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Mageia 7: 2020-0462 Moderate: Multiple Thunderbird Fixes Explored

mageia
Calendar Grey December 17, 2020
Dist Mageia Esm H88
Recent updates to Thunderbird packages within Mageia address numerous security vulnerabilities and enhance memory safety, improving overall stability.
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=27826

- https://www.mozilla.org/en-US/security/advisories/mfsa2020-56/

- https://www.thunderbird.net/en-US/thunderbird/78.6.0/releasenotes/

- 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 moderate memory corruption heap overflow memory safety Mageia sanitizer bypass

Resolution

SRPMS

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

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

Publication date: 17 Dec 2020
URL: https://advisories.mageia.org/MGASA-2020-0462.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 moderate memory corruption heap overflow memory safety Mageia sanitizer bypass

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