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             AUSCERT External Security Bulletin Redistribution

        ClamAV 0.101.4 released with new vulnerability and complete
                      fix for previous vulnerability
                              26 August 2019


        AusCERT Security Bulletin Summary

Product:           ClamAV
Publisher:         ClamAV
Operating System:  UNIX variants (UNIX, Linux, OSX)
Impact/Access:     Denial of Service -- Remote/Unauthenticated
Resolution:        Patch/Upgrade
CVE Names:         CVE-2019-12900 CVE-2019-12625 

Reference:         ESB-2019.2276

Original Bulletin: 

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ClamAV blog

Wednesday, August 21, 2019

ClamAV 0.101.4 security patch release has been published

Today we have published the ClamAV 0.101.4 security patch release.


ClamAV 0.101.4 is a security patch release that addresses the following issues.

  *  An out of bounds write was possible within ClamAV's NSIS bzip2 library
    when attempting decompression in cases where the number of selectors
    exceeded the max limit set by the library (CVE-2019-12900). The issue has
    been resolved by respecting that limit.

    Thanks to Martin Simmons for reporting the issue here.
  *  The zip bomb vulnerability mitigated in 0.101.3 has been assigned the CVE
    identifier CVE-2019-12625. Unfortunately, a workaround for the zip-bomb
    mitigation was immediately identified. To remediate the zip-bomb scan time
    issue, a scan time limit has been introduced in 0.101.4. This limit now
    resolves ClamAV's vulnerability to CVE-2019-12625.

    The default scan time limit is 2 minutes (120000 milliseconds).

    To customize the time limit:
    - use the clamscan  --max-scantime option
    - use the clamd  MaxScanTime config option

    Libclamav users may customize the time limit using the cl_engine_set_num
    function. For example:

        cl_engine_set_num(engine, CL_ENGINE_MAX_SCANTIME,

    Thanks to David Fifield for reviewing the zip-bomb mitigation in 0.101.3
    and reporting the issue.

As usual, ClamAV may be downloaded from https://www.clamav.net/downloads, and
discussion should take place on the ClamAV-Users list.  Thanks!

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