[MFSA-2021-04] Security Vulnerabilities fixed in Firefox ESR 78.7
CVE-2020-26976: HTTPS pages could have been intercepted by a registered service worker when they should not have been (moderate)
When a HTTPS page was embedded in a HTTP page, and there was a service worker registered for the former, the service worker could have intercepted the request for the secure page despite the iframe not being a secure context due to the (insecure) framing.CVE-2021-23953: Cross-origin information leakage via redirected PDF requests (high)
If a user clicked into a specifically crafted PDF, the PDF reader could be confused into leaking cross-origin information, when said information is served as chunked data.CVE-2021-23954: Type confusion when using logical assignment operators in JavaScript switch statements (high)
Using the new logical assignment operators in a JavaScript switch statement could have caused a type confusion, leading to a memory corruption and a potentially exploitable crash.CVE-2021-23960: Use-after-poison for incorrectly redeclared JavaScript variables during GC (moderate)
Performing garbage collection on re-declared JavaScript variables resulted in a user-after-poison, and a potentially exploitable crash.CVE-2021-23964: Memory safety bugs fixed in Firefox 85 and Firefox ESR 78.7 (high)
Mozilla developers Alexis Beingessner, Christian Holler, Andrew McCreight, Tyson Smith, Jon Coppeard, André Bargull, Jason Kratzer, Jesse Schwartzentruber, Steve Fink, Byron Campen reported memory safety bugs present in Firefox 84 and Firefox ESR 78.6. Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of these could have been exploited to run arbitrary code.
Package | Affected Version |
---|---|
pkg:mozilla/Firefox%20ESR | < 78.7 |
Package | Fixed Version |
---|---|
pkg:mozilla/Firefox%20ESR | = 78.7 |
- ID
- MFSA-2021-04
- Severity
- high
- URL
- https://www.mozilla.org/en-US/security/advisories/mfsa2021-04
- Published
-
2021-01-26T00:00:00
(3 years ago) - Modified
-
2021-01-26T00:00:00
(3 years ago) - Other Advisories
-
- ALAS2-2021-1603
- ALPINE:CVE-2020-26976
- ALPINE:CVE-2021-23953
- ALPINE:CVE-2021-23954
- ALPINE:CVE-2021-23960
- ALPINE:CVE-2021-23964
- ASA-202012-25
- ASA-202102-1
- ASA-202102-2
- DSA-4840-1
- DSA-4842-1
- ELSA-2021-0288
- ELSA-2021-0290
- ELSA-2021-0297
- ELSA-2021-0298
- GLSA-202102-01
- GLSA-202102-02
- MFSA-2020-54
- MFSA-2021-03
- MFSA-2021-05
- openSUSE-SU-2021:0208-1
- openSUSE-SU-2021:0209-1
- openSUSE-SU-2021:0222-1
- openSUSE-SU-2021:0223-1
- RHSA-2021:0288
- RHSA-2021:0290
- RHSA-2021:0297
- RHSA-2021:0298
- SUSE-SU-2021:0241-1
- SUSE-SU-2021:0245-1
- SUSE-SU-2021:0246-1
- SUSE-SU-2021:0257-1
- SUSE-SU-2021:0259-1
- USN-4671-1
- USN-4717-1
- USN-4736-1
Source | # ID | Name | URL |
---|---|---|---|
Bugzilla | 1674343 | https://bugzilla.mozilla.org/show_bug.cgi?id=1674343 | |
Bugzilla | 1683940 | https://bugzilla.mozilla.org/show_bug.cgi?id=1683940 | |
Bugzilla | 1684020 | https://bugzilla.mozilla.org/show_bug.cgi?id=1684020 | |
