Mageia 2020-0377: firefox security update | LinuxSecurity.com
MGASA-2020-0377 - Updated firefox packages fix security vulnerabilities

Publication date: 30 Sep 2020
URL: https://advisories.mageia.org/MGASA-2020-0377.html
Type: security
Affected Mageia releases: 7
CVE: CVE-2020-15673,
     CVE-2020-15676,
     CVE-2020-15677,
     CVE-2020-15678

Mozilla developer Jason Kratzer reported memory safety bugs present in Firefox
ESR 78.2. 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 (CVE-2020-15673).

Firefox sometimes ran the onload handler for SVG elements that the DOM
sanitizer decided to remove, resulting in a XSS issue due to JavaScript being
executed after pasting attacker-controlled data into a contenteditable element
(CVE-2020-15676).

By exploiting an Open Redirect vulnerability on a website, an attacker could
have spoofed the site displayed in the download file dialog to show the
original site (the one suffering from the open redirect) rather than the site
the file was actually downloaded from (CVE-2020-15677).

When recursing through graphical layers while scrolling, an iterator may have
become invalid, resulting in a potential use-after-free. This occurs because
the function APZCTreeManager::ComputeClippedCompositionBounds did not follow
iterator invalidation rules (CVE-2020-15678).

The firefox package has been updated to the 78.x ESR branch, which brings
significant changes in how CA certificates and smart cards are loaded into
Firefox.

The root CA certificates are no longer statically built into the nss library.
They are loaded dynamically via p11-kit-trust, and therefore may be modified
by the system administrator. Smart card support should be automatically loaded
via p11-kit-trust as well, rather than requiring opensc to be manually loaded.
NSS also now complies with the system crypto policy, which is provided by the
crypto-policies package.  See the fedoraproject references for details.

References:
- https://bugs.mageia.org/show_bug.cgi?id=26711
- https://fedoraproject.org/wiki/Changes/CryptoPolicy
- https://fedoraproject.org/wiki/Changes/NSSLoadP11KitModules
- https://groups.google.com/g/mozilla.dev.tech.nspr/c/zrirzzoOjeg
- https://developer.mozilla.org/en-US/docs/Mozilla/Projects/NSS/NSS_3.53_release_notes
- https://developer.mozilla.org/en-US/docs/Mozilla/Projects/NSS/NSS_3.53.1_release_notes
- https://developer.mozilla.org/en-US/docs/Mozilla/Projects/NSS/NSS_3.54_release_notes
- https://developer.mozilla.org/en-US/docs/Mozilla/Projects/NSS/NSS_3.55_release_notes
- https://developer.mozilla.org/en-US/docs/Mozilla/Projects/NSS/NSS_3.56_release_notes
- https://developer.mozilla.org/en-US/docs/Mozilla/Projects/NSS/NSS_3.57_release_notes
- https://www.mozilla.org/en-US/security/advisories/mfsa2020-43/
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-15673
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-15676
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-15677
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-15678

SRPMS:
- 7/core/crypto-policies-20200813-1.mga7
- 7/core/p11-kit-0.23.21-1.mga7
- 7/core/nspr-4.29-1.mga7
- 7/core/rootcerts-20200911.00-1.mga7
- 7/core/nss-3.57.0-1.mga7
- 7/core/firefox-78.3.0-1.mga7
- 7/core/firefox-l10n-78.3.0-1.mga7

Mageia 2020-0377: firefox security update

Mozilla developer Jason Kratzer reported memory safety bugs present in Firefox ESR 78.2

Summary

Mozilla developer Jason Kratzer reported memory safety bugs present in Firefox ESR 78.2. 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 (CVE-2020-15673).
Firefox sometimes ran the onload handler for SVG elements that the DOM sanitizer decided to remove, resulting in a XSS issue due to JavaScript being executed after pasting attacker-controlled data into a contenteditable element (CVE-2020-15676).
By exploiting an Open Redirect vulnerability on a website, an attacker could have spoofed the site displayed in the download file dialog to show the original site (the one suffering from the open redirect) rather than the site the file was actually downloaded from (CVE-2020-15677).
When recursing through graphical layers while scrolling, an iterator may have become invalid, resulting in a potential use-after-free. This occurs because the function APZCTreeManager::ComputeClippedCompositionBounds did not follow iterator invalidation rules (CVE-2020-15678).
The firefox package has been updated to the 78.x ESR branch, which brings significant changes in how CA certificates and smart cards are loaded into Firefox.
The root CA certificates are no longer statically built into the nss library. They are loaded dynamically via p11-kit-trust, and therefore may be modified by the system administrator. Smart card support should be automatically loaded via p11-kit-trust as well, rather than requiring opensc to be manually loaded. NSS also now complies with the system crypto policy, which is provided by the crypto-policies package. See the fedoraproject references for details.

References

- https://bugs.mageia.org/show_bug.cgi?id=26711

- https://fedoraproject.org/wiki/Changes/CryptoPolicy

- https://fedoraproject.org/wiki/Changes/NSSLoadP11KitModules

- https://groups.google.com/g/mozilla.dev.tech.nspr/c/zrirzzoOjeg

- https://developer.mozilla.org/en-US/docs/Mozilla/Projects/NSS/NSS_3.53_release_notes

- https://developer.mozilla.org/en-US/docs/Mozilla/Projects/NSS/NSS_3.53.1_release_notes

- https://developer.mozilla.org/en-US/docs/Mozilla/Projects/NSS/NSS_3.54_release_notes

- https://developer.mozilla.org/en-US/docs/Mozilla/Projects/NSS/NSS_3.55_release_notes

- https://developer.mozilla.org/en-US/docs/Mozilla/Projects/NSS/NSS_3.56_release_notes

- https://developer.mozilla.org/en-US/docs/Mozilla/Projects/NSS/NSS_3.57_release_notes

- https://www.mozilla.org/en-US/security/advisories/mfsa2020-43/

- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-15673

- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-15676

- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-15677

- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-15678

Resolution

MGASA-2020-0377 - Updated firefox packages fix security vulnerabilities

SRPMS

- 7/core/crypto-policies-20200813-1.mga7

- 7/core/p11-kit-0.23.21-1.mga7

- 7/core/nspr-4.29-1.mga7

- 7/core/rootcerts-20200911.00-1.mga7

- 7/core/nss-3.57.0-1.mga7

- 7/core/firefox-78.3.0-1.mga7

- 7/core/firefox-l10n-78.3.0-1.mga7

Severity
Publication date: 30 Sep 2020
URL: https://advisories.mageia.org/MGASA-2020-0377.html
Type: security
CVE: CVE-2020-15673, CVE-2020-15676, CVE-2020-15677, CVE-2020-15678

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