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ubuntucveUbuntu.comUB:CVE-2021-39514
HistorySep 20, 2021 - 12:00 a.m.

CVE-2021-39514

2021-09-2000:00:00
ubuntu.com
ubuntu.com
11
libjpeg
aclosslessscan
parsemcu
floating point exception
dos
vulnerability
security bug

CVSS2

4.3

Attack Vector

NETWORK

Attack Complexity

MEDIUM

Authentication

NONE

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

PARTIAL

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

CVSS3

6.5

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

REQUIRED

Scope

UNCHANGED

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

HIGH

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

EPSS

0.001

Percentile

34.7%

An issue was discovered in libjpeg through 2020021. An uncaught floating
point exception in the function ACLosslessScan::ParseMCU() located in
aclosslessscan.cpp. It allows an attacker to cause Denial of Service.

Bugs

Notes

Author Note
jdstrand libjpeg-turbo is a fork of libjpeg8
mdeslaur file doesn’t exist in libjpeg-turbo
eslerm libjpeg-turbo/libjpeg6b/libjpeg8/libjpeg9 are from different codebases only libjpeg is affected
OSVersionArchitecturePackageVersionFilename
ubuntu20.04noarchlibjpeg< anyUNKNOWN
ubuntu16.04noarchlibjpeg6b< anyUNKNOWN

CVSS2

4.3

Attack Vector

NETWORK

Attack Complexity

MEDIUM

Authentication

NONE

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

PARTIAL

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

CVSS3

6.5

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

REQUIRED

Scope

UNCHANGED

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

HIGH

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

EPSS

0.001

Percentile

34.7%

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