Bug 2003224 (CVE-2020-0430) - CVE-2020-0430 kernel: possible out-of-bounds read in skb_headlen of /include/linux/skbuff.h
Summary: CVE-2020-0430 kernel: possible out-of-bounds read in skb_headlen of /include/...
Keywords:
Status: CLOSED NOTABUG
Alias: CVE-2020-0430
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Red Hat Product Security
QA Contact:
URL:
Whiteboard:
Depends On: 2003225
Blocks: Embargoed2003226
TreeView+ depends on / blocked
 
Reported: 2021-09-10 16:55 UTC by Guilherme de Almeida Suckevicz
Modified: 2021-09-21 19:17 UTC (History)
43 users (show)

Fixed In Version: kernel 4.18-rc1
Doc Type: If docs needed, set a value
Doc Text:
An out of bounds memory read flaw was found in the Linux kernel’s implementation of the eBPF code verifier. A user passing corrupted data to a helper function could access data inside the adjust_ptr_min_max_vals() function. By default, the eBPF verifier is only accessible to users with CAP_SYS_ADMIN privileges. The lack of proper validation of user-supplied eBPF programs prior to execution is the cause of this issue which could lead to a local user's ability to crash the system or possibly escalate their privileges on the system.
Clone Of:
Environment:
Last Closed: 2021-09-20 18:21:11 UTC

Attachments (Terms of Use)

Description Guilherme de Almeida Suckevicz 2021-09-10 16:55:08 UTC 
In skb_headlen of /include/linux/skbuff.h, there is a possible out of bounds read due to memory corruption. This could lead to local escalation of privilege with no additional execution privileges needed. User interaction is not needed for exploitation.Product: AndroidVersions: Android kernelAndroid ID: A-153881554

Reference:
https://source.android.com/security/bulletin/pixel/2020-09-01
Comment 1 Guilherme de Almeida Suckevicz 2021-09-10 16:55:44 UTC 
Created kernel tracking bugs for this issue:

Affects: fedora-all [bug 2003225]
Comment 2 Justin M. Forbes 2021-09-14 15:13:10 UTC 
This was fixed with 4.17 kernels for Fedora quite some time ago.
Comment 4 Product Security DevOps Team 2021-09-20 18:21:11 UTC 
This bug is now closed. Further updates for individual products will be reflected on the CVE page(s):

https://access.redhat.com/security/cve/cve-2020-0430
Note You need to log in before you can comment on or make changes to this bug.