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ubuntucveUbuntu.comUB:CVE-2020-6820
HistoryApr 03, 2020 - 12:00 a.m.

CVE-2020-6820

2020-04-0300:00:00
ubuntu.com
ubuntu.com
34

8.1 High

CVSS3

Attack Vector

NETWORK

Attack Complexity

HIGH

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

HIGH

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

6.8 Medium

CVSS2

Access Vector

NETWORK

Access Complexity

MEDIUM

Authentication

NONE

Confidentiality Impact

PARTIAL

Integrity Impact

PARTIAL

Availability Impact

PARTIAL

AV:N/AC:M/Au:N/C:P/I:P/A:P

0.009 Low

EPSS

Percentile

82.4%

JSON

Under certain conditions, when handling a ReadableStream, a race condition
can cause a use-after-free. We are aware of targeted attacks in the wild
abusing this flaw. This vulnerability affects Thunderbird < 68.7.0, Firefox
< 74.0.1, and Firefox ESR < 68.6.1.

Notes

Author Note
tyhicks mozjs contains a copy of the SpiderMonkey JavaScript engine
OSVersionArchitecturePackageVersionFilename
ubuntu18.04noarchfirefox< 74.0.1+build1-0ubuntu0.18.04.1UNKNOWN
ubuntu19.10noarchfirefox< 74.0.1+build1-0ubuntu0.19.10.1UNKNOWN
ubuntu20.04noarchfirefox< 75.0+build3-0ubuntu1UNKNOWN
ubuntu16.04noarchfirefox< 74.0.1+build1-0ubuntu0.16.04.1UNKNOWN
ubuntu18.04noarchthunderbird< 1:68.7.0+build1-0ubuntu0.18.04.1UNKNOWN
ubuntu19.10noarchthunderbird< 1:68.7.0+build1-0ubuntu0.19.10.1UNKNOWN
ubuntu20.04noarchthunderbird< 1:68.7.0+build1-0ubuntu1UNKNOWN
ubuntu16.04noarchthunderbird< 1:68.7.0+build1-0ubuntu0.16.04.2UNKNOWN

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8.1 High

CVSS3

Attack Vector

NETWORK

Attack Complexity

HIGH

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

HIGH

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

6.8 Medium

CVSS2

Access Vector

NETWORK

Access Complexity

MEDIUM

Authentication

NONE

Confidentiality Impact

PARTIAL

Integrity Impact

PARTIAL

Availability Impact

PARTIAL

AV:N/AC:M/Au:N/C:P/I:P/A:P

0.009 Low

EPSS

Percentile

82.4%

JSON
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