CVE-2024-50142

Published Nov 7, 2024

Last updated 9 days ago

Overview

Description
In the Linux kernel, the following vulnerability has been resolved: xfrm: validate new SA's prefixlen using SA family when sel.family is unset This expands the validation introduced in commit 07bf7908950a ("xfrm: Validate address prefix lengths in the xfrm selector.") syzbot created an SA with usersa.sel.family = AF_UNSPEC usersa.sel.prefixlen_s = 128 usersa.family = AF_INET Because of the AF_UNSPEC selector, verify_newsa_info doesn't put limits on prefixlen_{s,d}. But then copy_from_user_state sets x->sel.family to usersa.family (AF_INET). Do the same conversion in verify_newsa_info before validating prefixlen_{s,d}, since that's how prefixlen is going to be used later on.
Source
416baaa9-dc9f-4396-8d5f-8c081fb06d67
NVD status
Awaiting Analysis

Social media

Hype score
Not currently trending

  1. CVE-2024-50142 Critical Prefix Length Validation Fix in Linux Kernel's xfrm Module In the Linux kernel, a vulnerability has been fixed. The issue involves the xfrm system. It now checks the prefix length of new S... https://t.co/LVeENa6zIN

    @VulmonFeeds

    7 Nov 2024

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  2. CVE-2024-50142 In the Linux kernel, the following vulnerability has been resolved: xfrm: validate new SA's prefixlen using SA family when https://t.co/66prtvUrKU is unset This expands the vali… https://t.co/MHwXAbOU7O

    @CVEnew

    7 Nov 2024

    439 Impressions

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References