Day[0]

Latest Episodes:

[bounty] Spring4Shell, PEAR Bugs, and GitLab Hardcoded Passwords Apr 05, 2022

Show notes

Links and vulnerability summaries for this episode are available at: https://dayzerosec.com/podcast/spring4shell-pear-bugs-and-gitlab-hardcoded-passwords.html

This week we have some fun with some bugs that really shouldn't have passed code-review, we of course talk about Spring4Shell/SpringShell and dive into the decade long history of that bug, and a bit of discussion about triaging more subtle bugs.

[00:00:29] [Stripe] CSRF token validation system is disabled

[00:09:42] GitLab Account Takeover with Hardcoded Password

[00:21:22] Spring4Shell: Security Analysis of the latest Java RCE '0-day' vulnerabilities in Spring

[00:37:49] PHP Supply Chain Attack on PEAR

[00:52:16] Finding bugs that doesn’t exists

The DAY[0] Podcast episodes are streamed live on Twitch (@dayzerosec) twice a week:

Mondays at 3:00pm Eastern (Boston) we focus on web and more bug bounty style vulnerabilities
Tuesdays at 7:00pm Eastern (Boston) we focus on lower-level vulnerabilities and exploits.

The Video archive can be found on our Youtube channel: https://www.youtube.com/c/dayzerosec

You can also join our discord: https://discord.gg/daTxTK9

Or follow us on Twitter (@dayzerosec) to know when new releases are coming.

[binary] Pwning WD NAS, NetGear Routers, and Overflowing Kernel Pages Mar 31, 2022

Show notes

Links and vulnerability summaries for this episode are available at: https://dayzerosec.com/podcast/pwning-wd-nas-netgear-routers-and-overflowing-kernel-pages.html

Plenty of exploit strategy talk this week with vulnerabilities and complete exploits targeting a NAS, a router, and a Linux Kernel module with a page-level overflow.

[00:00:26] Spot the Vuln - Normalized Regex

[00:01:52] Remote Code Execution on Western Digital PR4100 NAS (CVE-2022-23121)

[00:07:10] Defeating the Netgear R6700v3

[00:18:36] Exploit esp6 modules in Linux kernel [CVE-2022-27666]

[00:27:17] Racing against the clock -- hitting a tiny kernel race window

The DAY[0] Podcast episodes are streamed live on Twitch (@dayzerosec) twice a week:

Mondays at 3:00pm Eastern (Boston) we focus on web and more bug bounty style vulnerabilities
Tuesdays at 7:00pm Eastern (Boston) we focus on lower-level vulnerabilities and exploits.

The Video archive can be found on our Youtube channel: https://www.youtube.com/c/dayzerosec

You can also join our discord: https://discord.gg/daTxTK9

Or follow us on Twitter (@dayzerosec) to know when new releases are coming.

[bounty] GitLab Arbitrary File Read and Bypassing PHP's filter_var Mar 29, 2022

Show notes

Links and vulnerability summaries for this episode are available at: https://dayzerosec.com/podcast/gitlab-arbitrary-file-read-and-bypassing-php-s-filter-var.html

Some easy vulnerabilities this week, a directory traversal due to a bad regex, a simply yet somewhat mysterious authentication bypass, arbitrary file read in GitLab thanks to archives with symlinks, and a PHP filter_var bypass.

[00:00:25] elFinder: The story of a repwning

[00:11:56] Authentication bypass using root array

[00:17:04] [GitLab] Arbitrary file read via the bulk imports UploadsPipeline

[00:19:54] PHP filter_var shenanigans

[00:30:26] Quick Thoughts on Finding a Mentor

The DAY[0] Podcast episodes are streamed live on Twitch (@dayzerosec) twice a week:

Mondays at 3:00pm Eastern (Boston) we focus on web and more bug bounty style vulnerabilities
Tuesdays at 7:00pm Eastern (Boston) we focus on lower-level vulnerabilities and exploits.

The Video archive can be found on our Youtube channel: https://www.youtube.com/c/dayzerosec

You can also join our discord: https://discord.gg/daTxTK9

Or follow us on Twitter (@dayzerosec) to know when new releases are coming.

[binary] Chrome Heap OOB Access and TLStorm Mar 24, 2022

Show notes

Links and vulnerability summaries for this episode are available at: https://dayzerosec.com/podcast/chrome-heap-oob-access-and-tlstorm.html

A few issues this week, a OOB access in chrome and in the Linux Kernel's Netfilter, and a few issues in Smart UPS devices.

