CVE-2020-26959
published 2020-12-09CVE-2020-26959: During browser shutdown, reference decrementing could have occured on a previously freed object, resulting in a use-after-free, memory corruption, and a…
PriorityP340high8.8CVSS 3.1
AVNACLPRNUIRSUCHIHAH
EPSS
1.27%
66.4th percentile
During browser shutdown, reference decrementing could have occured on a previously freed object, resulting in a use-after-free, memory corruption, and a potentially exploitable crash. 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
nvdv3.18.8HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
nvdv2.06.8MEDIUMAV:N/AC:M/Au:N/C:P/I:P/A:P
osv8.8HIGH
vendor_debian8.8HIGH
vendor_redhat8.8HIGH
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GHSA
GHSA-w4gq-6hmw-x862: During browser shutdown, reference decrementing could have occured on a previously freed object, resulting in a use-after-free, memory corruption, and
ghsa_unreviewed·2022-05-24
CVE-2020-26959 [HIGH] CWE-416 GHSA-w4gq-6hmw-x862: During browser shutdown, reference decrementing could have occured on a previously freed object, resulting in a use-after-free, memory corruption, and
During browser shutdown, reference decrementing could have occured on a previously freed object, resulting in a use-after-free, memory corruption, and a potentially exploitable crash. This vulnerability affects Firefox < 83, Firefox ESR < 78.5, and Thunderbird < 78.5.
OSV
CVE-2020-26959: During browser shutdown, reference decrementing could have occured on a previously freed object, resulting in a use-after-free, memory corruption, and
osv·2020-12-09·CVSS 8.8
CVE-2020-26959 [HIGH] CVE-2020-26959: During browser shutdown, reference decrementing could have occured on a previously freed object, resulting in a use-after-free, memory corruption, and
During browser shutdown, reference decrementing could have occured on a previously freed object, resulting in a use-after-free, memory corruption, and a potentially exploitable crash. This vulnerability affects Firefox < 83, Firefox ESR < 78.5, and Thunderbird < 78.5.
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: Use-after-free in WebRequestService
vendor_redhat·2020-11-17·CVSS 8.8
CVE-2020-26959 [HIGH] CWE-416 Mozilla: Use-after-free in WebRequestService
Mozilla: Use-after-free in WebRequestService
During browser shutdown, reference decrementing could have occured on a previously freed object, resulting in a use-after-free, memory corruption, and a potentially exploitable crash. 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-2020-26959: firefox - During browser shutdown, reference decrementing could have occured on a previous...
vendor_debian·2020·CVSS 8.8
CVE-2020-26959 [HIGH] CVE-2020-26959: firefox - During browser shutdown, reference decrementing could have occured on a previous...
During browser shutdown, reference decrementing could have occured on a previously freed object, resulting in a use-after-free, memory corruption, and a potentially exploitable crash. 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-2020-26959
vendor_mozilla·CVSS 8.8
CVE-2020-26959 [HIGH] Mozilla Foundation Security Advisory 2020-50: CVE-2020-26959
Mozilla Foundation Security Advisory 2020-50
CVE: CVE-2020-26959
Product: Firefox
Impact: high
Fixed in: Firefox 83
Mozilla
Mozilla Foundation Security Advisory 2020-52: CVE-2020-26959
vendor_mozilla·CVSS 8.8
CVE-2020-26959 [HIGH] Mozilla Foundation Security Advisory 2020-52: CVE-2020-26959
Mozilla Foundation Security Advisory 2020-52
CVE: CVE-2020-26959
Product: Thunderbird
Impact: high
Fixed in: Thunderbird 78.5
Mozilla
Mozilla Foundation Security Advisory 2020-51: CVE-2020-26959
vendor_mozilla·CVSS 8.8
CVE-2020-26959 [HIGH] Mozilla Foundation Security Advisory 2020-51: CVE-2020-26959
Mozilla Foundation Security Advisory 2020-51
CVE: CVE-2020-26959
Product: Firefox ESR
Impact: high
Fixed in: Firefox ESR 78.5
No detection rules found.
No public exploits indexed.
No writeups or analysis indexed.
https://bugzilla.mozilla.org/show_bug.cgi?id=1669466https://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=1669466https://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