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ubuntucveUbuntu.comUB:CVE-2021-23977
HistoryFeb 26, 2021 - 12:00 a.m.

CVE-2021-23977

2021-02-2600:00:00
ubuntu.com
ubuntu.com
20
firefox
android
vulnerability
sensitive data
directories
operating systems
affected
mozjs
spidermonkey
javascript engine

CVSS2

2.6

Attack Vector

NETWORK

Attack Complexity

HIGH

Authentication

NONE

Confidentiality Impact

PARTIAL

Integrity Impact

NONE

Availability Impact

NONE

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

CVSS3

5.3

Attack Vector

NETWORK

Attack Complexity

HIGH

Privileges Required

NONE

User Interaction

REQUIRED

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

NONE

Availability Impact

NONE

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

EPSS

0.002

Percentile

51.3%

Firefox for Android suffered from a time-of-check-time-of-use vulnerability
that allowed a malicious application to read sensitive data from
application directories. Note: This issue is only affected Firefox for
Android. Other operating systems are unaffected. This vulnerability affects
Firefox < 86.

Notes

Author Note
tyhicks mozjs contains a copy of the SpiderMonkey JavaScript engine

CVSS2

2.6

Attack Vector

NETWORK

Attack Complexity

HIGH

Authentication

NONE

Confidentiality Impact

PARTIAL

Integrity Impact

NONE

Availability Impact

NONE

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

CVSS3

5.3

Attack Vector

NETWORK

Attack Complexity

HIGH

Privileges Required

NONE

User Interaction

REQUIRED

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

NONE

Availability Impact

NONE

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

EPSS

0.002

Percentile

51.3%