Bug 2019625 (CVE-2021-38507)
| Summary: | CVE-2021-38507 Mozilla: Opportunistic Encryption in HTTP2 could be used to bypass the Same-Origin-Policy on services hosted on other ports | ||
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| Product: | [Other] Security Response | Reporter: | Doran Moppert <dmoppert> |
| Component: | vulnerability | Assignee: | Red Hat Product Security <security-response-team> |
| Status: | CLOSED ERRATA | QA Contact: | |
| Severity: | high | Docs Contact: | |
| Priority: | high | ||
| Version: | unspecified | CC: | erack, jhorak, nobody, stransky, tpopela |
| Target Milestone: | --- | Keywords: | Security |
| Target Release: | --- | ||
| Hardware: | All | ||
| OS: | Linux | ||
| Whiteboard: | |||
| Fixed In Version: | firefox 91.3, thunderbird 91.3 | Doc Type: | If docs needed, set a value |
| Doc Text: |
The Mozilla Foundation Security Advisory describes this flaw as:
The Opportunistic Encryption feature of HTTP2 (RFC 8164) allows a connection to be transparently upgraded to TLS while retaining the visual properties of an HTTP connection, including being same-origin with unencrypted connections on port 80. However, if a second encrypted port on the same IP address (e.g. Port 8443) did not opt-in to opportunistic encryption; a network attacker could forward a connection from the browser to port 443 to port 8443, causing the browser to treat the content of port 8443 as same-origin with HTTP. This was resolved by disabling the Opportunistic Encryption feature, which had low usage.
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Story Points: | --- |
| Clone Of: | Environment: | ||
| Last Closed: | 2021-11-03 20:07:59 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: | 2019237, 2019238, 2019239, 2019240, 2019241, 2019242, 2019243, 2019244, 2019245, 2019246, 2019247, 2019248, 2019249, 2019250, 2019251, 2019254, 2019255, 2019256, 2019257, 2019258, 2019259, 2019260, 2019362, 2019363 | ||
| Bug Blocks: | 2019235 | ||
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Description
Doran Moppert
2021-11-03 00:42:09 UTC
This issue has been addressed in the following products: Red Hat Enterprise Linux 7 Via RHSA-2021:4116 https://access.redhat.com/errata/RHSA-2021:4116 This issue has been addressed in the following products: Red Hat Enterprise Linux 8 Via RHSA-2021:4123 https://access.redhat.com/errata/RHSA-2021:4123 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-2021-38507 This issue has been addressed in the following products: Red Hat Enterprise Linux 8.1 Extended Update Support Via RHSA-2021:4133 https://access.redhat.com/errata/RHSA-2021:4133 This issue has been addressed in the following products: Red Hat Enterprise Linux 8.2 Extended Update Support Via RHSA-2021:4132 https://access.redhat.com/errata/RHSA-2021:4132 This issue has been addressed in the following products: Red Hat Enterprise Linux 8 Via RHSA-2021:4130 https://access.redhat.com/errata/RHSA-2021:4130 This issue has been addressed in the following products: Red Hat Enterprise Linux 7 Via RHSA-2021:4134 https://access.redhat.com/errata/RHSA-2021:4134 This issue has been addressed in the following products: Red Hat Enterprise Linux 8.1 Extended Update Support Via RHSA-2021:4607 https://access.redhat.com/errata/RHSA-2021:4607 This issue has been addressed in the following products: Red Hat Enterprise Linux 8.2 Extended Update Support Via RHSA-2021:4605 https://access.redhat.com/errata/RHSA-2021:4605 |