The remote Ubuntu 14.04 LTS / 16.04 LTS host has packages installed that are affected by multiple vulnerabilities as referenced in the USN-3184-1 advisory.

    It was discovered that the Irssi buf.pl script set incorrect permissions. A local attacker could use this     issue to retrieve another user's window contents. (CVE-2016-7553)

    Joseph Bisch discovered that Irssi incorrectly handled comparing nicks. A remote attacker could use this     issue to cause Irssi to crash, resulting in a denial of service, or possibly execute arbitrary code.
    (CVE-2017-5193)

    It was discovered that Irssi incorrectly handled invalid nick messages. A remote attacker could use this     issue to cause Irssi to crash, resulting in a denial of service, or possibly execute arbitrary code.
    (CVE-2017-5194)

    Joseph Bisch discovered that Irssi incorrectly handled certain incomplete control codes. A remote attacker     could use this issue to cause Irssi to crash, resulting in a denial of service, or possibly execute     arbitrary code. This issue only affected Ubuntu 16.04 LTS and Ubuntu 16.10. (CVE-2017-5195)

    Hanno Bck and Joseph Bisch discovered that Irssi incorrectly handled certain incomplete character     sequences. A remote attacker could use this issue to cause Irssi to crash, resulting in a denial of     service. This issue only affected Ubuntu 16.04 LTS and Ubuntu 16.10. (CVE-2017-5196)

    Hanno Bck discovered that Irssi incorrectly handled certain format strings. A remote attacker could use     this issue to cause Irssi to crash, resulting in a denial of service. (CVE-2017-5356)

Tenable has extracted the preceding description block directly from the Ubuntu security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

Security fix for CVE-2016-7553.

----

This is new version of irssi fixing security bugs, for details see upstream announcement:
https://github.com/irssi/irssi/releases/tag/0.8.20

Note that Tenable Network Security has extracted the preceding description block directly from the Fedora update system website.
Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

The IRC client irssi was updated to 0.8.20, fixing various bugs and security issues.

  - CVE-2016-7044: The unformat_24bit_color function in the     format parsing code in Irssi, when compiled with     true-color enabled, allowed remote attackers to cause a     denial of service (heap corruption and crash) via an     incomplete 24bit color code.

  - CVE-2016-7045: The format_send_to_gui function in the     format parsing code in Irssi allowed remote attackers to     cause a denial of service (heap corruption and crash)     via vectors involving the length of a string.

See https://irssi.org/security/irssi_sa_2016.txt for more details.

  - CVE-2016-7553: A information disclosure vulnerability in     irssi buf.pl

See https://irssi.org/2016/09/22/buf.pl-update/ for more information.

According to the version of the irssi package installed, the EulerOS installation on the remote host is affected by the following vulnerability :

  - The buf.pl script before 2.20 in Irssi before 0.8.20     uses weak permissions for the scrollbuffer dump file     created between upgrades, which might allow local users     to obtain sensitive information from private chat     conversations by reading the file.(CVE-2016-7553)

Note that Tenable Network Security has extracted the preceding description block directly from the EulerOS security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

Security fix for CVE-2016-7553.

Note that Tenable Network Security has extracted the preceding description block directly from the Fedora update system website.
Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

An information disclosure vulnerability was found in irssi.

CVE-2016-7553 Other users on the same machine as the user running irssi with buf.pl loaded may be able to retrieve the whole window contents after /UPGRADE. Furthermore, this dump of the windows contents is never removed afterwards.

For Debian 7 'Wheezy', this problems have been fixed in version 0.8.15-5+deb7u1.

We recommend that you upgrade your irssi packages.

NOTE: Tenable Network Security has extracted the preceding description block directly from the DLA security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available.

  - The buf.pl script before 2.20 in Irssi before 0.8.20 uses weak permissions for the scrollbuffer dump file     created between upgrades, which might allow local users to obtain sensitive information from private chat     conversations by reading the file. (CVE-2016-7553)

Note that Nessus relies on the presence of the package as reported by the vendor.

ID	Name	Product	Family	Published	Updated	Severity
96953	Ubuntu 14.04 LTS / 16.04 LTS : Irssi vulnerabilities (USN-3184-1)	Nessus	Ubuntu Local Security Checks	2/2/2017	8/27/2024	low
93972	Fedora 23 : irssi (2016-0551065fe0)	Nessus	Fedora Local Security Checks	10/12/2016	1/11/2021	high
93979	Fedora 24 : irssi (2016-a64716084e)	Nessus	Fedora Local Security Checks	10/12/2016	1/11/2021	high
94093	openSUSE Security Update : irssi (openSUSE-2016-2524)	Nessus	SuSE Local Security Checks	10/17/2016	1/19/2021	high
146671	EulerOS 2.0 SP2 : irssi (EulerOS-SA-2021-1306)	Nessus	Huawei Local Security Checks	2/22/2021	1/19/2024	low
149111	EulerOS 2.0 SP3 : irssi (EulerOS-SA-2021-1803)	Nessus	Huawei Local Security Checks	4/30/2021	1/3/2024	low
146140	EulerOS 2.0 SP5 : irssi (EulerOS-SA-2021-1197)	Nessus	Huawei Local Security Checks	2/4/2021	1/24/2024	low
94793	Fedora 25 : irssi (2016-39de4eb5e7)	Nessus	Fedora Local Security Checks	11/15/2016	1/11/2021	low
95358	Debian DLA-722-1 : irssi security update	Nessus	Debian Local Security Checks	11/28/2016	1/11/2021	low
219922	Linux Distros Unpatched Vulnerability : CVE-2016-7553	Nessus	Misc.	3/4/2025	3/4/2025	low

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