CVE-2021-38507
Description
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. This vulnerability affects Firefox < 94, Thunderbird < 91.3, and Firefox ESR < 91.3.
Risk Information
Base Score
6.5
MODERATE
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N
EPSS Score
Exploitation Probability
0.459
Associated Vulnerability
| Vulnerability | OS Platform |
|---|---|
| Multiple vulnerabilities fixed in Mozilla Firefox ESR (91) (x64) (91.3.0) | Windows |
| Multiple vulnerabilities fixed in Mozilla Firefox ESR (91) (91.3.0) | Windows |
| Multiple vulnerabilities fixed in Mozilla Firefox (94.0) | Windows |
| Multiple vulnerabilities fixed in Mozilla Firefox (x64) (94.0) | Windows |
| Multiple vulnerabilities fixed in Mozilla Thunderbird (91) (x64) (91.3.0) | Windows |
| Multiple vulnerabilities fixed in Mozilla Thunderbird (91) (91.3.0) | Windows |
| Multiple vulnerabilities are fixed in Mozilla Firefox For Mac (94.0.1) | Mac |
| Multiple vulnerabilities are fixed in Mozilla Firefox For Mac (94.0.2) | Mac |
| Multiple vulnerabilities are fixed in Mozilla Thunderbird For Mac 91.3 | Mac |
| Multiple Vulnerabilities are affected in Firefox ESR for Mac 91.2 | Mac |
| Multiple Vulnerabilities are affected in Mozilla Firefox for Mac 91.2 | Mac |
| Multiple Vulnerabilities are affected in Mozilla Firefox for Mac 93.0 | Mac |
| Multiple Vulnerabilities are affected in Mozilla Thunderbird for Mac 91.2 | Mac |
| Multiple vulnerabilities are fixed in Mozilla Firefox For Mac 91.3 | Mac |
| Mozilla Open Source web browser (USN-5131-1) firefox_94.0+build3-0ubuntu0.18.04.1_i386.deb | Linux |
| Mozilla Open Source web browser (USN-5131-1) firefox_94.0+build3-0ubuntu0.18.04.1_amd64.deb | Linux |
| Mozilla Open Source web browser (USN-5131-1) firefox_94.0+build3-0ubuntu0.20.04.1_amd64.deb | Linux |
| Mozilla Open Source web browser (USN-5131-1) firefox_94.0+build3-0ubuntu0.21.04.1_amd64.deb | Linux |
| Mozilla Open Source web browser (USN-5131-1) firefox_94.0+build3-0ubuntu0.21.10.1_amd64.deb | Linux |
| (RHSA-2021:4116) firefox security update firefox-91.3.0-1.el7_9.i686.rpm | Linux |
| (RHSA-2021:4116) firefox security update firefox-91.3.0-1.el7_9.x86_64.rpm | Linux |
| (RHSA-2021:4123) firefox security update firefox-91.3.0-1.el8_4.x86_64.rpm | Linux |
| (RHSA-2021:4123) firefox security update firefox-debugsource-91.3.0-1.el8_4.x86_64.rpm | Linux |
| (RHSA-2021:4134) thunderbird security update thunderbird-91.3.0-2.el7_9.x86_64.rpm | Linux |
| Firefox update (ELSA-2021-4116) firefox-91.3.0-1.0.1.el7_9.i686.rpm | Linux |
| Firefox update (ELSA-2021-4116) firefox-91.3.0-1.0.1.el7_9.x86_64.rpm | Linux |
| Firefox update (ELSA-2021-4123) firefox-91.3.0-1.0.1.el8_4.x86_64.rpm | Linux |
| SUSE-SU-2021:3721-1(SUSE Linux Enterprise Server 12-SP5 ) MozillaFirefox-91.3.0-112.80.2.x86_64.rpm | Linux |
| SUSE-SU-2021:3721-1(SUSE Linux Enterprise Server 12-SP5 ) MozillaFirefox-debuginfo-91.3.0-112.80.2.x86_64.rpm | Linux |
| SUSE-SU-2021:3721-1(SUSE Linux Enterprise Server 12-SP5 ) MozillaFirefox-debugsource-91.3.0-112.80.2.x86_64.rpm | Linux |
| SUSE-SU-2021:3721-1(SUSE Linux Enterprise Server 12-SP5 ) MozillaFirefox-devel-91.3.0-112.80.2.x86_64.rpm | Linux |
| SUSE-SU-2021:3721-1(SUSE Linux Enterprise Server 12-SP5 ) MozillaFirefox-translations-common-91.3.0-112.80.2.x86_64.rpm | Linux |
| Mozilla Open Source mail and newsgroup client (USN-5152-1) thunderbird_91.3.1+build1-0ubuntu0.21.10.1_amd64.deb | Linux |
| firefox-esr security update(DSA-5026-1) firefox-esr_91.4.1esr-1~deb11u1_amd64.deb | Linux |
| thunderbird security update(DSA-5034-1) thunderbird_91.4.1-1~deb10u1_i386.deb | Linux |
| thunderbird security update(DSA-5034-1) thunderbird_91.4.1-1~deb10u1_amd64.deb | Linux |
| thunderbird security update(DSA-5034-1) thunderbird_91.4.1-1~deb11u1_amd64.deb | Linux |
| Mozilla Open Source mail and newsgroup client (USN-5248-1) thunderbird_91.5.0+build1-0ubuntu0.18.04.1_i386.deb | Linux |
| Mozilla Open Source mail and newsgroup client (USN-5248-1) thunderbird_91.5.0+build1-0ubuntu0.18.04.1_amd64.deb | Linux |
| Mozilla Open Source mail and newsgroup client (USN-5248-1) thunderbird_91.5.0+build1-0ubuntu0.20.04.1_amd64.deb | Linux |
Patch Details
Click to see the patches provided by ManageEngine for this CVE
| Patch ID | Patch Description |
|---|---|
| PATCH-322237 | Mozilla Firefox (94.0) |
| PATCH-322238 | Mozilla Firefox (x64) (94.0) |
| PATCH-322245 | Mozilla Thunderbird (91) (x64) (91.3.0) |
| PATCH-322244 | Mozilla Thunderbird (91) (91.3.0) |
| PATCH-607000 | Mozilla Firefox For Mac (124.0) |
| PATCH-607000 | Mozilla Firefox For Mac (124.0) |
| PATCH-611807 | Mozilla Thunderbird For Mac (142.0) |
| PATCH-611808 | Mozilla Firefox ESR for MAC 128.14.0 |
| PATCH-611870 | Mozilla Firefox For Mac (142.0.1) |
| PATCH-611870 | Mozilla Firefox For Mac (142.0.1) |
| PATCH-611807 | Mozilla Thunderbird For Mac (142.0) |
| PATCH-612783 | Mozilla Firefox For Mac (145.0.1) |
References
https://nvd.nist.gov/vuln/detail/CVE-2023-1234
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2023-1234