[00:00:17] Spot the Vuln - Where's My Token

[00:03:21] Chrome: heap-buffer-overflow in chrome_pdf::PDFiumEngine::RequestThumbnail

[00:06:23] TLStorm - Three Critical Vulnerabilities in Smart-UPS devices

[00:15:59] The Discovery and Exploitation of CVE-2022-25636

The DAY[0] Podcast episodes are streamed live on Twitch (@dayzerosec) twice a week:

Mondays at 3:00pm Eastern (Boston) we focus on web and more bug bounty style vulnerabilities
Tuesdays at 7:00pm Eastern (Boston) we focus on lower-level vulnerabilities and exploits.

The Video archive can be found on our Youtube channel: https://www.youtube.com/c/dayzerosec

You can also join our discord: https://discord.gg/daTxTK9

Or follow us on Twitter (@dayzerosec) to know when new releases are coming.

[bounty] DOMPDF XSS to RCE, Chrome Leaking Envrionment Vars, and cr8escape Mar 22, 2022

Show notes

Links and vulnerability summaries for this episode are available at: https://dayzerosec.com/podcast/dompdf-xss-to-rce-chrome-leaking-envrionment-vars-and-cr8escape.html

Several easy issues this week from leaking envrionment variables, to gaining host code execution and an XSS to RCE.

[00:01:15] Chrome, Edge and Opera - System environment variables leak [CVE-2022-0337]

[00:10:05] [Yoti] Pin Bruteforce Rate-Limiting Bypass

[00:21:58] From XSS to RCE (dompdf 0day)

[00:31:49] cr8escape: New Vulnerability in CRI-O Container Engine [CVE-2022-0811]

The DAY[0] Podcast episodes are streamed live on Twitch (@dayzerosec) twice a week:

Mondays at 3:00pm Eastern (Boston) we focus on web and more bug bounty style vulnerabilities
Tuesdays at 7:00pm Eastern (Boston) we focus on lower-level vulnerabilities and exploits.

The Video archive can be found on our Youtube channel: https://www.youtube.com/c/dayzerosec

You can also join our discord: https://discord.gg/daTxTK9

Or follow us on Twitter (@dayzerosec) to know when new releases are coming.

[binary] A Windows UAF, Branch Prediction Bugs, and an io_uring Exploit Mar 17, 2022

Show notes

Links and vulnerability summaries for this episode are available at: https://dayzerosec.com/podcast/a-windows-uaf-branch-prediction-bugs-and-an-io-uring-exploit.html

This time as we get side tracked with a couple discussions, first about security through obscurity, secondly about the nvidia leaks. We also have our usual mix of vulnerabilities this week, a cool exploit in the Linux kernel, a use-after-free in Windows Common Logging File System, and some speculative execution issues.

[00:00:43] Spot the Vuln - Do You Even HMAC?

[00:05:49] Put an io_uring on it: Exploiting the Linux Kernel

[00:26:18] Discussion: Security through Obscurity in the Linux Kernel

[00:34:20] Exploiting a use-after-free in Windows Common Logging File System (CLFS)

[00:43:57] The AMD Branch (Mis)predictor Part 2: Where No CPU has Gone Before [CVE-2021-26341]

[00:56:20] Branch History Injection

[01:04:25] Chat Question: About the Nvidia Leak

The DAY[0] Podcast episodes are streamed live on Twitch (@dayzerosec) twice a week:

Mondays at 3:00pm Eastern (Boston) we focus on web and more bug bounty style vulnerabilities
Tuesdays at 7:00pm Eastern (Boston) we focus on lower-level vulnerabilities and exploits.

The Video archive can be found on our Youtube channel: https://www.youtube.com/c/dayzerosec

You can also join our discord: https://discord.gg/daTxTK9

Or follow us on Twitter (@dayzerosec) to know when new releases are coming.

[bounty] Pascom RCE, AutoWarp, and a GKE Container Escape Mar 15, 2022

Show notes

Links and vulnerability summaries for this episode are available at: https://dayzerosec.com/podcast/pascom-rce-autowarp-and-a-gke-container-escape.html

We've got some cloud issues this week, in Azure Automation and GKE Autopilot along with a couple other interesting chains.

