Bug 1913348 (CVE-2020-36158)

Summary: CVE-2020-36158 kernel: buffer overflow in mwifiex_cmd_802_11_ad_hoc_start function in drivers/net/wireless/marvell/mwifiex/join.c via a long SSID value
Product: [Other] Security Response Reporter: Guilherme de Almeida Suckevicz <gsuckevi>
Component: vulnerabilityAssignee: Red Hat Product Security <security-response-team>
Status: NEW --- QA Contact:
Severity: medium Docs Contact:
Priority: medium    
Version: unspecifiedCC: acaringi, adscvr, airlied, alciregi, bdettelb, bhu, blc, bmasney, brdeoliv, bskeggs, chwhite, dhoward, dvlasenk, fhrbata, hdegoede, hkrzesin, itamar, jarodwilson, jeremy, jforbes, jglisse, jlelli, jonathan, josef, jshortt, jstancek, jwboyer, kcarcia, kernel-maint, kernel-mgr, kmullins, lgoncalv, linville, masami256, mchehab, mlangsdo, nmurray, ptalbert, qzhao, rvrbovsk, steved, tomckay, walters, williams, yozone
Target Milestone: ---Keywords: Security
Target Release: ---   
Hardware: All   
OS: Linux   
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Doc Text:
A flaw was found in the Linux kernel. The marvell wifi driver could allow a local attacker to execute arbitrary code via a long SSID value in mwifiex_cmd_802_11_ad_hoc_start function. The highest threat from this vulnerability is to data confidentiality and integrity as well as system availability.
Story Points: ---
Clone Of: Environment:
Last Closed: Type: ---
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Verified Versions: Category: ---
oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
Bug Depends On: 1914996, 1914999, 1913349, 1914995, 1914998, 1915000    
Bug Blocks: 1913350    

Description Guilherme de Almeida Suckevicz 2021-01-06 14:56:47 UTC
mwifiex_cmd_802_11_ad_hoc_start in drivers/net/wireless/marvell/mwifiex/join.c in the Linux kernel through 5.10.4 might allow remote attackers to execute arbitrary code via a long SSID value.

Reference and upstream patch:
https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=5c455c5ab332773464d02ba17015acdca198f03d

Comment 1 Guilherme de Almeida Suckevicz 2021-01-06 14:57:41 UTC
Created kernel tracking bugs for this issue:

Affects: fedora-all [bug 1913349]

Comment 4 Alex 2021-01-11 17:44:11 UTC
Mitigation:

To mitigate this issue, prevent the module mwifiex from being loaded. Please see https://access.redhat.com/solutions/41278 for information on how to blacklist a kernel module to prevent it from loading automatically.

Comment 5 Petr Matousek 2021-01-14 12:14:15 UTC
Statement:

This issue is rated as having Moderate impact because the attacker needs to be local and privileged enough to be able to initiate ad-hoc WIFI network creation.