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Ubuntu.comUB:CVE-2021-39562

HistorySep 20, 2021 - 12:00 a.m.

CVE-2021-39562

2021-09-2000:00:00

ubuntu.com

swftools

null pointer dereference

denial of service

20200710

filestream

makesubstream

stream.cc

unix

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

5.5

Attack Vector

LOCAL

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

REQUIRED

Scope

UNCHANGED

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

HIGH

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

EPSS

0.001

Percentile

23.5%

JSON

An issue was discovered in swftools through 20200710. A NULL pointer
dereference exists in the function FileStream::makeSubStream() located in
Stream.cc. It allows an attacker to cause Denial of Service.

OSVersionArchitecturePackageVersionFilename
ubuntu18.04noarchswftools< anyUNKNOWN
ubuntu16.04noarchswftools< anyUNKNOWN

OS	Version	Architecture	Package	Version	Filename
ubuntu	18.04	noarch	swftools	< any	UNKNOWN
ubuntu	16.04	noarch	swftools	< any	UNKNOWN

References

github.com/matthiaskramm/swftools/issues/98

launchpad.net/bugs/cve/CVE-2021-39562

nvd.nist.gov/vuln/detail/CVE-2021-39562

security-tracker.debian.org/tracker/CVE-2021-39562

www.cve.org/CVERecord?id=CVE-2021-39562

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

5.5

Attack Vector

LOCAL

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

REQUIRED

Scope

UNCHANGED

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

HIGH

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

EPSS

0.001

Percentile

23.5%

JSON

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