CVSS Meta Temp Score CVSS is a standardized scoring system to determine possibilities of attacks. The Temp Score considers temporal factors like disclosure, exploit and countermeasures. The unique Meta Score calculates the average score of different sources to provide a normalized scoring system.	Current Exploit Price (≈) Our analysts are monitoring exploit markets and are in contact with vulnerability brokers. The range indicates the observed or calculated exploit price to be seen on exploit markets. A good indicator to understand the monetary effort required for and the popularity of an attack.	CTI Interest Score Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.
6.1	$0-$5k	0.00

A vulnerability classified as problematic has been found in irssi up to 1.0.4 (Messaging Software). Affected is some unknown processing of the component Nick Handler. The manipulation with an unknown input leads to a null pointer dereference vulnerability. CWE is classifying the issue as CWE-476. A NULL pointer dereference occurs when the application dereferences a pointer that it expects to be valid, but is NULL, typically causing a crash or exit. This is going to have an impact on availability. CVE summarizes:

In Irssi before 1.0.5, overlong nicks or targets may result in a NULL pointer dereference while splitting the message.

The bug was discovered 10/22/2017. The weakness was shared 10/22/2017 (oss-sec). The advisory is shared for download at openwall.com. This vulnerability is traded as CVE-2017-15723 since 10/21/2017. The exploitability is told to be easy. It is possible to launch the attack remotely. The exploitation doesn't require any form of authentication. There are neither technical details nor an exploit publicly available.

The vulnerability scanner Nessus provides a plugin with the ID 104062 (FreeBSD : irssi -- multiple vulnerabilities (85e2c7eb-b74b-11e7-8546-5cf3fcfdd1f1)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family FreeBSD Local Security Checks and running in the context l. The commercial vulnerability scanner Qualys is able to test this issue with plugin 196957 (Ubuntu Security Notification for Irssi Vulnerabilities (USN-3465-1)).

Upgrading to version 1.0.5 eliminates this vulnerability. A possible mitigation has been published immediately after the disclosure of the vulnerability.

The vulnerability is also documented in the vulnerability database at Tenable (104062). The entries 108320, 108321, 108322 and 108323 are related to this item.

Productinfo

Type

• Messaging Software

Name

• irssi

Version

• 1.0.0
• 1.0.1
• 1.0.2
• 1.0.3
• 1.0.4

License

• open-source

CPE 2.3info

• 🔍
• 🔍
• 🔍

CPE 2.2info

• 🔍
• 🔍
• 🔍

CVSSv4info

VulDB CVSS-B Score: 🔍
VulDB CVSS-BT Score: 🔍
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.4
VulDB Meta Temp Score: 6.3

VulDB Base Score: 5.3
VulDB Temp Score: 5.1
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 7.5
NVD Vector: 🔍

CVSSv2info

AV	AC	Au	C	I	A
💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳

Vector	Complexity	Authentication	Confidentiality	Integrity	Availability
unlock	unlock	unlock	unlock	unlock	unlock
unlock	unlock	unlock	unlock	unlock	unlock
unlock	unlock	unlock	unlock	unlock	unlock

VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Class: Null pointer dereference
CWE: CWE-476 / CWE-404
ATT&CK: Unknown

Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

0-Day	unlock	unlock	unlock	unlock
Today	unlock	unlock	unlock	unlock

Nessus ID: 104062
Nessus Name: FreeBSD : irssi -- multiple vulnerabilities (85e2c7eb-b74b-11e7-8546-5cf3fcfdd1f1)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

OpenVAS ID: 53380
OpenVAS Name: Debian Security Advisory DSA 4016-1 (irssi - security update)
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

Reaction Time: 🔍
0-Day Time: 🔍
Exposure Time: 🔍

Upgrade: irssi 1.0.5

Timelineinfo

10/21/2017 🔍
10/22/2017 +1 days 🔍
10/22/2017 +0 days 🔍
10/22/2017 +0 days 🔍
10/22/2017 +0 days 🔍
10/23/2017 +1 days 🔍
10/23/2017 +0 days 🔍
01/19/2021 +1184 days 🔍

Sourcesinfo

Advisory: openwall.com
Status: Not defined
Confirmation: 🔍

CVE: CVE-2017-15723 (🔍)
OVAL: 🔍
See also: 🔍

Entryinfo

Created: 10/23/2017 09:07
Updated: 01/19/2021 13:06
Changes: 10/23/2017 09:07 (72), 11/28/2019 15:26 (2), 01/19/2021 13:06 (2)
Complete: 🔍

Discussion

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