[00:02:11] Pascom: The story of 3 bugs that lead to unauthed RCE

[00:12:37] How I Made +$16,500 Hacking CDN Caching Servers - Part 2

[00:17:16] AutoWarp Microsoft Azure Automation Vulnerability

[00:23:19] Container Escape to Shadow Admin: GKE Autopilot Vulnerabilities

The DAY[0] Podcast episodes are streamed live on Twitch (@dayzerosec) twice a week:

Mondays at 3:00pm Eastern (Boston) we focus on web and more bug bounty style vulnerabilities
Tuesdays at 7:00pm Eastern (Boston) we focus on lower-level vulnerabilities and exploits.

The Video archive can be found on our Youtube channel: https://www.youtube.com/c/dayzerosec

You can also join our discord: https://discord.gg/daTxTK9

Or follow us on Twitter (@dayzerosec) to know when new releases are coming.

[binary] Dirty Pipe and Analyzing Memory Tagging Mar 10, 2022

Show notes

Links and vulnerability summaries for this episode are available at: https://dayzerosec.com/podcast/dirty-pipe-and-analyzing-memory-tagging.html

No spot the vuln this week, but we do have a cool kernel bug, "Dirty Pipe", a look at a stack based overflow: BrokenPrint, and finally some discussion about memory tagging.

[00:00:31] The Dirty Pipe Vulnerability

[00:18:26] BrokenPrint: A Netgear stack overflow

[00:30:21] Security Analysis of MTE Through Examples [BHIL2022]

The DAY[0] Podcast episodes are streamed live on Twitch (@dayzerosec) twice a week:

Mondays at 3:00pm Eastern (Boston) we focus on web and more bug bounty style vulnerabilities
Tuesdays at 7:00pm Eastern (Boston) we focus on lower-level vulnerabilities and exploits.

The Video archive can be found on our Youtube channel: https://www.youtube.com/c/dayzerosec

You can also join our discord: https://discord.gg/daTxTK9

Or follow us on Twitter (@dayzerosec) to know when new releases are coming.

[bounty] Facebook Exploits, pfSense RCE, and MySQLjs SQLi Mar 08, 2022

Show notes

Links and vulnerability summaries for this episode are available at: https://dayzerosec.com/podcast/facebook-exploits-pfsense-rce-and-mysqljs-sqli.html

A few interesting issues you this week, a JS race condition in some auth related code for Facebook, some fake prepared queries, and a RCE through sed commands (in pfSense)

[00:00:56] Remote Code Execution in pfSense (2.5.2 and earlier)

[00:06:13] Finding an Authorization Bypass on my Own Website

[00:17:43] More secure Facebook Canvas Part 2: More Account Takeovers

[00:32:43] The perils of the “real” client IP

The DAY[0] Podcast episodes are streamed live on Twitch (@dayzerosec) twice a week:

Mondays at 3:00pm Eastern (Boston) we focus on web and more bug bounty style vulnerabilities
Tuesdays at 7:00pm Eastern (Boston) we focus on lower-level vulnerabilities and exploits.

The Video archive can be found on our Youtube channel: https://www.youtube.com/c/dayzerosec

You can also join our discord: https://discord.gg/daTxTK9

Or follow us on Twitter (@dayzerosec) to know when new releases are coming.

[binary] ImageGear JPEG Vulns, NetFilter, and a LibCurl Memory Disclosure Mar 03, 2022

Show notes

Links and vulnerability summaries for this episode are available at: https://dayzerosec.com/podcast/imagegear-jpeg-vulns-netfilter-and-libcurl.html

Quick episode with four somewhat simple bugs in JPEG parsing, a remote memory disclosure in libcurl due to the difference `sizeof(long)` on Linux vs Windows, and a heap out of bounds write in the Linux Kernel.

[00:00:16] Spot the Vuln - One of a Kind

[00:03:14] Accusoft ImageGear JPEG-JFIF Scan header parser out-of-bounds write vulnerability

[00:07:15] Accusoft ImageGear Palette box parser heap-based buffer overflow vulnerability

[00:11:55] Remote memory disclosure vulnerability in libcurl on 64 Bit Windows

[00:19:15] Linux kernel: heap out of bounds write in nf_dup_netdev.c since 5.4

[00:23:03] Overview of GLIBC heap exploitation techniques

The DAY[0] Podcast episodes are streamed live on Twitch (@dayzerosec) twice a week:

Mondays at 3:00pm Eastern (Boston) we focus on web and more bug bounty style vulnerabilities
Tuesdays at 7:00pm Eastern (Boston) we focus on lower-level vulnerabilities and exploits.

The Video archive can be found on our Youtube channel: https://www.youtube.com/c/dayzerosec

You can also join our discord: https://discord.gg/daTxTK9

Or follow us on Twitter (@dayzerosec) to know when new releases are coming.

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