CVE-2021-23961
published 2021-02-26CVE-2021-23961: Further techniques that built on the slipstream research combined with a malicious webpage could have exposed both an internal network's hosts as well as…
PriorityP336high7.4CVSS 3.1
AVNACLPRNUIRSCCHINAN
EPSS
1.32%
67.4th percentile
Further techniques that built on the slipstream research combined with a malicious webpage could have exposed both an internal network's hosts as well as services running on the user's local machine. This vulnerability affects Firefox < 85.
Affected
14 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| debian | debian_linux | — | — |
| debian | debian_linux | — | — |
| debian | firefox | < firefox 85.0-1 (sid) | firefox 85.0-1 (sid) |
| debian | firefox-esr | < firefox 85.0-1 (sid) | firefox 85.0-1 (sid) |
| debian | thunderbird | < firefox 85.0-1 (sid) | firefox 85.0-1 (sid) |
| mozilla | firefox | < 85 | 85 |
| mozilla | firefox | < 85.0 | 85.0 |
| mozilla | firefox | — | — |
| mozilla | thunderbird | >= 0 < 1:78.10.0-1 | 1:78.10.0-1 |
| mozilla | thunderbird | >= 0 < 1:78.10.0-1 | 1:78.10.0-1 |
| mozilla | thunderbird | >= 0 < 1:78.10.0-1 | 1:78.10.0-1 |
| mozilla | thunderbird | >= 0 < 1:78.10.0-1 | 1:78.10.0-1 |
| mozilla | thunderbird | >= 0 < 1:78.11.0+build1-0ubuntu0.18.04.2 | 1:78.11.0+build1-0ubuntu0.18.04.2 |
| mozilla | thunderbird | >= 0 < 1:78.11.0+build1-0ubuntu0.20.04.2 | 1:78.11.0+build1-0ubuntu0.20.04.2 |
CVSS provenance
nvdv3.17.4HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:N/A:N
nvdv2.04.3MEDIUMAV:N/AC:M/Au:N/C:P/I:N/A:N
osv7.4HIGH
vendor_debian7.4HIGH
vendor_redhat7.4HIGH
vendor_ubuntu7.4HIGH
Stop checking back — get the weekly exploitation signal.
Every Monday: what got weaponized or added to CISA KEV in the last seven days — each CVE cross-linked to its PoC, Nuclei template, and detection rule. Free, one email a week, unsubscribe in one click.
Ubuntu
Thunderbird vulnerabilities
vendor_ubuntu·2021-06-25·CVSS 7.4
CVE-2021-29948 [HIGH] Thunderbird vulnerabilities
Title: Thunderbird vulnerabilities
Summary: Several security issues were fixed in Thunderbird.
USN-4995-1 fixed vulnerabilities in Thunderbird. This update provides
the corresponding updates for Ubuntu 18.04 LTS.
Original advisory details:
Multiple security issues were discovered in Thunderbird. If a user were
tricked into opening a specially crafted website in a browsing context, an
attacker could potentially exploit these to cause a denial of service,
obtain sensitive information, spoof the UI, bypass security restrictions,
or execute arbitrary code. (CVE-2021-23961, CVE-2021-23981,
CVE-2021-23982, CVE-2021-23987, CVE-2021-23994, CVE-2021-23998,
CVE-2021-23999, CVE-2021-29945, CVE-2021-29946, CVE-2021-29967)
It was discovered that extensions could open popup windows with control
of
Ubuntu
Thunderbird vulnerabilities
vendor_ubuntu·2021-06-22·CVSS 7.4
CVE-2021-23961 [HIGH] 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 into opening a specially crafted website in a browsing context, an
attacker could potentially exploit these to cause a denial of service,
obtain sensitive information, spoof the UI, bypass security restrictions,
or execute arbitrary code. (CVE-2021-23961, CVE-2021-23981,
CVE-2021-23982, CVE-2021-23987, CVE-2021-23994, CVE-2021-23998,
CVE-2021-23999, CVE-2021-29945, CVE-2021-29946, CVE-2021-29967)
It was discovered that extensions could open popup windows with control
of the window title in some circumstances. If a user were tricked into
installing a specially crafted extension, an attacker could potentially
exploit
Red Hat
Mozilla: More internal network hosts could have been probed by a malicious webpage
vendor_redhat·2021-04-19·CVSS 7.4
CVE-2021-23961 [HIGH] CWE-200 Mozilla: More internal network hosts could have been probed by a malicious webpage
Mozilla: More internal network hosts could have been probed by a malicious webpage
Further techniques that built on the slipstream research combined with a malicious webpage could have exposed both an internal network's hosts as well as services running on the user's local machine. This vulnerability affects Firefox < 85.
Package: firefox (Red Hat Enterprise Linux 6) - Out of support scope
Package: thunderbird (Red Hat Enterprise Linux 6) - Out of support scope
Ubuntu
Firefox vulnerabilities
vendor_ubuntu·2021-02-01
CVE-2021-23954 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, conduct clickjacking attacks, or execute arbitrary code.
Instructions: After a standard system update you need to restart Firefox to make
all the necessary changes.
Debian
CVE-2021-23961: firefox - Further techniques that built on the slipstream research combined with a malicio...
vendor_debian·2021·CVSS 7.4
CVE-2021-23961 [HIGH] CVE-2021-23961: firefox - Further techniques that built on the slipstream research combined with a malicio...
Further techniques that built on the slipstream research combined with a malicious webpage could have exposed both an internal network's hosts as well as services running on the user's local machine. This vulnerability affects Firefox < 85.
