What is the severity of CVE-2017-15721?

CVE-2017-15721 has been classified as a high severity vulnerability due to its potential to cause a NULL pointer dereference.

How do I fix CVE-2017-15721?

To fix CVE-2017-15721, update Irssi to version 1.0.5 or later, or apply the relevant security patches provided by your Linux distribution.

Which versions of Irssi are affected by CVE-2017-15721?

CVE-2017-15721 affects Irssi versions prior to 1.0.5, including version 1.0.4 and earlier.

What kind of attack does CVE-2017-15721 facilitate?

CVE-2017-15721 could potentially allow an attacker to crash the Irssi client through malformed DCC CTCP messages.

Is CVE-2017-15721 related to any other vulnerabilities?

Yes, CVE-2017-15721 is related to CVE-2017-9468, addressing similar issues in the handling of DCC CTCP messages.

Vulnerability/
CVE-2017-15721

high

7.5

CWE

476

22/10/2017

5/8/2024

CVE-2017-15721: Null Pointer Dereference

First published: Sun Oct 22 2017(Updated: )

In Irssi before 1.0.5, certain incorrectly formatted DCC CTCP messages could cause a NULL pointer dereference. This is a separate, but similar, issue relative to CVE-2017-9468.

Credit: cve@mitre.org

Affected Software	Affected Version	How to fix
Irssi Irssi	<=1.0.4
Debian Debian Linux	=7.0
Debian Debian Linux	=8.0
Debian Debian Linux	=9.0
debian/irssi		1.2.0-2+deb10u1 1.2.3-1 1.4.3-2 1.4.5-1

Remedy

http://openwall.com/lists/oss-security/2017/10/22/4

Remedy

https://irssi.org/security/irssi_sa_2017_10.txt

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Reference Links

Frequently Asked Questions

What is the severity of CVE-2017-15721?
CVE-2017-15721 has been classified as a high severity vulnerability due to its potential to cause a NULL pointer dereference.
How do I fix CVE-2017-15721?
To fix CVE-2017-15721, update Irssi to version 1.0.5 or later, or apply the relevant security patches provided by your Linux distribution.
Which versions of Irssi are affected by CVE-2017-15721?
CVE-2017-15721 affects Irssi versions prior to 1.0.5, including version 1.0.4 and earlier.
What kind of attack does CVE-2017-15721 facilitate?
CVE-2017-15721 could potentially allow an attacker to crash the Irssi client through malformed DCC CTCP messages.
Is CVE-2017-15721 related to any other vulnerabilities?
Yes, CVE-2017-15721 is related to CVE-2017-9468, addressing similar issues in the handling of DCC CTCP messages.

collector/security-tracker-debian
agent/references
agent/type
agent/remedy
agent/softwarecombine
collector/mitre-cve
source/MITRE
agent/severity
agent/author
agent/last-modified-date
agent/description
agent/first-publish-date
agent/event
agent/source
agent/tags
collector/nvd-index
agent/software-canonical-lookup-request
agent/weakness
package-manager/debian
vendor/irssi
canonical/irssi irssi
version/irssi irssi/1.0.4
vendor/debian
canonical/debian debian linux
version/debian debian linux/7.0
version/debian debian linux/8.0
version/debian debian linux/9.0

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Frequently Asked Questions

What is the severity of CVE-2017-15721?
CVE-2017-15721 has been classified as a high severity vulnerability due to its potential to cause a NULL pointer dereference.
How do I fix CVE-2017-15721?
To fix CVE-2017-15721, update Irssi to version 1.0.5 or later, or apply the relevant security patches provided by your Linux distribution.
Which versions of Irssi are affected by CVE-2017-15721?
CVE-2017-15721 affects Irssi versions prior to 1.0.5, including version 1.0.4 and earlier.
What kind of attack does CVE-2017-15721 facilitate?
CVE-2017-15721 could potentially allow an attacker to crash the Irssi client through malformed DCC CTCP messages.
Is CVE-2017-15721 related to any other vulnerabilities?
Yes, CVE-2017-15721 is related to CVE-2017-9468, addressing similar issues in the handling of DCC CTCP messages.