Mageia 2020-0450: thunderbird security update

When reading SMTP server status codes, Thunderbird writes an integer value to a position on the stack that is intended to contain just one byte. Depending on processor architecture and stack layout, this leads to stack corruption that may be exploitable (CVE-2020-26970).

MGASA-2020-0450 - Updated thunderbird packages fix security vulnerability

Publication date: 05 Dec 2020
URL: https://advisories.mageia.org/MGASA-2020-0450.html
Type: security
Affected Mageia releases: 7
CVE: CVE-2020-26970

When reading SMTP server status codes, Thunderbird writes an integer value to a
position on the stack that is intended to contain just one byte. Depending on
processor architecture and stack layout, this leads to stack corruption that
may be exploitable (CVE-2020-26970).

References:
- https://bugs.mageia.org/show_bug.cgi?id=27707
- https://www.mozilla.org/en-US/security/advisories/mfsa2020-53/
- https://www.thunderbird.net/en-US/thunderbird/78.5.1/releasenotes/
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-26970

SRPMS:
- 7/core/thunderbird-78.5.1-1.mga7
- 7/core/thunderbird-l10n-78.5.1-1.mga7
- 7/core/rootcerts-20201201.00-1.mga7