Scope: local
sid: resolved (fixed in 85.0-1)
Mozilla
Mozilla Foundation Security Advisory 2021-14: CVE-2021-23961
vendor_mozilla·CVSS 7.4
CVE-2021-23961 [HIGH] Mozilla Foundation Security Advisory 2021-14: CVE-2021-23961
Mozilla Foundation Security Advisory 2021-14
CVE: CVE-2021-23961
Product: Thunderbird
Impact: low
Fixed in: Thunderbird 78.10
Mozilla
Mozilla Foundation Security Advisory 2021-15: CVE-2021-23961
vendor_mozilla·CVSS 7.4
CVE-2021-23961 [HIGH] Mozilla Foundation Security Advisory 2021-15: CVE-2021-23961
Mozilla Foundation Security Advisory 2021-15
CVE: CVE-2021-23961
Product: Firefox ESR
Impact: low
Fixed in: Firefox ESR 78.10
Mozilla
Mozilla Foundation Security Advisory 2021-03: CVE-2021-23961
vendor_mozilla·CVSS 7.4
CVE-2021-23961 [HIGH] Mozilla Foundation Security Advisory 2021-03: CVE-2021-23961
Mozilla Foundation Security Advisory 2021-03
CVE: CVE-2021-23961
Product: Firefox
Impact: high
Fixed in: Firefox 85
GHSA
GHSA-m4x9-6p9j-3hx6: Further techniques that built on the slipstream research combined with a malicious webpage could have exposed both an internal network's hosts as well
ghsa_unreviewed·2022-05-24
CVE-2021-23961 [HIGH] GHSA-m4x9-6p9j-3hx6: Further techniques that built on the slipstream research combined with a malicious webpage could have exposed both an internal network's hosts as well
Further techniques that built on the slipstream research combined with a malicious webpage could have exposed both an internal network's hosts as well as services running on the user's local machine. This vulnerability affects Firefox < 85.
OSV
thunderbird vulnerabilities
osv·2021-06-25·CVSS 7.4
[HIGH] thunderbird vulnerabilities
thunderbird vulnerabilities
USN-4995-1 fixed vulnerabilities in Thunderbird. This update provides
the corresponding updates for Ubuntu 18.04 LTS.
Original advisory details:
Multiple security issues were discovered in Thunderbird. If a user were
tricked into opening a specially crafted website in a browsing context, an
attacker could potentially exploit these to cause a denial of service,
obtain sensitive information, spoof the UI, bypass security restrictions,
or execute arbitrary code. (CVE-2021-23961, CVE-2021-23981,
CVE-2021-23982, CVE-2021-23987, CVE-2021-23994, CVE-2021-23998,
CVE-2021-23999, CVE-2021-29945, CVE-2021-29946, CVE-2021-29967)
It was discovered that extensions could open popup windows with control
of the window title in some circumstances. If a user were tricked into
OSV
thunderbird vulnerabilities
osv·2021-06-22·CVSS 7.4
CVE-2021-23961 [HIGH] thunderbird vulnerabilities
thunderbird vulnerabilities
Multiple security issues were discovered in Thunderbird. If a user were
tricked into opening a specially crafted website in a browsing context, an
attacker could potentially exploit these to cause a denial of service,
obtain sensitive information, spoof the UI, bypass security restrictions,
or execute arbitrary code. (CVE-2021-23961, CVE-2021-23981,
CVE-2021-23982, CVE-2021-23987, CVE-2021-23994, CVE-2021-23998,
CVE-2021-23999, CVE-2021-29945, CVE-2021-29946, CVE-2021-29967)
It was discovered that extensions could open popup windows with control
of the window title in some circumstances. If a user were tricked into
installing a specially crafted extension, an attacker could potentially
exploit this to spoof a website and trick the user into providing
credentia
OSV
CVE-2021-23961: Further techniques that built on the slipstream research combined with a malicious webpage could have exposed both an internal network's hosts as well
osv·2021-02-26·CVSS 7.4
CVE-2021-23961 [HIGH] CVE-2021-23961: Further techniques that built on the slipstream research combined with a malicious webpage could have exposed both an internal network's hosts as well
Further techniques that built on the slipstream research combined with a malicious webpage could have exposed both an internal network's hosts as well as services running on the user's local machine. This vulnerability affects Firefox < 85.
No detection rules found.
No public exploits indexed.
No writeups or analysis indexed.
https://bugzilla.mozilla.org/show_bug.cgi?id=1677940https://lists.debian.org/debian-lts-announce/2021/04/msg00019.htmlhttps://lists.debian.org/debian-lts-announce/2021/04/msg00020.htmlhttps://security.gentoo.org/glsa/202104-09https://security.gentoo.org/glsa/202104-10https://www.debian.org/security/2021/dsa-4895https://www.debian.org/security/2021/dsa-4897https://www.mozilla.org/security/advisories/mfsa2021-03/https://bugzilla.mozilla.org/show_bug.cgi?id=1677940https://lists.debian.org/debian-lts-announce/2021/04/msg00019.htmlhttps://lists.debian.org/debian-lts-announce/2021/04/msg00020.htmlhttps://security.gentoo.org/glsa/202104-09https://security.gentoo.org/glsa/202104-10https://www.debian.org/security/2021/dsa-4895https://www.debian.org/security/2021/dsa-4897https://www.mozilla.org/security/advisories/mfsa2021-03/
2021-02-26
Published