The Ten-Stage Bugcrowd Cycle of Despair

the-ten-stage-bugcrowd-cycle-of-despair.md · 2026-01-25

A Bug Bounty Researcher’s Field Guide to Bureaucratic Futility

Prologue: The Pitch

Bug bounty programs sell you a dream.

“Help us find vulnerabilities! Get paid for your expertise! Join our elite community of security researchers!”

The brochure shows a hacker in a hoodie, bathed in green terminal glow, collecting five-figure bounties while sipping artisanal cold brew. What they don’t show you is the six weeks of triager tennis that follows every submission, the cookie-cutter rejections, and the slow realization that the system isn’t broken… It’s working exactly as designed.

Just not designed for actual security.

Act I: The Pattern

Every bug bounty researcher knows the rhythm. It’s burned into our souls like muscle memory, like the five stages of grief, except there are ten stages and they repeat forever.

Day 1:   Submit comprehensive research with irrefutable evidence of a serious bug
Day 7:   "Please provide URL and HTTP request"
Day 8:   Explain it's not a web vulnerability
Day 14:  "We were unable to reproduce using Burp Suite"
Day 15:  Explain what Linux is
Day 21:  "Please provide video PoC"
Day 22:  Provide video showing terminal, logs, exploit, enterprise security software imploding
Day 28:  "We could not verify impact. Closing as Informative."
Day 29:  Appeal with blood pressure at 180/120
Day 35:  "After further review, Not Applicable."

Somewhere in a Slack channel, a triager with six weeks of experience posts “resolved another linux thing, idk what sockets are lol” and receives a thumbs-up emoji from a manager who evaluates performance by tickets-closed-per-hour. Peak Reddit mod energy.

Meanwhile, the vulnerability ships to fifty thousand enterprise customers. Oops, lol. But hey, they have a Bugcrowd program. Mmmm, sweet, sweet PR.

Act II: The Specimens

I want to show you real submissions. Not hypotheticals. Not “a friend of mine” anecdotes. Actual findings I submitted to Bugcrowd programs, with actual triager responses.

The vendor names are withheld, for now. Not to protect the guilty, but because I’d rather not get sued while I’m still researching their own bugs and security gaps. Bugcrowd, however, can be named. They’re the common thread. The platform. The experience.

Specimen A: The Symlink That Followed

The Vendor: An enterprise network monitoring agent running on Linux.

The Bug: The agent opens its log file without the O_NOFOLLOW flag—Security 101 for privileged services. A local attacker can replace the log with a symlink to /etc/ld.so.preload, and the next time the root-owned agent writes a log entry, it’s actually writing attacker-controlled paths into the dynamic linker’s configuration.

Every process on the system is now compromised.

The Evidence:

$ sudo strace -f -e openat the-agent 2>&1 | grep agent.log
openat(AT_FDCWD, "/var/log/agent.log", O_WRONLY|O_CREAT|O_APPEND|O_CLOEXEC, 0666) = 3

Notice what’s missing? O_NOFOLLOW. The service follows symlinks when writing as root. This is CWE-59, textbook privilege escalation. The PoC uses sudo to simulate attack conditions (log rotation, fresh install, etc.); the vulnerability is what happens after. The root service follows the symlink blindly:

sudo systemctl stop the-agent
sudo rm -f /var/log/agent.log
sudo ln -s /tmp/pwned.txt /var/log/agent.log
sudo systemctl start the-agent
cat /tmp/pwned.txt
# Congratulations, you've just written to an arbitrary file as root

The Triager Response (seven days later):

> “Your steps are unclear. Could you please consolidate all the steps in your next comment? Please use the following format: > > Target URL: > HTTP Method: > Request Headers: > Attacker Account: > Victim Account:”

This is a Linux privilege escalation. There are no URLs. There are no HTTP requests. There are no user accounts. There are terminal commands.

I rewrote the entire submission as if explaining to a golden retriever:

Step 1: Open a terminal.
Step 2: Stop the agent: sudo systemctl stop the-agent
Step 3: Delete the log: sudo rm -f /var/log/agent.log
Step 4: Create symlink: sudo ln -s /tmp/pwned.txt /var/log/agent.log
Step 5: Start the agent: sudo systemctl start the-agent
Step 6: Check: cat /tmp/pwned.txt

Six steps. Copy-paste ready. Impossible to mess up unless you’re actively trying.

I added, in bold:

> “This is a Linux command-line vulnerability, not a web application. There are no URLs or HTTP requests.”

Current status: Waiting for the golden retriever’s tail to stop wagging.

