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CVE-2015-8549

HIGHFix: hydralabs/pyamf#58

CVE-2015-8549 is a high-severity (CVSS 7.1) XML External Entity (XXE) vulnerability in pyamf pyamf. O3 Security detects and blocks CVE-2015-8549 exploitation at runtime via eBPF exploit-chain detection and L7 egress monitoring, even on unpatched systems.

XML external entity (XXE) vulnerability in PyAMF before 0.8.0 allows remote attackers to cause a denial of service or read arbitrary files via a crafted Action Message Format (AMF) payload.

Published
Jan 15, 2020
Updated
Jun 17, 2026
Affected
1 product
Patched
See advisory
Exploits
None indexed

Description

XML external entity (XXE) vulnerability in PyAMF before 0.8.0 allows remote attackers to cause a denial of service or read arbitrary files via a crafted Action Message Format (AMF) payload.

Affected Products

1 product · 1 configurations
Application
pyamfpyamf
< 0.8.0
range

Detection & mitigation playbook

Vendor / appliance
  1. Detect

    Inventory every pyamf pyamf deployment and check each version against the affected-products list above. Because the exploit targets the running system rather than your application code, also watch for exploitation at the network and runtime layer — O3 flags the exploit behaviour from runtime telemetry and egress traffic even before a vulnerable build is confirmed.

  2. Fix

    Apply the pyamf pyamf security patch or hotfix for CVE-2015-8549 on the affected version, following the vendor advisory for your exact build.

  3. Workarounds

    Cut exposure now: restrict the management/admin interface to trusted networks, segment the device, and apply the vendor's recommended configuration mitigations and any WAF/IPS signature. O3's runtime protection blocks the exploit chain at execution, holding the line on unpatched or end-of-life systems until you can patch.

  4. How O3 protects you

    O3 detects and blocks CVE-2015-8549 exploitation at runtime: eBPF exploit-chain detection, plus L7 egress monitoring that catches the post-exploitation callback and severs the attacker's outbound channel.

Tailored to CVE-2015-8549. Runtime protection reduces exposure until a permanent patch is applied and verified — it complements patching, it doesn't replace it.

Frequently Asked Questions

XML external entity (XXE) vulnerability in PyAMF before 0.8.0 allows remote attackers to cause a denial of service or read arbitrary files via a crafted Action Message Format (AMF) payload.
O3 Security · Runtime Protection

Is CVE-2015-8549 being exploited in your environment?

O3's eBPF runtime sensors and L7 egress monitoring detect and block the CVE-2015-8549 exploit chain at execution — protecting unpatched and end-of-life systems until the vendor patch is applied.