Day[0]

Latest Episodes:

[bounty] Cloudflare Pages, Hacking a Bank, and Attacking Price Oracles May 10, 2022

Show notes

Links and vulnerability summaries for this episode are available at: https://dayzerosec.com/podcast/cloudflare-pages-hacking-a-bank-and-attacking-price-oracles.html

Some interesting vulnerabilities this week from a Cloudflare Pages container escape chain, to hacking a bank's web application with some neat tricks to get abuse a file-write in a hardened envrionment, and even another dumb smart-contract bug.

[00:00:23] Cloudflare Pages, part 1: The fellowship of the secret

[00:10:07] Ruby on Rails - Possible XSS Vulnerability in ActionView tag helpers [CVE-2022-27777]

[00:15:01] Hacking a Bank by Finding a 0day in DotCMS

[00:22:23] Aave V3’s Price Oracle Manipulation Vulnerability

[00:33:53] [Reddit] Able to bypass email verification and change email to any other user email

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] NimbusPwn, a CLFS Vulnerability, and DatAFLow (Fuzzing) May 05, 2022

Show notes

Links and vulnerability summaries for this episode are available at: https://dayzerosec.com/podcast/nimbuspwn-a-clfs-vulnerability-and-dataflow.html

A few vulnerabilities from a TOCTOU to an arbitrary free, and some research into using data-flow in your fuzzing.

[00:00:18] Spot the Vuln - Where's it At?

[00:03:44] Nimbuspwn - A Linux Elevation of Privilege

[00:08:38] Windows Common Log File System (CLFS) Logical-Error Vulnerability [CVE-2022-24521]

[00:15:32] Arbitrary Free in Accusoft ImageGear ioca_mys_rgb_allocate

[00:25:31] Commit Level Vulnerability Dataset

[00:28:44] DatAFLow - Towards a Data-Flow-Guided Fuzzer

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] XSS for NFTs, a VMWare Workspace ONE UEM SSRF, and GitLab CI Container Escape May 03, 2022

Show notes

Links and vulnerability summaries for this episode are available at: https://dayzerosec.com/podcast/xss-for-nfts-a-vmware-workspace-one-uem-ssrf-and-gitlab-ci-container-escape.html

Some straight forward bugs this week with some interesting discussion around cryptographic protocols (VMWare Workspace), XSS in the Web3 world, and whether container escapes into a low-privileged VM matter. Along with a couple just note-worthy test-cases to keep in mind while bug hunting.

[00:00:35] Wormable Cross-Site Scripting Vulnerability affecting Rarible’s NFT Marketplace

[00:09:14] Encrypting our way to SSRF in VMWare Workspace One UEM [CVE-2021-22054]

[00:14:29] How I Bypass 2FA while Resetting Password

[00:16:41] Container escape on public GitLab CI Runners

[00:30:39] [Nextcloud] Bypass the protection lock in andoid app

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

<ul>

<li>Mondays at 3:00pm Eastern (Boston) we focus on web and more bug bounty style vulnerabilities</li>

<li>Tuesdays at 7:00pm Eastern (Boston) we focus on lower-level vulnerabilities and exploits.</li>

</ul>

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] Getting into Vulnerability Research and a FUSE use-after-free Apr 28, 2022

Show notes

Links and vulnerability summaries for this episode are available at: https://dayzerosec.com/podcast/getting-into-vulnerability-research-and-a-fuse-use-after-free.html

We are joined by Cts for a discussion about getting into vulnerability research and some thoughts about the higher-level bug hunting process, then a look at some black-box fuzzing of MS Defender for IoT and a FUSE use-after-free.

[00:00:44] Spot the Vuln - What do I need?

[00:03:11] Discussion: Getting into Vulnerability Research

[00:39:43] Inside the Black Box - How We Fuzzed Microsoft Defender for IoT and Found Multiple Vulnerabilities

[00:43:25] FUSE allows UAF reads of write() buffers, allowing theft of (partial) /etc/shadow hashes

[00:46:51] FUSE allows UAF reads of write() buffers, allowing theft of (partial) /etc/shadow hashes

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] A Struts RCE, Broken Java ECDSA (Psychic Signatures) and a Bad Log4Shell Fix Apr 26, 2022

Show notes

Links and vulnerability summaries for this episode are available at: https://dayzerosec.com/podcast/a-struts-rce-broken-java-ecdsa-psychic-signatures-and-a-bad-log4shell-fix.html

An intresting mix of issues from crypto (Psychic Signatures), to a bad vulnerability patching service (patching log4shell), and bad logic leading to authentication bypassing and leaking sensitive keys.

