cbcvebase.
CVE-2024-47659
published 2024-10-09

CVE-2024-47659: In the Linux kernel, the following vulnerability has been resolved: smack: tcp: ipv4, fix incorrect labeling Currently, Smack mirrors the label of incoming…

PriorityP351high8.8CVSS 3.1
AVNACLPRLUINSUCHIHAH
EPSS
0.84%
53.6th percentile
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, 1) returned packets are incorrectly labeled ('foo' instead of 'bar') 2) 'bar' can write to 'foo' without being authorized to write. 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.

Affected

26 ranges· showing 25
VendorProductVersion rangeFixed in
debianlinux< linux 6.1.112-1 (bookworm)linux 6.1.112-1 (bookworm)
debianlinux-6.1< linux 6.1.112-1 (bookworm)linux 6.1.112-1 (bookworm)
linuxlinux
linuxlinux>= 07feee8f812f7327a46186f7604df312c8c81962 < d3f56c653c65f170b172d3c23120bc64ada645d8d3f56c653c65f170b172d3c23120bc64ada645d8
linuxlinux>= 07feee8f812f7327a46186f7604df312c8c81962 < 5b4b304f196c070342e32a4752e1fa2e22fc06715b4b304f196c070342e32a4752e1fa2e22fc0671
linuxlinux>= 07feee8f812f7327a46186f7604df312c8c81962 < a948ec993541db4ef392b555c37a1186f4d61670a948ec993541db4ef392b555c37a1186f4d61670
linuxlinux>= 07feee8f812f7327a46186f7604df312c8c81962 < 0aea09e82eafa50a373fc8a4b84c1d4734751e2c0aea09e82eafa50a373fc8a4b84c1d4734751e2c
linuxlinux>= 07feee8f812f7327a46186f7604df312c8c81962 < 0776bcf9cb6de46fdd94d10118de1cf9b05f83b90776bcf9cb6de46fdd94d10118de1cf9b05f83b9
linuxlinux>= 07feee8f812f7327a46186f7604df312c8c81962 < 4be9fd15c3c88775bdf6fa37acabe6de85beebff4be9fd15c3c88775bdf6fa37acabe6de85beebff
linuxlinux>= 07feee8f812f7327a46186f7604df312c8c81962 < d3703fa94116fed91f64c7d1c7d284fb4369070fd3703fa94116fed91f64c7d1c7d284fb4369070f
linuxlinux>= 07feee8f812f7327a46186f7604df312c8c81962 < 2fe209d0ad2e2729f7e22b9b31a86cc3ff0db5502fe209d0ad2e2729f7e22b9b31a86cc3ff0db550
linuxlinux_kernel< 4.19.3224.19.322
linuxlinux_kernel>= 0 < 6.1.112-16.1.112-1
linuxlinux_kernel>= 0 < 6.10.9-16.10.9-1
linuxlinux_kernel>= 0 < 6.10.9-16.10.9-1
linuxlinux_kernel>= 0 < 5.4.0-200.2205.4.0-200.220
linuxlinux_kernel>= 0 < 5.15.0-125.1355.15.0-125.135
linuxlinux_kernel>= 0 < 6.8.0-50.516.8.0-50.51
linuxlinux_kernel>= 0 < 4.4.0-278.3124.4.0-278.312
linuxlinux_kernel>= 0 < 4.15.0-247.2594.15.0-247.259
linuxlinux_kernel>= 4.20 < 5.4.2845.4.284
linuxlinux_kernel>= 5.11 < 5.15.1675.15.167
linuxlinux_kernel>= 5.16 < 6.1.1096.1.109
linuxlinux_kernel>= 5.5 < 5.10.2265.10.226
linuxlinux_kernel>= 6.2 < 6.6.506.6.50

CVSS provenance

nvdv3.18.8HIGHCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
osv8.8HIGH
vendor_debian8.8HIGH
vendor_redhat8.8HIGH
vendor_ubuntu8.8HIGH
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