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CVE-2023-1829

Status Candidate

Overview

A use-after-free vulnerability in the Linux Kernel traffic control index filter (tcindex) can be exploited to achieve local privilege escalation. The tcindex_delete function which does not properly deactivate filters in case of a perfect hashes while deleting the underlying structure which can later lead to double freeing the structure. A local attacker user can use this vulnerability to elevate its privileges to root. We recommend upgrading past commit 8c710f75256bb3cf05ac7b1672c82b92c43f3d28.

Related Files

Ubuntu Security Notice USN-6043-1
Posted Apr 27, 2023
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 6043-1 - It was discovered that the Traffic-Control Index implementation in the Linux kernel did not properly perform filter deactivation in some situations. A local attacker could possibly use this to gain elevated privileges. Please note that with the fix for thisCVE, kernel support for the TCINDEX classifier has been removed. It was discovered that the OverlayFS implementation in the Linux kernel did not properly handle copy up operation in some conditions. A local attacker could possibly use this to gain elevated privileges.

tags | advisory, kernel, local
systems | linux, ubuntu
advisories | CVE-2023-0386, CVE-2023-1829
SHA-256 | ec0a1a5229c94426fcf24b22b769c5c1af54a44019b5d5ea9430e2216b19db8f
Ubuntu Security Notice USN-6033-1
Posted Apr 20, 2023
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 6033-1 - It was discovered that the Traffic-Control Index implementation in the Linux kernel did not properly perform filter deactivation in some situations. A local attacker could possibly use this to gain elevated privileges. Please note that with the fix for thisCVE, kernel support for the TCINDEX classifier has been removed. William Zhao discovered that the Traffic Control subsystem in the Linux kernel did not properly handle network packet retransmission in certain situations. A local attacker could use this to cause a denial of service.

tags | advisory, denial of service, kernel, local
systems | linux, ubuntu
advisories | CVE-2022-4269, CVE-2023-1032, CVE-2023-1076, CVE-2023-1077, CVE-2023-1079, CVE-2023-1118, CVE-2023-1583, CVE-2023-1670, CVE-2023-1829, CVE-2023-1855, CVE-2023-1989, CVE-2023-1990, CVE-2023-1998, CVE-2023-25012
SHA-256 | 5a30980fd0cd1ca4d29c020630f7aeac282e7c27dca316f9119d20f043479ba7
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