CVE-2024-48827

published 2024-10-11

CVE-2024-48827: An issue in sbondCo Watcharr v.1.43.0 allows a remote attacker to execute arbitrary code and escalate privileges via the Change Password function.

Priority P2 62 high 8.8 CVSS 3.1

AV N AC L PR L UI N S U C H I H A H

EXPLOIT

An issue in sbondCo Watcharr v.1.43.0 allows a remote attacker to execute arbitrary code and escalate privileges via the Change Password function.

Affected

1 ranges

Vendor	Product	Version range	Fixed in
sbond	watcharr	—	—

Detection & IOCs extracted from sources · hover to see the quote

url /api/auth/↗

url /api/server/users/{user_id}↗

port 3080↗

• → Privilege escalation is performed by POSTing {"permissions": 3} to /api/server/users/{user_id} with a forged JWT Authorization header. Monitor for POST requests to /api/server/users/* with permissions value 3, 6, or 9 from non-admin sessions. ↗
• → The exploit authenticates via POST to /api/auth/ to obtain a legitimate JWT, then immediately crafts a new token with userId=1. Correlate rapid sequential calls to /api/auth/ followed by /api/server/users/* from the same source IP. ↗
• → userId=1 is hardcoded as the admin account in Watcharr. Flag any JWT payload where userId is set to 1 but the originating login session belonged to a different userId. ↗

• · Watcharr's JWT implementation does not enforce signature verification, allowing tokens to be decoded and re-encoded with an empty secret. This is the root cause enabling the privilege escalation — any deployment of Watcharr v1.43.0 and below is affected regardless of configuration. ↗
• · Partial admin privileges can also be obtained using permissions values 6 or 9, not only 3. Detection rules should cover all three values. ↗

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