Bug 2014230 (CVE-2021-20322)
Summary: | CVE-2021-20322 kernel: new DNS Cache Poisoning Attack based on ICMP fragment needed packets replies | ||
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Product: | [Other] Security Response | Reporter: | Alex <allarkin> |
Component: | vulnerability | Assignee: | Red Hat Product Security <security-response-team> |
Status: | CLOSED ERRATA | QA Contact: | |
Severity: | medium | Docs Contact: | |
Priority: | medium | ||
Version: | unspecified | CC: | acaringi, adscvr, airlied, alciregi, bhu, brdeoliv, bskeggs, chwhite, crwood, dhoward, dvlasenk, fhrbata, fpacheco, hdegoede, hkrzesin, jarod, jarodwilson, jburrell, jeremy, jforbes, jglisse, jlelli, jonathan, josef, jshortt, jstancek, jwboyer, kcarcia, kernel-maint, kernel-mgr, lgoncalv, linville, masami256, mchehab, nmurray, pdwyer, ptalbert, qzhao, rvrbovsk, security-response-team, steved, vkumar, walters, williams, yozone |
Target Milestone: | --- | Keywords: | Security |
Target Release: | --- | ||
Hardware: | All | ||
OS: | Linux | ||
Whiteboard: | |||
Fixed In Version: | kernel 5.15-rc1 | Doc Type: | If docs needed, set a value |
Doc Text: |
A flaw in the processing of received ICMP errors (ICMP fragment needed and ICMP redirect) in the Linux kernel functionality was found to allow the ability to quickly scan open UDP ports. This flaw allows an off-path remote user to effectively bypass the source port UDP randomization. The highest threat from this vulnerability is to confidentiality and possibly integrity, because software that relies on UDP source port randomization are indirectly affected as well.
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Story Points: | --- |
Clone Of: | Environment: | ||
Last Closed: | 2022-05-31 15:13:31 UTC | Type: | --- |
Regression: | --- | Mount Type: | --- |
Documentation: | --- | CRM: | |
Verified Versions: | Category: | --- | |
oVirt Team: | --- | RHEL 7.3 requirements from Atomic Host: | |
Cloudforms Team: | --- | Target Upstream Version: | |
Embargoed: | |||
Bug Depends On: | 2015075, 2015110, 2015111, 2015112, 2066152, 2066153 | ||
Bug Blocks: | 2001443, 2014425 |
Description
Alex
2021-10-14 16:40:33 UTC
Created kernel tracking bugs for this issue: Affects: fedora-all [bug 2015075] Reproducer: No reproducer exists at this time. This was fixed for Fedora with the 5.13.17 stable kernel updates. This issue has been addressed in the following products: Red Hat Enterprise Linux 8 Via RHSA-2022:1975 https://access.redhat.com/errata/RHSA-2022:1975 This issue has been addressed in the following products: Red Hat Enterprise Linux 8 Via RHSA-2022:1988 https://access.redhat.com/errata/RHSA-2022:1988 This issue has been addressed in the following products: Red Hat Enterprise Linux 8.4 Extended Update Support Via RHSA-2022:4829 https://access.redhat.com/errata/RHSA-2022:4829 This issue has been addressed in the following products: Red Hat Enterprise Linux 8.4 Extended Update Support Via RHSA-2022:4835 https://access.redhat.com/errata/RHSA-2022:4835 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-2021-20322 |