Bugzilla | 1675755 | https://bugzilla.mozilla.org/show_bug.cgi?id=1675755 | |
Bugzilla | 1662507 | Memory safety bugs fixed in Firefox 85 and Firefox ESR 78.7 | https://bugzilla.mozilla.org/show_bug.cgi?id=1662507 |
Bugzilla | 1666285 | Memory safety bugs fixed in Firefox 85 and Firefox ESR 78.7 | https://bugzilla.mozilla.org/show_bug.cgi?id=1666285 |
Bugzilla | 1673526 | Memory safety bugs fixed in Firefox 85 and Firefox ESR 78.7 | https://bugzilla.mozilla.org/show_bug.cgi?id=1673526 |
Bugzilla | 1674278 | Memory safety bugs fixed in Firefox 85 and Firefox ESR 78.7 | https://bugzilla.mozilla.org/show_bug.cgi?id=1674278 |
Bugzilla | 1674835 | Memory safety bugs fixed in Firefox 85 and Firefox ESR 78.7 | https://bugzilla.mozilla.org/show_bug.cgi?id=1674835 |
Bugzilla | 1675097 | Memory safety bugs fixed in Firefox 85 and Firefox ESR 78.7 | https://bugzilla.mozilla.org/show_bug.cgi?id=1675097 |
Bugzilla | 1675844 | Memory safety bugs fixed in Firefox 85 and Firefox ESR 78.7 | https://bugzilla.mozilla.org/show_bug.cgi?id=1675844 |
Bugzilla | 1675868 | Memory safety bugs fixed in Firefox 85 and Firefox ESR 78.7 | https://bugzilla.mozilla.org/show_bug.cgi?id=1675868 |
Bugzilla | 1677590 | Memory safety bugs fixed in Firefox 85 and Firefox ESR 78.7 | https://bugzilla.mozilla.org/show_bug.cgi?id=1677590 |
Bugzilla | 1677888 | Memory safety bugs fixed in Firefox 85 and Firefox ESR 78.7 | https://bugzilla.mozilla.org/show_bug.cgi?id=1677888 |
Bugzilla | 1680410 | Memory safety bugs fixed in Firefox 85 and Firefox ESR 78.7 | https://bugzilla.mozilla.org/show_bug.cgi?id=1680410 |
Bugzilla | 1681268 | Memory safety bugs fixed in Firefox 85 and Firefox ESR 78.7 | https://bugzilla.mozilla.org/show_bug.cgi?id=1681268 |
Bugzilla | 1682068 | Memory safety bugs fixed in Firefox 85 and Firefox ESR 78.7 | https://bugzilla.mozilla.org/show_bug.cgi?id=1682068 |
Bugzilla | 1682938 | Memory safety bugs fixed in Firefox 85 and Firefox ESR 78.7 | https://bugzilla.mozilla.org/show_bug.cgi?id=1682938 |
Bugzilla | 1683736 | Memory safety bugs fixed in Firefox 85 and Firefox ESR 78.7 | https://bugzilla.mozilla.org/show_bug.cgi?id=1683736 |
Bugzilla | 1685260 | Memory safety bugs fixed in Firefox 85 and Firefox ESR 78.7 | https://bugzilla.mozilla.org/show_bug.cgi?id=1685260 |
Bugzilla | 1685925 | Memory safety bugs fixed in Firefox 85 and Firefox ESR 78.7 | https://bugzilla.mozilla.org/show_bug.cgi?id=1685925 |
Type | Package URL | Namespace | Name / Product | Version | Distribution / Platform | Arch | Patch / Fix |
---|---|---|---|---|---|---|---|
Affected | pkg:mozilla/Firefox%20ESR | Firefox ESR | < 78.7 | ||||
Fixed | pkg:mozilla/Firefox%20ESR | Firefox ESR | = 78.7 |
# CVE | Description | CVSS | EPSS | EPSS Trend (30 days) | Affected Products | Weaknesses | Security Advisories | Exploits | PoC | Pubblication Date | Modification Date |
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# CVE | Description | CVSS | EPSS | EPSS Trend (30 days) | Affected Products | Weaknesses | Security Advisories | PoC | Pubblication Date | Modification Date |