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ubuntucveUbuntu.comUB:CVE-2020-26951
HistoryNov 17, 2020 - 12:00 a.m.

CVE-2020-26951

2020-11-1700:00:00
ubuntu.com
ubuntu.com
131

4.3 Medium

CVSS2

Attack Vector

NETWORK

Attack 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

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

0.001 Low

EPSS

Percentile

36.8%

JSON

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
OSVersionArchitecturePackageVersionFilename
ubuntu18.04noarchfirefox< 83.0+build2-0ubuntu0.18.04.2UNKNOWN
ubuntu20.04noarchfirefox< 83.0+build2-0ubuntu0.20.04.1UNKNOWN
ubuntu20.10noarchfirefox< 83.0+build2-0ubuntu0.20.10.1UNKNOWN
ubuntu21.04noarchfirefox< 83.0+build2-0ubuntu1UNKNOWN
ubuntu21.10noarchfirefox< 83.0+build2-0ubuntu1UNKNOWN
ubuntu22.04noarchfirefox< 83.0+build2-0ubuntu1UNKNOWN
ubuntu22.10noarchfirefox< 83.0+build2-0ubuntu1UNKNOWN
ubuntu23.04noarchfirefox< 83.0+build2-0ubuntu1UNKNOWN
ubuntu23.10noarchfirefox< 83.0+build2-0ubuntu1UNKNOWN
ubuntu24.04noarchfirefox< 83.0+build2-0ubuntu1UNKNOWN
Rows per page:
1-10 of 251

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Security Vulnerabilities fixed in Firefox ESR 78.5 — Mozilla
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4.3 Medium

CVSS2

Attack Vector

NETWORK

Attack 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

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

0.001 Low

EPSS

Percentile

36.8%

JSON
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