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Mageia: 2020-0461 Critical: Firefox Memory Safety Issues

mageia
Calendar Grey December 17, 2020
Dist Mageia Esm H88
MGASA-2020-0461 - Updated firefox packages fix security vulnerabilities Publication date: 17 Dec 202
When a BigInt was right-shifted the backing store was not properly cleared, allowing uninitialized memory to be read (CVE-2020-16042)

Summary

When a BigInt was right-shifted the backing store was not properly cleared, allowing uninitialized memory to be read (CVE-2020-16042).
Certain blit values provided by the user were not properly constrained leading to a heap buffer overflow in WebGL on some video drivers (CVE-2020-26971).
Certain input to the CSS Sanitizer confused it, resulting in incorrect components being removed. This could have been used as a sanitizer bypass (CVE-2020-26973).
When flex-basis was used on a table wrapper, a StyleGenericFlexBasis object could have been incorrectly cast to the wrong type. This resulted in a heap user-after-free, memory corruption, and a potentially exploitable crash (CVE-2020-26974).
Using techniques that built on the slipstream research, a malicious webpage could have exposed both an internal network's hosts as well as services running on the user's local machine (CVE-2020-26978).
...

Read the Full Advisory

References

- https://bugs.mageia.org/show_bug.cgi?id=27825

- - https://www.mozilla.org/en-US/security/advisories/mfsa2020-55/

- https://access.redhat.com/errata/RHSA-2020:5562

- https://www.cve.org/CVERecord?id=CVE-2020-16042

- https://www.cve.org/CVERecord?id=CVE-2020-26971

- https://www.cve.org/CVERecord?id=CVE-2020-26973

- https://www.cve.org/CVERecord?id=CVE-2020-26974

- https://www.cve.org/CVERecord?id=CVE-2020-26978

- https://www.cve.org/CVERecord?id=CVE-2020-35111

- https://www.cve.org/CVERecord?id=CVE-2020-35113

Topics%20covered

Topics Covered

security advisory critical critical update heap overflow firefox Firefox memory safety network exposure memory issues Mageia mageia

Resolution

SRPMS

- 7/core/nss-3.60.0-1.mga7

- 7/core/firefox-78.6.0-1.mga7

- 7/core/firefox-l10n-78.6.0-1.mga7

Severity
critical
Lowest
Low
Medium
High
Critical

Publication date: 17 Dec 2020
URL: https://advisories.mageia.org/MGASA-2020-0461.html
Type: security
CVE: CVE-2020-16042, CVE-2020-26971, CVE-2020-26973, CVE-2020-26974, CVE-2020-26978, CVE-2020-35111, CVE-2020-35113

Topics%20covered

Topics Covered

security advisory critical critical update heap overflow firefox Firefox memory safety network exposure memory issues Mageia mageia

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