The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applicationsUpgrade Debian:11
linux-6.1
to version 6.1.119-1~deb11u1 or higher.
Note: Versions mentioned in the description apply only to the upstream linux-6.1
package and not the linux-6.1
package as distributed by Debian
.
See How to fix?
for Debian:11
relevant fixed versions and status.
In the Linux kernel, the following vulnerability has been resolved:
smack: tcp: ipv4, fix incorrect labeling
Currently, Smack mirrors the label of incoming tcp/ipv4 connections: when a label 'foo' connects to a label 'bar' with tcp/ipv4, 'foo' always gets 'foo' in returned ipv4 packets. So,
Here is a scenario how to see this:
Take two machines, let's call them C and S, with active Smack in the default state (no settings, no rules, no labeled hosts, only builtin labels)
At S, add Smack rule 'foo bar w' (labels 'foo' and 'bar' are instantiated at S at this moment)
At S, at label 'bar', launch a program that listens for incoming tcp/ipv4 connections
From C, at label 'foo', connect to the listener at S. (label 'foo' is instantiated at C at this moment) Connection succeedes and works.
Send some data in both directions.
Collect network traffic of this connection.
All packets in both directions are labeled with the CIPSO of the label 'foo'. Hence, label 'bar' writes to 'foo' without being authorized, and even without ever being known at C.
If anybody cares: exactly the same happens with DCCP.
This behavior 1st manifested in release 2.6.29.4 (see Fixes below) and it looks unintentional. At least, no explanation was provided.
I changed returned packes label into the 'bar', to bring it into line with the Smack documentation claims.