What is the severity of CVE-2021-39559?

CVE-2021-39559 is classified as a Denial of Service vulnerability.

How do I fix CVE-2021-39559?

To mitigate CVE-2021-39559, update SWFTools to a version released after 2020-07-10.

What causes the vulnerability in CVE-2021-39559?

CVE-2021-39559 is caused by a NULL pointer dereference in the GString destructor.

Which versions of SWFTools are affected by CVE-2021-39559?

SWFTools versions up to and including 2020-07-10 are affected by CVE-2021-39559.

Can CVE-2021-39559 be exploited remotely?

Yes, an attacker can exploit CVE-2021-39559 to cause Denial of Service remotely.

Vulnerability/
CVE-2021-39559

medium

5.5

CWE

476

20/9/2021

4/8/2024

CVE-2021-39559: Null Pointer Dereference

First published: Mon Sep 20 2021(Updated: )

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

Credit: cve@mitre.org

Affected Software	Affected Version	How to fix
SWFTools	<=2020-07-10

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Reference Links

https://github.com/matthiaskramm/swftools/issues/101

Frequently Asked Questions

What is the severity of CVE-2021-39559?
CVE-2021-39559 is classified as a Denial of Service vulnerability.
How do I fix CVE-2021-39559?
To mitigate CVE-2021-39559, update SWFTools to a version released after 2020-07-10.
What causes the vulnerability in CVE-2021-39559?
CVE-2021-39559 is caused by a NULL pointer dereference in the GString destructor.
Which versions of SWFTools are affected by CVE-2021-39559?
SWFTools versions up to and including 2020-07-10 are affected by CVE-2021-39559.
Can CVE-2021-39559 be exploited remotely?
Yes, an attacker can exploit CVE-2021-39559 to cause Denial of Service remotely.

agent/type
agent/softwarecombine
collector/mitre-cve
source/MITRE
agent/severity
agent/references
agent/author
agent/last-modified-date
agent/weakness
agent/first-publish-date
agent/event
agent/description
agent/source
agent/tags
collector/nvd-index
agent/software-canonical-lookup-request
vendor/swftools
canonical/swftools
version/swftools/2020-07-10

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Frequently Asked Questions

What is the severity of CVE-2021-39559?
CVE-2021-39559 is classified as a Denial of Service vulnerability.
How do I fix CVE-2021-39559?
To mitigate CVE-2021-39559, update SWFTools to a version released after 2020-07-10.
What causes the vulnerability in CVE-2021-39559?
CVE-2021-39559 is caused by a NULL pointer dereference in the GString destructor.
Which versions of SWFTools are affected by CVE-2021-39559?
SWFTools versions up to and including 2020-07-10 are affected by CVE-2021-39559.
Can CVE-2021-39559 be exploited remotely?
Yes, an attacker can exploit CVE-2021-39559 to cause Denial of Service remotely.