ALAS2-2020-1459

Amazon Linux 2 Security Advisory: ALAS-2020-1459
Advisory Release Date: 2020-07-14 02:45 Pacific
Advisory Updated Date: 2020-07-17 00:43 Pacific
Severity: Medium
Issue Overview:

A flaw was found in the samba client, all samba versions before samba 4.11.2, 4.10.10 and 4.9.15, where a malicious server can supply a pathname to the client with separators. This could allow the client to access files and folders outside of the SMB network pathnames. An attacker could use this vulnerability to create files outside of the current working directory using the privileges of the client user. (CVE-2019-10218)

A flaw was found in samba versions 4.9.x up to 4.9.13, samba 4.10.x up to 4.10.8 and samba 4.11.x up to 4.11.0rc3, when certain parameters were set in the samba configuration file. An unauthenticated attacker could use this flaw to escape the shared directory and access the contents of directories outside the share. (CVE-2019-10197)


Affected Packages:

samba


Note:

This advisory is applicable to Amazon Linux 2 (AL2) Core repository. Visit this FAQ section for the difference between AL2 Core and AL2 Extras advisories.


Issue Correction:
Run yum update samba to update your system.

New Packages:
aarch64:
    samba-4.10.4-11.amzn2.0.1.aarch64
    samba-client-4.10.4-11.amzn2.0.1.aarch64
    samba-client-libs-4.10.4-11.amzn2.0.1.aarch64
    samba-common-libs-4.10.4-11.amzn2.0.1.aarch64
    samba-common-tools-4.10.4-11.amzn2.0.1.aarch64
    samba-dc-4.10.4-11.amzn2.0.1.aarch64
    samba-dc-libs-4.10.4-11.amzn2.0.1.aarch64
    samba-devel-4.10.4-11.amzn2.0.1.aarch64
    samba-krb5-printing-4.10.4-11.amzn2.0.1.aarch64
    samba-libs-4.10.4-11.amzn2.0.1.aarch64
    libsmbclient-4.10.4-11.amzn2.0.1.aarch64
    libsmbclient-devel-4.10.4-11.amzn2.0.1.aarch64
    libwbclient-4.10.4-11.amzn2.0.1.aarch64
    libwbclient-devel-4.10.4-11.amzn2.0.1.aarch64
    samba-python-4.10.4-11.amzn2.0.1.aarch64
    samba-python-test-4.10.4-11.amzn2.0.1.aarch64
    samba-test-4.10.4-11.amzn2.0.1.aarch64
    samba-test-libs-4.10.4-11.amzn2.0.1.aarch64
    samba-winbind-4.10.4-11.amzn2.0.1.aarch64
    samba-winbind-clients-4.10.4-11.amzn2.0.1.aarch64
    samba-winbind-krb5-locator-4.10.4-11.amzn2.0.1.aarch64
    samba-winbind-modules-4.10.4-11.amzn2.0.1.aarch64
    ctdb-4.10.4-11.amzn2.0.1.aarch64
    ctdb-tests-4.10.4-11.amzn2.0.1.aarch64
    samba-debuginfo-4.10.4-11.amzn2.0.1.aarch64

i686:
    samba-4.10.4-11.amzn2.0.1.i686
    samba-client-4.10.4-11.amzn2.0.1.i686
    samba-client-libs-4.10.4-11.amzn2.0.1.i686
    samba-common-libs-4.10.4-11.amzn2.0.1.i686
    samba-common-tools-4.10.4-11.amzn2.0.1.i686
    samba-dc-4.10.4-11.amzn2.0.1.i686
    samba-dc-libs-4.10.4-11.amzn2.0.1.i686
    samba-devel-4.10.4-11.amzn2.0.1.i686
    samba-krb5-printing-4.10.4-11.amzn2.0.1.i686
    samba-libs-4.10.4-11.amzn2.0.1.i686
    libsmbclient-4.10.4-11.amzn2.0.1.i686
    libsmbclient-devel-4.10.4-11.amzn2.0.1.i686
    libwbclient-4.10.4-11.amzn2.0.1.i686
    libwbclient-devel-4.10.4-11.amzn2.0.1.i686
    samba-python-4.10.4-11.amzn2.0.1.i686
    samba-python-test-4.10.4-11.amzn2.0.1.i686
    samba-test-4.10.4-11.amzn2.0.1.i686
    samba-test-libs-4.10.4-11.amzn2.0.1.i686
    samba-winbind-4.10.4-11.amzn2.0.1.i686
    samba-winbind-clients-4.10.4-11.amzn2.0.1.i686
    samba-winbind-krb5-locator-4.10.4-11.amzn2.0.1.i686
    samba-winbind-modules-4.10.4-11.amzn2.0.1.i686
    ctdb-4.10.4-11.amzn2.0.1.i686
    ctdb-tests-4.10.4-11.amzn2.0.1.i686
    samba-debuginfo-4.10.4-11.amzn2.0.1.i686

noarch:
    samba-common-4.10.4-11.amzn2.0.1.noarch
    samba-pidl-4.10.4-11.amzn2.0.1.noarch

src:
    samba-4.10.4-11.amzn2.0.1.src

x86_64:
    samba-4.10.4-11.amzn2.0.1.x86_64
    samba-client-4.10.4-11.amzn2.0.1.x86_64
    samba-client-libs-4.10.4-11.amzn2.0.1.x86_64
    samba-common-libs-4.10.4-11.amzn2.0.1.x86_64
    samba-common-tools-4.10.4-11.amzn2.0.1.x86_64
    samba-dc-4.10.4-11.amzn2.0.1.x86_64
    samba-dc-libs-4.10.4-11.amzn2.0.1.x86_64
    samba-devel-4.10.4-11.amzn2.0.1.x86_64
    samba-vfs-glusterfs-4.10.4-11.amzn2.0.1.x86_64
    samba-krb5-printing-4.10.4-11.amzn2.0.1.x86_64
    samba-libs-4.10.4-11.amzn2.0.1.x86_64
    libsmbclient-4.10.4-11.amzn2.0.1.x86_64
    libsmbclient-devel-4.10.4-11.amzn2.0.1.x86_64
    libwbclient-4.10.4-11.amzn2.0.1.x86_64
    libwbclient-devel-4.10.4-11.amzn2.0.1.x86_64
    samba-python-4.10.4-11.amzn2.0.1.x86_64
    samba-python-test-4.10.4-11.amzn2.0.1.x86_64
    samba-test-4.10.4-11.amzn2.0.1.x86_64
    samba-test-libs-4.10.4-11.amzn2.0.1.x86_64
    samba-winbind-4.10.4-11.amzn2.0.1.x86_64
    samba-winbind-clients-4.10.4-11.amzn2.0.1.x86_64
    samba-winbind-krb5-locator-4.10.4-11.amzn2.0.1.x86_64
    samba-winbind-modules-4.10.4-11.amzn2.0.1.x86_64
    ctdb-4.10.4-11.amzn2.0.1.x86_64
    ctdb-tests-4.10.4-11.amzn2.0.1.x86_64
    samba-debuginfo-4.10.4-11.amzn2.0.1.x86_64

Additional References

Red Hat: CVE-2019-10197, CVE-2019-10218

Mitre: CVE-2019-10197, CVE-2019-10218