Ubuntu.comUB:CVE-2020-26951CVE-2020-26951
6.1 Medium
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
CHANGED
Confidentiality Impact
LOW
Integrity Impact
LOW
Availability Impact
NONE
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
4.3 Medium
CVSS2
Access Vector
NETWORK
Access Complexity
MEDIUM
Authentication
NONE
Confidentiality Impact
NONE
Integrity Impact
PARTIAL
Availability Impact
NONE
AV:N/AC:M/Au:N/C:N/I:P/A:N
0.001 Low
EPSS
Percentile
35.7%
A parsing and event loading mismatch in Firefox’s SVG code could have
allowed load events to fire, even after sanitization. An attacker already
capable of exploiting an XSS vulnerability in privileged internal pages
could have used this attack to bypass our built-in sanitizer. This
vulnerability affects Firefox < 83, Firefox ESR < 78.5, and Thunderbird <
78.5.
Notes
| Author | Note |
|---|---|
| tyhicks | mozjs contains a copy of the SpiderMonkey JavaScript engine |
| OS | Version | Architecture | Package | Version | Filename |
|---|---|---|---|---|---|
| ubuntu | 18.04 | noarch | firefox | < 83.0+build2-0ubuntu0.18.04.2 | UNKNOWN |
| ubuntu | 20.04 | noarch | firefox | < 83.0+build2-0ubuntu0.20.04.1 | UNKNOWN |
| ubuntu | 20.10 | noarch | firefox | < 83.0+build2-0ubuntu0.20.10.1 | UNKNOWN |
| ubuntu | 21.04 | noarch | firefox | < 83.0+build2-0ubuntu1 | UNKNOWN |
| ubuntu | 21.10 | noarch | firefox | < 83.0+build2-0ubuntu1 | UNKNOWN |
| ubuntu | 22.04 | noarch | firefox | < 83.0+build2-0ubuntu1 | UNKNOWN |
| ubuntu | 22.10 | noarch | firefox | < 83.0+build2-0ubuntu1 | UNKNOWN |
| ubuntu | 23.04 | noarch | firefox | < 83.0+build2-0ubuntu1 | UNKNOWN |
| ubuntu | 23.10 | noarch | firefox | < 83.0+build2-0ubuntu1 | UNKNOWN |
| ubuntu | 24.04 | noarch | firefox | < 83.0+build2-0ubuntu1 | UNKNOWN |
References
launchpad.net/bugs/cve/CVE-2020-26951
nvd.nist.gov/vuln/detail/CVE-2020-26951
security-tracker.debian.org/tracker/CVE-2020-26951
ubuntu.com/security/notices/USN-4637-1
ubuntu.com/security/notices/USN-4637-2
ubuntu.com/security/notices/USN-4647-1
www.cve.org/CVERecord?id=CVE-2020-26951
www.mozilla.org/en-US/security/advisories/mfsa2020-50/#CVE-2020-26951
www.mozilla.org/en-US/security/advisories/mfsa2020-52/#CVE-2020-26951
Related
6.1 Medium
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
CHANGED
Confidentiality Impact
LOW
Integrity Impact
LOW
Availability Impact
NONE
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
4.3 Medium
CVSS2
Access Vector
NETWORK
Access Complexity
MEDIUM
Authentication
NONE
Confidentiality Impact
NONE
Integrity Impact
PARTIAL
Availability Impact
NONE
AV:N/AC:M/Au:N/C:N/I:P/A:N
0.001 Low
EPSS
Percentile
35.7%