MGASA-2020-0330 - Updated dovecot packages fix security vulnerability

Publication date: 18 Aug 2020
URL: https://advisories.mageia.org/MGASA-2020-0330.html
Type: security
Affected Mageia releases: 7
CVE: CVE-2020-12100,
     CVE-2020-12673,
     CVE-2020-12674

CVE-2020-12100: Receiving mail with deeply nested MIME parts leads to resource
exhaustion as Dovecot attempts to parse it.
CVE-2020-12673: Dovecot's NTLM implementation does not correctly check message
buffer size, which leads to reading past allocation which can lead to crash.
CVE-2020-12674: Dovecot's RPA mechanism implementation accepts zero-length
message, which leads to assert-crash later on.

References:
- https://bugs.mageia.org/show_bug.cgi?id=27099
- https://dovecot.org/pipermail/dovecot-news/2020-August/000441.html
- https://dovecot.org/pipermail/dovecot-news/2020-August/000442.html
- https://dovecot.org/pipermail/dovecot-news/2020-August/000443.html
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-12100
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-12673
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-12674

SRPMS:
- 7/core/dovecot-2.3.11.3-1.mga7

Mageia 2020-0330: dovecot security update

CVE-2020-12100: Receiving mail with deeply nested MIME parts leads to resource exhaustion as Dovecot attempts to parse it

Summary

CVE-2020-12100: Receiving mail with deeply nested MIME parts leads to resource exhaustion as Dovecot attempts to parse it. CVE-2020-12673: Dovecot's NTLM implementation does not correctly check message buffer size, which leads to reading past allocation which can lead to crash. CVE-2020-12674: Dovecot's RPA mechanism implementation accepts zero-length message, which leads to assert-crash later on.

References

- https://bugs.mageia.org/show_bug.cgi?id=27099

- https://dovecot.org/pipermail/dovecot-news/2020-August/000441.html

- https://dovecot.org/pipermail/dovecot-news/2020-August/000442.html

- https://dovecot.org/pipermail/dovecot-news/2020-August/000443.html

- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-12100

- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-12673

- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-12674

Resolution

MGASA-2020-0330 - Updated dovecot packages fix security vulnerability

SRPMS

- 7/core/dovecot-2.3.11.3-1.mga7

Severity
Publication date: 18 Aug 2020
URL: https://advisories.mageia.org/MGASA-2020-0330.html
Type: security
CVE: CVE-2020-12100, CVE-2020-12673, CVE-2020-12674

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