[00:00:24] Psychic Signatures in Java [CVE-2022-21449]

[00:15:09] AWS's Log4Shell Hot Patch Vulnerable to Container Escape and Privilege Escalation

[00:18:33] Bypass Apple Corp SSO on Apple Admin Panel

[00:21:55] Exploiting Struts RCE on 2.5.26

[00:27:46] bluez: malicious USB devices can steal Bluetooth link keys over HCI using fake BD_ADDR

[00:31:20] New XSS vectors

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] Another iOS Bug and Edge Chakra Exploitation Apr 21, 2022

Show notes

Links and vulnerability summaries for this episode are available at: https://dayzerosec.com/podcast/another-ios-bug-and-edge-chakra-exploitation.html

A massive 11,000 byte overflow in WatchGuard, some discussion about lock-related vulnerabilities and analysis, and a look at a ChakraCore exploit dealing with all the mitigations (ASLR, DEP, CFG, ACG,CIG)

[00:00:32] Spot the Vuln - The Global Query

[00:05:04] Diving Deeper into WatchGuard Pre-Auth RCE [CVE-2022-26318]

[00:09:42] HTTP Protocol Stack Remote Code Execution Vulnerability [CVE-2022-21907]

[00:18:21] iOS in-the-wild vulnerability in vouchers [CVE-2021-1782]

[00:37:06] Microsoft Edge Type Confusion Vulnerability (Part 2) [CVE-2019-0567]

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] Taking Over an Internal AWS Service and an Interesting XSS Vector Apr 19, 2022

Show notes

Links and vulnerability summaries for this episode are available at: https://dayzerosec.com/podcast/taking-over-an-internal-aws-service-and-an-interesting-xss-vector.html

Short episode this week, looking at some relatively simple vulnerabilities ranging XSS, to leaking internal service credentials in AWS Relational Database Service by disabling validiation.

[00:00:40] Git security vulnerability announced

[00:06:37] AWS RDS Vulnerability Leads to AWS Internal Service Credentials

[00:14:04] Privilege Escalation to SYSTEM in AWS VPN Client [CVE-2022-25165]

[00:18:37] Copy-paste XSS in vditor text editor [CVE-2021-32855]

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 subtle iOS parsing bug and a PHP use-after-free Apr 14, 2022

Show notes

Links and vulnerability summaries for this episode are available at: https://dayzerosec.com/podcast/a-subtle-ios-parsing-bug-and-a-php-use-after-free.html

We dive into an ASN.1 parsing bug impacting iOS, and a PHP use-after-free to bypass disabled functions, ending the week with a discussion about whether or not its too late to get into this area of security.

[00:00:29] Spot the Vuln - One HMAC at a Time

[00:03:19] CVE-2021-30737, @xerub's 2021 iOS ASN.1 Vulnerability

[00:19:03] In the land of PHP you will always be (use-after-)free

[00:30:13] security things in Linux v5.10

[00:36:16] Discussion: Is It too late to get into "cyber security"

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] A Double-Edged SSRF, Pritunl VPN LPE, and a NodeBB Vuln Apr 12, 2022

Show notes

Links and vulnerability summaries for this episode are available at: https://dayzerosec.com/podcast/a-double-edged-ssrf-pritunl-vpn-lpe-and-a-nodebb-vuln.html

Quick bounty episode this week with some request smuggling, abusing a SSRF for client-sided impact, a weird oauth flow, and a desktop VPN client LPE.

[00:00:28] HTTP Request Smuggling on business.apple.com and Others.

[00:06:25] Exploiting a double-edged SSRF for server and client-side impact

[00:14:47] Local Privilege Escalation in Pritunl VPN Client [CVE-2022-25372]

[00:20:27] A NodeBB 0-day

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] FORCEDENTRY Sandbox Escape and NetFilter Bugs Apr 07, 2022

Show notes

Links and vulnerability summaries for this episode are available at: https://dayzerosec.com/podcast/forcedentry-sandbox-escape-and-netfilter-bugs.html

More information about the FORCEDENTRY exploit chain, and some Linux exploitation with a couple netfilter bugs. Ending the episode with some discussion about exploiting blind kernel read primitives from Microsoft.

[00:00:28] Spot the Vuln - Adding Entropy

[00:02:56] FORCEDENTRY: Sandbox Escape

[00:15:21] How The Tables Have Turned: An analysis of two new Linux vulnerabilities in nf_tables

[00:32:38] Exploring a New Class of Kernel Exploit Primitive

[00:40:18] BlueHat IL Videos are up

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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