CVE-2016-9563KEV · OVERDUE

SAP NetWeaver XML External Entity (XXE) Vulnerability

Medium · published November 23, 2016

Patch now

The score understates this — it's already being exploited

CVSS calls it medium at 6.5. It is confirmed in active exploitation. It sits in the 97.9th percentile for exploit probability.

1634
days past CISA
deadline
CVSS v3.1
6.5
EPSS
24%
Percentile
97.9
In the wild
Confirmed
What it is

⚠️ Watch out! Authenticated users can exploit a sneaky XML External Entity (XXE) vulnerability in SAP NetWeaver AS JAVA 7.5 through a specific URI. Don't let this one slide! 🔍 Think of this vulnerability like a restaurant that relies on a waiter (the server) to fetch ingredients (data) from the pantry (internal databases) without checking the orders. If the waiter is tricked into grabbing something they shouldn’t, it could lead to a recipe disaster! 🍽️ If exploited, attackers could read sensitive files from the server or manipulate data, leading to potential data breaches or system misconfigurations. It’s a medium risk, but given that it’s been known to be exploited, it’s best not to underestimate it! 🔥

Put simply

Think of this vulnerability like a restaurant that relies on a waiter (the server) to fetch ingredients (data) from the pantry (internal databases) without checking the orders. If the waiter is tricked into grabbing something they shouldn’t, it could lead to a recipe disaster! 🍽️ This XXE vulnerability allows remote authenticated users to send specially crafted requests to the vulnerable URI, enabling them to access internal resources that should be protected. The failure to properly sanitize XML input opens the door to this attack.

What to do

If exploited, attackers could read sensitive files from the server or manipulate data, leading to potential data breaches or system misconfigurations. It’s a medium risk, but given that it’s been known to be exploited, it’s best not to underestimate it! 🔥 Immediately apply SAP Security Note 2296909 to patch the vulnerability. It’s also wise to review your XML parsing practices to ensure external entities are safely handled. Regular security audits and updates can help prevent similar issues in the future! 🛡️ You can tackle this! Follow the patching steps and secure your environment. You've got this! 🚀

The record
Technical detail
CVSS v3.1
6.5 · MEDIUM
Vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
CVSS v4.0
Not supplied
EPSS
0.24226 · 97.9th percentile
Published
2016-11-23T02:00Z
KEV added
2021-11-03 · due 2022-05-03
EPSS history
Timeline
  • 03 NOV 00:00Z
    Added to CISA KEV — remediate by May 3
    kev
  • 23 NOV 02:00Z
    BC-BMT-BPM-DSK in SAP NetWeaver AS JAVA 7.5 allows remote authenticated users to conduct XML External Entity (XXE) attacks via the…
    cvelistv5