Amazon Linux AMI update for samba



Risk Medium
Patch available YES
Number of vulnerabilities 1
CVE-ID CVE-2019-14907
CWE-ID CWE-20
Exploitation vector Local network
Public exploit N/A
Vulnerable software
 Amazon Linux AMI
Operating systems & Components / Operating system

Vendor Amazon Web Services

Security Bulletin

This security bulletin contains one medium risk vulnerability.

1) Improper input validation

EUVDB-ID: #VU24466

Risk: Medium

CVSSv4.0: 4.6 [CVSS:4.0/AV:A/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2019-14907

CWE-ID: CWE-20 - Improper input validation

Exploit availability: No

Description

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to incorrect processing of certain user-controlled string, if logging is enabled at level 3 or above. A remote attacker can send specially crafted data to the Samba DC and terminate Samba RPC server.

Mitigation

Update the affected packages:

i686:
    samba-common-libs-4.10.16-5.54.amzn1.i686
    samba-winbind-krb5-locator-4.10.16-5.54.amzn1.i686
    libwbclient-4.10.16-5.54.amzn1.i686
    samba-common-tools-4.10.16-5.54.amzn1.i686
    libsmbclient-4.10.16-5.54.amzn1.i686
    samba-4.10.16-5.54.amzn1.i686
    samba-client-libs-4.10.16-5.54.amzn1.i686
    samba-debuginfo-4.10.16-5.54.amzn1.i686
    libwbclient-devel-4.10.16-5.54.amzn1.i686
    samba-krb5-printing-4.10.16-5.54.amzn1.i686
    samba-libs-4.10.16-5.54.amzn1.i686
    libsmbclient-devel-4.10.16-5.54.amzn1.i686
    samba-winbind-4.10.16-5.54.amzn1.i686
    samba-test-libs-4.10.16-5.54.amzn1.i686
    samba-python-4.10.16-5.54.amzn1.i686
    ctdb-4.10.16-5.54.amzn1.i686
    samba-devel-4.10.16-5.54.amzn1.i686
    samba-winbind-clients-4.10.16-5.54.amzn1.i686
    samba-client-4.10.16-5.54.amzn1.i686
    ctdb-tests-4.10.16-5.54.amzn1.i686
    samba-python-test-4.10.16-5.54.amzn1.i686
    samba-test-4.10.16-5.54.amzn1.i686
    samba-winbind-modules-4.10.16-5.54.amzn1.i686

noarch:
    samba-common-4.10.16-5.54.amzn1.noarch
    samba-pidl-4.10.16-5.54.amzn1.noarch

src:
    samba-4.10.16-5.54.amzn1.src

x86_64:
    samba-krb5-printing-4.10.16-5.54.amzn1.x86_64
    samba-common-libs-4.10.16-5.54.amzn1.x86_64
    ctdb-tests-4.10.16-5.54.amzn1.x86_64
    samba-client-4.10.16-5.54.amzn1.x86_64
    samba-test-libs-4.10.16-5.54.amzn1.x86_64
    samba-winbind-modules-4.10.16-5.54.amzn1.x86_64
    samba-winbind-clients-4.10.16-5.54.amzn1.x86_64
    samba-4.10.16-5.54.amzn1.x86_64
    libsmbclient-devel-4.10.16-5.54.amzn1.x86_64
    samba-libs-4.10.16-5.54.amzn1.x86_64
    samba-winbind-4.10.16-5.54.amzn1.x86_64
    libwbclient-4.10.16-5.54.amzn1.x86_64
    samba-winbind-krb5-locator-4.10.16-5.54.amzn1.x86_64
    libwbclient-devel-4.10.16-5.54.amzn1.x86_64
    samba-python-4.10.16-5.54.amzn1.x86_64
    samba-devel-4.10.16-5.54.amzn1.x86_64
    ctdb-4.10.16-5.54.amzn1.x86_64
    samba-test-4.10.16-5.54.amzn1.x86_64
    libsmbclient-4.10.16-5.54.amzn1.x86_64
    samba-python-test-4.10.16-5.54.amzn1.x86_64
    samba-client-libs-4.10.16-5.54.amzn1.x86_64
    samba-debuginfo-4.10.16-5.54.amzn1.x86_64
    samba-common-tools-4.10.16-5.54.amzn1.x86_64

Vulnerable software versions

Amazon Linux AMI: All versions

CPE2.3 External links

https://alas.aws.amazon.com/ALAS-2020-1452.html


Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote authenticated user via the local network (LAN).

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.



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