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Samba 4.7.3 Security Release

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Der Open-Source SMB Fileserver und Domaincontroler, Samba, erhielt heute ein Security Update. Dieses schließt zwei bekannte Sicherheitslücken und behebt zwei Bugs.

Samba 4.7.3 Release Notes

  • CVE-2017-14746:
    All versions of Samba from 4.0.0 onwards are vulnerable to a use after
    free vulnerability, where a malicious SMB1 request can be used to
    control the contents of heap memory via a deallocated heap pointer. It
    is possible this may be used to compromise the SMB server.
  • CVE-2017-15275:
    All versions of Samba from 3.6.0 onwards are vulnerable to a heap
    memory information leak, where server allocated heap memory may be
    returned to the client without being cleared.

There is no known vulnerability associated with this error, but
uncleared heap memory may contain previously used data that may help
an attacker compromise the server via other methods. Uncleared heap
memory may potentially contain password hashes or other high-value

Changes since 4.7.2:

  • BUG 13041: CVE-2017-14746: s3: smbd: Fix SMB1 use-after-free crash bug.
  • BUG 13077: CVE-2017-15275: s3: smbd: Chain code can return uninitialized
    memory when talloc buffer is grown.

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