Specimen B: “Reverse engineer the binary?” lol TLDR

The Vendor: An enterprise VPN client for Linux.

The Bug: Command injection in the route manipulation function. User-controlled input flows through snprintf() into system() without sanitization, executing as root. Textbook CWE-78.

But here’s the thing, I couldn’t just tell them that. I had to prove it. Full proof-of-concept required paywalled enterprise software: licenses that start at several thousand dollars, explicitly excluded from evaluation trials.

So I did what any reasonable person would do: I reverse-engineered the entire binary and its undocumented protocol schema from scratch, purely out of spite.

The Research:

This analysis was conducted without:

Source code
Internal documentation
Official developer resources
Commercial licenses
Technical support

Everything was derived through binary reverse engineering alone.

I started with a 1.6MB stripped ELF binary and Ghidra. It only took me two days.

What I Reverse-Engineered From Scratch:

The entire IPC mechanism between the CLI and service. The D-Bus interface for inter-process communication. The XML configuration parser. The VPN connection state machine. The network configuration routines. The split tunnel implementation. The route table manipulation functions.

Then I discovered the client uses an entirely undocumented XML profile format. So I mapped that too:

vpn_profile/
├── hash_config_profile     (required, arbitrary string)
├── version                 (required, "1.0")
├── num_controllers         (required, integer)
├── controllers/
│   └── controller/
│       ├── address         (required, IP address)
│       ├── internal_ip     (required, IP address)
│       └── description     (required, string)
├── ike/
│   ├── authentication      (required, e.g., "eap-mschapv2")
│   ├── ike_version         (required, 1 or 2)
│   ├── ike_dpd_interval    (required, integer)
│   ├── encryption          (required, e.g., "AES256")
│   └── ... 8 more required fields
├── ipsec/
│   └── ... 5 required fields with nested structures
├── login/
│   └── ... 2 required fields
├── auth_profiles/
│   └── ... nested structure
└── split_tunnels/
    └── ... the fields that actually matter for the injection

Every single element. Required ordering. Type constraints. Failure modes. All reverse-engineered from binary analysis of a stripped executable.

The Bugs I Found Along the Way:

To even reach the vulnerable code path, I had to identify and patch around twenty bugs in the binary:

Category	Count	Examples
NULL Pointer Dereferences	6	Auth profile list access, controller lookup
Malloc/Free Mismatches	2	16 bytes allocated, 40+ bytes written (heap overflow)
Missing Validation	8	Empty list checks, parameter bounds
Logic Errors	4	State machine transitions, return value handling
Crash Conditions	3+	Unhandled edge cases in parser

That’s right—I found a heap overflow (CWE-122) just trying to get the client stable enough to test my actual finding.

The Patch Table:

To demonstrate the vulnerability, I had to binary-patch the executable in twenty-four places:

#   Offset    Purpose                              Category
1   0x92734   Fix malloc(16)→malloc(40) overflow   Bug Fix
2   0x96784   Skip FIPS MD5 validation             Bypass
3   0x967de   Skip FIPS MD5 validation             Bypass
4   0x9684e   Skip IKE version check               Bypass
...
20  0x35c96   Fix controller lookup crash          Bug Fix
23  0x20601   Redirect to vulnerable function      Exploit
24  0x20557   Bypass inet_aton sanitization        Exploit

Seven of those patches fix actual bugs in shipping code. The rest bypass validation that prevents reaching the vulnerable function.

The Infrastructure:

I set up a rogue StrongSwan IKEv2 server on an Ubuntu VM to serve as the VPN endpoint. I wrote custom Python tooling for binary patching. I used GDB with custom scripts to trace execution flow. I mapped every function call from profile parsing to route manipulation.

The Proof:

$ id
uid=1000(lucid) gid=1000(lucid) groups=1000(lucid)...

$ ls -la /tmp/RCE_PROOF
ls: cannot access '/tmp/RCE_PROOF': No such file or directory

$ vpn-client connect -u test -p test
VPN connected(IPSEC).

$ ls -la /tmp/RCE_PROOF
-rw-r--r--. 1 root root 0 Jan 21 21:36 /tmp/RCE_PROOF

An unprivileged user executed a command that created a root-owned file. No sudo required for the exploit itself. As a bonus, I now had a weaponized VPN app more stable than the original client. Fun!

The Submission:

I wrote a comprehensive security report documenting:

Complete static analysis methodology
Vulnerable code pattern with disassembly
Data flow from XML input to system() call
Heap overflow bonus finding
All twenty bugs discovered during analysis
All twenty-four patches required for PoC
Attack scenarios (compromised controller, supply chain, MITM)
Remediation recommendations with code samples
CVSS 9.0 (Critical) justification

I even included a pitch at the end:

> “If the vendor’s security team is looking for someone who can perform this level of analysis for the organization rather than on it, I would welcome a conversation.”

