PT-2018-1311

Name of the Vulnerable Software and Affected Versions Microsoft Windows VBScript Engine versions prior to the fixed version Description A remote code execution issue exists in the way the VBScript engine handles objects in memory. This allows remote attackers to execute arbitrary code and affect...

FreeBSD : Gitlab -- multiple vulnerabilities (085a087b-3897-11e8-ac53-d8cb8abf62dd)

GitLab reports : Confidential issue comments in Slack, Mattermost, and webhook integrations. Persistent XSS in milestones data-milestone-id. Persistent XSS in filename of merge request. C Tenable Network Security, Inc. The descriptive text and package checks in this plugin were extracted from the...

Slack: HTTP parameter pollution from outdated Greenhouse.io JS dependency

Slack's career page was using an outdated Greenhouse JavaScript dependency which resulted in an HTTP parameter pollution vulnerability. This would have allowed the loading of external Greenhouse forms not owned by Slack. We updated the Javascript and the issue is resolved. Thanks @irvinlim! The...

Slack: TURN server allows TCP and UDP proxying to internal network, localhost and meta-data services

The TURN servers used by Slack allow TCP connections and UDP packets to be proxied to the internal network. This gives an attacker the ability to scan and interact with internal systems. The attacker may proxy TCP connections to the internal network by setting the XOR-PEER-ADDRESS of the TURN...

Slack Technologies Slack URI Parsing Command Injection Remote Code Execution Vulnerability

This vulnerability allows remote attackers to execute arbitrary code on vulnerable installations of Slack Technologies Slack. User interaction is required to exploit this vulnerability in that the target must visit a malicious page or open a malicious file. The specific flaw exists within the...

Slack: Invitation reminder emails contain insecure links

If one gets invited to a slack channel and does not act upon the invitation a while later a reminder email is sent. The links in these reminders are http links. Excerpt from the mail: ---------------------- Don’t miss out — come join the conversation! Join Now...

radio4all.net XSS vulnerability

Open Bug Bounty ID: OBB-574683 Description| Value ---|--- Affected Website:| radio4all.net Open Bug Bounty Program:| Create your bounty program now. It's open and free. Vulnerable Application:| Custom Code Vulnerability Type:| XSS Cross Site Scripting / CWE-79 CVSSv3 Score:| 6.1...

Slack: HTML Injection inside Slack promotional emails

Hi, There's a HTML injection vulnerability present inside emails sent from slack when the FIRST name on the account contains HTML. The html is stored in the backend database and when emails are sent promotional, etc, the HTML is sent along with the rest of the email. In my PoC, which is provided...

Slack: Information leakage and default open port

@freem0 found Prometheus plugin output that was exposed at one of our servers. The information exposed including some OS information metrics about memory usage, but no customer data was at risk and no exploit was possible. Thank you @freem0!...

Man-in-the-Middle (MitM)

github.com/nlopes/slack is vulnerable to man-in-the-middle MitM attacks. The vulnerability exists due to the usage of hardcoded non-HTTPS Slack API URL...

Slack: Shared-channel BETA persists integration after unshare

@oneiroi discovered a bug in the Shared Channels Beta wherein notifications may still be delivered to an unshared channel previously shared. This did not affect data not in notifications, and we patched and performed a thorough investigation. Thanks for the report @oneiroi!...

Slack Plugs ‘Severe’ SAML User Authentication Hole

Cloud-based communications platform Slack finished patching a severe security hole Thursday affecting portions of its platform that used the Security Assertion Markup Language SAML standard for user authentication. The flawed implementation of SAML by Slack impacted mostly enterprise customers wh...

Slack SAML authentication bypass

tl;dr I found a severe issue in the Slack's SAML implementation that allowed me to bypass the authentication. This has now been solved by Slack. Introduction IMHO the rule 1 of any bug hunter note I do not consider myself one of them since I do this really sporadically is to have a good RSS feed...

Slack: Unauthenticated LFI revealing log information

@juji found a bug which allowed the disclosure of local files on certain servers - this included PHP files and logs. We performed a thorough investigation to ensure that this issue was not exploited, and as a precaution revoked tokens which were inadvertently logged. Thanks @juji! Write-up...

Slack: The Custom Emoji Page has a Reflected XSS

The Custom Emoji Page has a Reflected XSS in building flash message. The following is the PoC. https://team.slack.com/customize/emoji?added=1&name=vuln"alert0;...

Hackers Leverage Chat for Command&Control: How You Can Protect Your Business

Chat platforms have become a cornerstone for businesses and their customers alike. These important tools make it possible for employees to communicate and collaborate from nearly any location, and enable consumers to reach out to companies in accordance with their preferences. This fondness for...

Salt Open Linux Vulnerability Scanner: Salt Scanner

Salt Open Linux Vulnerability Scanner A linux vulnerability scanner based on Vulners Audit API and Salt Open, with Slack notifications. Requirements Salt Open salt-master, salt-minion¹ Python 2.7 Salt pip install salt==2016.11.5 Slackclient pip install slackclient==1.0.5 Usage root@localhost pyth...

Slack: Many Slack teams can be joined by abusing an improperly configured support@ inbox

@securinti informed us of support portals configured in manners which allowed for abuse. This is not an issue with Slack itself, but we were able to make a change to help mitigate this for such insecure configurations. Thank you!...

Slack: Uninstalling Slack for Windows (64-bit), then reinstalling keeps you logged in without authentication

I understand that you are unlikely to consider bugs that require physical machine access, however this issue affected me directly and I was very surprised by it, so I felt it was important to report it in case it was not known. Steps to reproduce: 1 Install the desktop Slack app for Windows 64-bi...

Gratipay: Unauthorized access to the slack channel via inside.gratipay.com/appendices/chat

Summary It is possible to force send invites for gratipay slack channel to arbitary email ids with no bruteforce limit. This is done by modifying the coc parameter to 1 in the POST data sent from https://inside.gratipay.com/appendices/chat Description Sending a post request with coc parameter set...