smack: tcp: ipv4, fix incorrect labeling

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2024-47659
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2024-10-09 14:15:07 UTC
Updated2026-08-04 11:20:36 UTC
DescriptionIn 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.

Risk And Classification

Primary CVSS: v3.1 8.8 HIGH from [email protected]

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Problem Types: NVD-CWE-noinfo

VersionSourceTypeScoreSeverityVector
3.1[email protected]Primary8.8HIGHCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
3.1416baaa9-dc9f-4396-8d5f-8c081fb06d67Secondary9.1CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
3.1CNADECLARED9.1CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Operating System Linux Linux Kernel All All All All

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected 07feee8f812f7327a46186f7604df312c8c81962 d3f56c653c65f170b172d3c23120bc64ada645d8 git Not specified
CNA Linux Linux affected 07feee8f812f7327a46186f7604df312c8c81962 5b4b304f196c070342e32a4752e1fa2e22fc0671 git Not specified
CNA Linux Linux affected 07feee8f812f7327a46186f7604df312c8c81962 a948ec993541db4ef392b555c37a1186f4d61670 git Not specified
CNA Linux Linux affected 07feee8f812f7327a46186f7604df312c8c81962 0aea09e82eafa50a373fc8a4b84c1d4734751e2c git Not specified
CNA Linux Linux affected 07feee8f812f7327a46186f7604df312c8c81962 0776bcf9cb6de46fdd94d10118de1cf9b05f83b9 git Not specified
CNA Linux Linux affected 07feee8f812f7327a46186f7604df312c8c81962 4be9fd15c3c88775bdf6fa37acabe6de85beebff git Not specified
CNA Linux Linux affected 07feee8f812f7327a46186f7604df312c8c81962 d3703fa94116fed91f64c7d1c7d284fb4369070f git Not specified
CNA Linux Linux affected 07feee8f812f7327a46186f7604df312c8c81962 2fe209d0ad2e2729f7e22b9b31a86cc3ff0db550 git Not specified
CNA Linux Linux affected 2.6.30 Not specified
CNA Linux Linux unaffected 2.6.30 semver Not specified
CNA Linux Linux unaffected 4.19.322 4.19.* semver Not specified
CNA Linux Linux unaffected 5.4.284 5.4.* semver Not specified
CNA Linux Linux unaffected 5.10.226 5.10.* semver Not specified
CNA Linux Linux unaffected 5.15.167 5.15.* semver Not specified
CNA Linux Linux unaffected 6.1.109 6.1.* semver Not specified
CNA Linux Linux unaffected 6.6.50 6.6.* semver Not specified
CNA Linux Linux unaffected 6.10.9 6.10.* semver Not specified
CNA Linux Linux unaffected 6.11 * original_commit_for_fix Not specified

References

ReferenceSourceLinkTags
git.kernel.org/stable/c/d3703fa94116fed91f64c7d1c7d284fb4369070f 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/0776bcf9cb6de46fdd94d10118de1cf9b05f83b9 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/a948ec993541db4ef392b555c37a1186f4d61670 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/4be9fd15c3c88775bdf6fa37acabe6de85beebff 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/d3f56c653c65f170b172d3c23120bc64ada645d8 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
lists.debian.org/debian-lts-announce/2025/01/msg00001.html af854a3a-2127-422b-91ae-364da2661108 lists.debian.org
git.kernel.org/stable/c/0aea09e82eafa50a373fc8a4b84c1d4734751e2c 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/2fe209d0ad2e2729f7e22b9b31a86cc3ff0db550 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/5b4b304f196c070342e32a4752e1fa2e22fc0671 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
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