The Triager Response:

> “Thank you for your patience. If this does require sudo to trigger exploitation the customer team confirmed it isn’t considered an issue (sudo ./rce_poc.sh).”

They saw sudo in my proof-of-concept command and decided the whole thing was invalid.

The sudo was for running GDB. You need root to attach a debugger to a root-owned process. The exploit itself runs as an unprivileged user. I explained this. In the report. That they clearly didn’t read.

The Follow-Up:

> “Are you able to provide us with a set of detailed reproduction steps that trigger the RCE as root without the attacker needing any privileged/sudo access on the system?”

To which I replied:

> “To provide the PoC you’ve requested, I need subscription licenses for the management console and gateway licenses for a VPN endpoint. Without these, the client cannot complete a connection.”

The vendor’s bug bounty requires me to purchase enterprise licenses to prove a vulnerability to the vendor who sells those licenses. Licenses that start at several thousand dollars and are explicitly excluded from evaluation trials.

Current status: The vendor offered to “track down a method” to get me the licenses. We’re negotiating access to their product so I can prove their product is vulnerable. The vulnerability sits in the meantime. You know, everywhere.

The Takeaway:

I reverse-engineered an entire proprietary protocol stack from scratch. I found a heap overflow and twenty other bugs. I patched a binary in twenty-four places. I set up rogue VPN infrastructure. I wrote a report that could pass as a graduate thesis.

The response was: “But you used sudo.”

Act III: The Business Model

The incentive structure explains everything.

Bugcrowd and its competitors make money from programs, not researchers. Their customers are companies who want to check a compliance box, get an insurance discount, or write a press release about their “commitment to security.”

The incentives:

Triagers are paid to close tickets, not validate findings
Speed metrics reward quick rejections over careful analysis
“Informative” and “Not Applicable” closures cost the platform nothing
Researchers have no recourse except public shaming (which burns bridges, read: this post, oops)
Companies pay for the appearance of security engagement

The result:

Your carefully researched symlink attack, the one that took forty hours of strace analysis, kernel debugging, and evidence documentation, looks identical to the fifty garbage submissions the triager rejected that morning.

Until someone actually reads it.

And they won’t, because reading takes time, and time costs money, and the metrics say close the ticket.

Act IV: The Coping Mechanisms

You adapt. You learn the game. You develop strategies.

Pre-emptive FAQ sections. Address every possible triager objection before they can voice it:

> “This is a Linux command-line vulnerability, not a web application. There are no URLs or HTTP requests.”

> “The sudo in the proof-of-concept is for GDB attachment, not the exploit itself.”

> “Yes, local access is required. That’s what ‘Local Privilege Escalation’ means.”

Copy-paste reproduction steps. Six commands or fewer. No ambiguity. Treat it like you’re writing instructions for someone who has never seen a terminal but is about to evaluate your life’s work.

Visual evidence. Screenshots of everything. Logs with highlights. Attack flow diagrams with boxes and arrows. Make it impossible to claim “we couldn’t reproduce” when the reproduction is literally a picture.

CVE precedents. Show them that this exact vulnerability class has been accepted before. “AVGater (2017) got CVEs across a dozen antivirus vendors. Here’s the CWE number. Here’s the OWASP page.”

AI-simulated hostile review. Before submitting, ask your favourite LLM to roleplay as an incompetent triager and find reasons to reject my report. If they can find a weak point, no matter how irrelevant and insanely off-topic, a real triager definitely will.

None of this guarantees acceptance. But it makes the eventual rejection feel slightly less like a personal insult and more like an inevitable feature of a broken system.

Epilogue: The System Is Working

The bug bounty industry has a quality control problem it doesn’t want to solve.

Solving it would cost money. It would require hiring triagers with actual security expertise, paying them enough to care, giving them time to read submissions properly, and evaluating them on accuracy rather than throughput.

That’s not the business model.

The business model is selling security theater to enterprises: A managed process, a checkbox, a press release. Whether bugs actually get fixed is secondary. Whether researchers get paid fairly is tertiary. Whether the ecosystem incentivizes good-faith participation is not even on the list.

The system is working as designed.

Just not designed for you.

To be continued when the cookie-cutter responses arrive…

Lucid Duck reverse-engineers things that weren’t meant to be reverse-engineered and writes about the experience at justthetip.ca. He is currently waiting on Bugcrowd submissions and negotiating access to enterprise software so he can prove it’s broken.