Zarthus IRC Twitter Announcer Bot up to 1.1.0 twitter_announcer.rb get_tweets tweet command injection

EntryHistoryDiffjsonxmlCTI

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.
4.8	$0-$5k	1.15

A vulnerability, which was classified as critical, was found in Zarthus IRC Twitter Announcer Bot up to 1.1.0 (Social Network Software). This affects the function get_tweets of the file lib/twitterbot/plugins/twitter_announcer.rb. The manipulation of the argument tweet with an unknown input leads to a command injection vulnerability. CWE is classifying the issue as CWE-77. The software constructs all or part of a command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended command when it is sent to a downstream component. This is going to have an impact on confidentiality, integrity, and availability.

The weakness was presented 03/18/2023 as 6b1941b7fc2c70e1f40981b43c84a2c20cc12bd3. It is possible to read the advisory at github.com. This vulnerability is uniquely identified as CVE-2015-10096. Technical details of the vulnerability are known, but there is no available exploit. The attack technique deployed by this issue is T1202 according to MITRE ATT&CK.

Upgrading to version 1.1.1 eliminates this vulnerability. The upgrade is hosted for download at github.com. Applying the patch 6b1941b7fc2c70e1f40981b43c84a2c20cc12bd3 is able to eliminate this problem. The bugfix is ready for download at github.com. The best possible mitigation is suggested to be upgrading to the latest version. The advisory contains the following remark:

Prevent edge-case exploitation that allows execution of arbitrary fantasy commands.

This commit replaces \r\n with '. ' in tweets.

An edge-case issue where you may be able to exploit the bot having op.
Should you be the one being tracked, you could insert a newline in your tweet, and follow it up for "!ban <someone>" to execute a fantasy command.

This exploit requires a lot of requirements to be met. Mainly the fact that the bot has permissions in the channel, and that the followed person is associated and aware of the possibility.

Productinfo

Type

Social Network Software

Vendor

Zarthus

Name

IRC Twitter Announcer Bot

License

open-source

CPE 2.3info

CPE 2.2info

CVSSv3info

VulDB Meta Base Score: 5.0
VulDB Meta Temp Score: 4.8

VulDB Base Score: 5.0
VulDB Temp Score: 4.8
VulDB Vector: 🔒
VulDB Reliability: 🔍

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: 🔍

Exploitinginfo

Class: Command injection
CWE: CWE-77 / CWE-74 / CWE-707
ATT&CK: T1202

Local: No
Remote: Yes

Availability: 🔒
Status: Not defined

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