CVE-2020-12409
published 2020-07-09CVE-2020-12409: When using certain blank characters in a URL, they where incorrectly rendered as spaces instead of an encoded URL. This vulnerability affects Firefox < 77.
PriorityP338high8.8CVSS 3.1
AVNACLPRNUIRSUCHIHAH
EPSS
1.02%
59.2th percentile
When using certain blank characters in a URL, they where incorrectly rendered as spaces instead of an encoded URL. This vulnerability affects Firefox < 77.
Affected
7 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| debian | firefox | < firefox 77.0-1 (sid) | firefox 77.0-1 (sid) |
| mozilla | firefox | < 77.0 | 77.0 |
| mozilla | firefox | — | — |
| mozilla | firefox | >= 0 < 77.0.1+build1-0ubuntu0.16.04.1 | 77.0.1+build1-0ubuntu0.16.04.1 |
| mozilla | firefox | >= 0 < 77.0.1+build1-0ubuntu0.18.04.1 | 77.0.1+build1-0ubuntu0.18.04.1 |
| mozilla | firefox | >= 0 < 77.0.1+build1-0ubuntu0.20.04.1 | 77.0.1+build1-0ubuntu0.20.04.1 |
| mozilla | firefox | >= unspecified < 77 | 77 |
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_ubuntu4.4MEDIUM
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Ubuntu
Firefox vulnerabilities
vendor_ubuntu·2020-06-04·CVSS 4.4
CVE-2020-12399 [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, spoof the
addressbar, or execute arbitrary code. (CVE-2020-12405, CVE-2020-12406,
CVE-2020-12407, CVE-2020-12408, CVE-2020-12409, CVE-2020-12410,
CVE-2020-12411)
It was discovered that NSS showed timing differences when performing DSA
signatures. An attacker could potentially exploit this to obtain private
keys using a timing attack. (CVE-2020-12399)
Instructions: After a standard system update you need to restart Firefox to make
all the necessary changes.
Debian
CVE-2020-12409: firefox - When using certain blank characters in a URL, they where incorrectly rendered as...
vendor_debian·2020·CVSS 8.8
CVE-2020-12409 [HIGH] CVE-2020-12409: firefox - When using certain blank characters in a URL, they where incorrectly rendered as...
When using certain blank characters in a URL, they where incorrectly rendered as spaces instead of an encoded URL. This vulnerability affects Firefox < 77.
Scope: local
sid: resolved (fixed in 77.0-1)
Mozilla
Mozilla Foundation Security Advisory 2020-20: CVE-2020-12409
vendor_mozilla·CVSS 8.8
CVE-2020-12409 [HIGH] Mozilla Foundation Security Advisory 2020-20: CVE-2020-12409
Mozilla Foundation Security Advisory 2020-20
CVE: CVE-2020-12409
Product: Firefox
Impact: high
Fixed in: Firefox 77
GHSA
GHSA-j545-cjf3-8m8v: When using certain blank characters in a URL, they where incorrectly rendered as spaces instead of an encoded URL
ghsa_unreviewed·2022-05-24
CVE-2020-12409 [MEDIUM] GHSA-j545-cjf3-8m8v: When using certain blank characters in a URL, they where incorrectly rendered as spaces instead of an encoded URL
When using certain blank characters in a URL, they where incorrectly rendered as spaces instead of an encoded URL. This vulnerability affects Firefox < 77.
OSV
firefox vulnerabilities
osv·2020-06-04·CVSS 4.4
CVE-2020-12405 [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, spoof the
addressbar, or execute arbitrary code. (CVE-2020-12405, CVE-2020-12406,
CVE-2020-12407, CVE-2020-12408, CVE-2020-12409, CVE-2020-12410,
CVE-2020-12411)
It was discovered that NSS showed timing differences when performing DSA
signatures. An attacker could potentially exploit this to obtain private
keys using a timing attack. (CVE-2020-12399)
OSV
CVE-2020-12409: When using certain blank characters in a URL, they where incorrectly rendered as spaces instead of an encoded URL
osv·2020-06-02·CVSS 8.8
CVE-2020-12409 [HIGH] CVE-2020-12409: When using certain blank characters in a URL, they where incorrectly rendered as spaces instead of an encoded URL
When using certain blank characters in a URL, they where incorrectly rendered as spaces instead of an encoded URL. This vulnerability affects Firefox < 77.
No detection rules found.
No public exploits indexed.
No writeups or analysis indexed.
2020-07-09
Published