVE: CVE-2020-26958
Product: Thunderbird
Impact: high
Fixed in: Thunderbird 78.5
Mozilla
Mozilla Foundation Security Advisory 2020-51: CVE-2020-26958
vendor_mozilla·CVSS 6.1
CVE-2020-26958 [MEDIUM] Mozilla Foundation Security Advisory 2020-51: CVE-2020-26958
Mozilla Foundation Security Advisory 2020-51
CVE: CVE-2020-26958
Product: Firefox ESR
Impact: high
Fixed in: Firefox ESR 78.5
GHSA
GHSA-3qgm-cw58-7h2p: Firefox did not block execution of scripts with incorrect MIME types when the response was intercepted and cached through a ServiceWorker
ghsa_unreviewed·2022-05-24
CVE-2020-26958 [MEDIUM] CWE-79 GHSA-3qgm-cw58-7h2p: Firefox did not block execution of scripts with incorrect MIME types when the response was intercepted and cached through a ServiceWorker
Firefox did not block execution of scripts with incorrect MIME types when the response was intercepted and cached through a ServiceWorker. This could lead to a cross-site script inclusion vulnerability, or a Content Security Policy bypass. This vulnerability affects Firefox < 83, Firefox ESR < 78.5, and Thunderbird < 78.5.
OSV
CVE-2020-26958: Firefox did not block execution of scripts with incorrect MIME types when the response was intercepted and cached through a ServiceWorker
osv·2020-12-09·CVSS 6.1
CVE-2020-26958 [MEDIUM] CVE-2020-26958: Firefox did not block execution of scripts with incorrect MIME types when the response was intercepted and cached through a ServiceWorker
Firefox did not block execution of scripts with incorrect MIME types when the response was intercepted and cached through a ServiceWorker. This could lead to a cross-site script inclusion vulnerability, or a Content Security Policy bypass. This vulnerability affects Firefox < 83, Firefox ESR < 78.5, and Thunderbird < 78.5.
No detection rules found.
No public exploits indexed.
No writeups or analysis indexed.
https://bugzilla.mozilla.org/show_bug.cgi?id=1669355https://www.mozilla.org/security/advisories/mfsa2020-50/https://www.mozilla.org/security/advisories/mfsa2020-51/https://www.mozilla.org/security/advisories/mfsa2020-52/https://bugzilla.mozilla.org/show_bug.cgi?id=1669355https://www.mozilla.org/security/advisories/mfsa2020-50/https://www.mozilla.org/security/advisories/mfsa2020-51/https://www.mozilla.org/security/advisories/mfsa2020-52/
2020-12-09
Published