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             AUSCERT External Security Bulletin Redistribution

                     dovecot: Multiple vulnerabilities
                              29 August 2019


        AusCERT Security Bulletin Summary

Product:           Dovecot
Publisher:         FreeBSD
Operating System:  FreeBSD
Impact/Access:     Execute Arbitrary Code/Commands -- Existing Account
                   Denial of Service               -- Existing Account
Resolution:        Patch/Upgrade
CVE Names:         CVE-2019-11500  

Reference:         ESB-2019.3261

Original Bulletin: 

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Dovecot -- improper input validation

Affected packages
  dovecot            <
  dovecot-pigeonhole <


VuXML ID  abaaecda-ea16-43e2-bad0-d34a9ac576b1
Discovery 2019-04-13
Entry     2019-08-28

Aki Tuomi reports:

    Vulnerability Details: IMAP and ManageSieve protocol parsers do not
    properly handle NUL byte when scanning data in quoted strings, leading to
    out of bounds heap memory writes. Risk: This vulnerability allows for
    out-of-bounds writes to objects stored on the heap up to 8096 bytes in
    pre-login phase, and 65536 bytes post-login phase, allowing sufficiently
    skilled attacker to perform complicated attacks that can lead to leaking
    private information or remote code execution. Abuse of this bug is very
    difficult to observe, as it does not necessarily cause a crash. Attempts to
    abuse this bug are not directly evident from logs.



CVE Name CVE-2019-11500
URL      https://dovecot.org/pipermail/dovecot/2019-August/116874.html

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