Amazon Linux AMI update for samba

Published: 2022-12-10

Risk	Medium
Patch available	YES
Number of vulnerabilities	5
CVE-ID	CVE-2020-17049 CVE-2022-32742 CVE-2022-32744 CVE-2022-32745 CVE-2022-32746
CWE-ID	CWE-254 CWE-401 CWE-264 CWE-835 CWE-416
Exploitation vector	Network
Public exploit	N/A
Vulnerable software Subscribe	Amazon Linux AMI Operating systems & Components / Operating system samba Operating systems & Components / Operating system package or component
Vendor	Amazon Web Services

Security Bulletin

This security bulletin contains information about 5 vulnerabilities.

1) Security Features

EUVDB-ID: #VU48269

Risk: Low

CVSSv3.1: 5.8 [CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2020-17049

CWE-ID: CWE-254 - Security Features

Exploit availability: No

Description

The vulnerability allows a remote user to bypass authentication process.

The vulnerability exists due to security feature bypass issue in Kerberos. A remote administrator can bypass authentication process and gain unauthorized access to the application.

Mitigation

Update the affected packages:

i686:
    samba-devel-4.10.16-20.62.amzn1.i686
    samba-common-libs-4.10.16-20.62.amzn1.i686
    libwbclient-4.10.16-20.62.amzn1.i686
    samba-winbind-clients-4.10.16-20.62.amzn1.i686
    samba-python-4.10.16-20.62.amzn1.i686
    samba-debuginfo-4.10.16-20.62.amzn1.i686
    samba-client-libs-4.10.16-20.62.amzn1.i686
    samba-test-4.10.16-20.62.amzn1.i686
    libsmbclient-devel-4.10.16-20.62.amzn1.i686
    samba-winbind-modules-4.10.16-20.62.amzn1.i686
    samba-winbind-krb5-locator-4.10.16-20.62.amzn1.i686
    ctdb-tests-4.10.16-20.62.amzn1.i686
    samba-python-test-4.10.16-20.62.amzn1.i686
    samba-common-tools-4.10.16-20.62.amzn1.i686
    libwbclient-devel-4.10.16-20.62.amzn1.i686
    samba-libs-4.10.16-20.62.amzn1.i686
    samba-test-libs-4.10.16-20.62.amzn1.i686
    ctdb-4.10.16-20.62.amzn1.i686
    libsmbclient-4.10.16-20.62.amzn1.i686
    samba-krb5-printing-4.10.16-20.62.amzn1.i686
    samba-winbind-4.10.16-20.62.amzn1.i686
    samba-4.10.16-20.62.amzn1.i686
    samba-client-4.10.16-20.62.amzn1.i686

noarch:
    samba-pidl-4.10.16-20.62.amzn1.noarch
    samba-common-4.10.16-20.62.amzn1.noarch

src:
    samba-4.10.16-20.62.amzn1.src

x86_64:
    libsmbclient-devel-4.10.16-20.62.amzn1.x86_64
    samba-test-libs-4.10.16-20.62.amzn1.x86_64
    libwbclient-devel-4.10.16-20.62.amzn1.x86_64
    samba-python-4.10.16-20.62.amzn1.x86_64
    ctdb-4.10.16-20.62.amzn1.x86_64
    samba-4.10.16-20.62.amzn1.x86_64
    libwbclient-4.10.16-20.62.amzn1.x86_64
    samba-client-4.10.16-20.62.amzn1.x86_64
    samba-krb5-printing-4.10.16-20.62.amzn1.x86_64
    samba-winbind-modules-4.10.16-20.62.amzn1.x86_64
    samba-winbind-krb5-locator-4.10.16-20.62.amzn1.x86_64
    samba-devel-4.10.16-20.62.amzn1.x86_64
    samba-winbind-clients-4.10.16-20.62.amzn1.x86_64
    ctdb-tests-4.10.16-20.62.amzn1.x86_64
    samba-python-test-4.10.16-20.62.amzn1.x86_64
    samba-libs-4.10.16-20.62.amzn1.x86_64
    samba-test-4.10.16-20.62.amzn1.x86_64
    samba-common-tools-4.10.16-20.62.amzn1.x86_64
    samba-winbind-4.10.16-20.62.amzn1.x86_64
    samba-debuginfo-4.10.16-20.62.amzn1.x86_64
    libsmbclient-4.10.16-20.62.amzn1.x86_64
    samba-common-libs-4.10.16-20.62.amzn1.x86_64
    samba-client-libs-4.10.16-20.62.amzn1.x86_64

Vulnerable software versions

Amazon Linux AMI: All versions

samba: before 4.10.16-20.62

External links

http://alas.aws.amazon.com/ALAS-2022-1642.html

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote authenticated privileged user via the Internet.

Is there known malware, which exploits this vulnerability?

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

2) Memory leak

EUVDB-ID: #VU65824

Risk: Low

CVSSv3.1: 3.6 [CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:C/C:L/I:N/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2022-32742

CWE-ID: CWE-401 - Missing release of memory after effective lifetime

Exploit availability: No

Description

The vulnerability allows a remote user to gain access to sensitive information.

The vulnerability exists due memory leak when handling SMB1 requests. A remote user with ability to write data to a file share can force the application to leak memory and gain access to potentially sensitive information.

Mitigation

Update the affected packages:

i686:
    samba-devel-4.10.16-20.62.amzn1.i686
    samba-common-libs-4.10.16-20.62.amzn1.i686
    libwbclient-4.10.16-20.62.amzn1.i686
    samba-winbind-clients-4.10.16-20.62.amzn1.i686
    samba-python-4.10.16-20.62.amzn1.i686
    samba-debuginfo-4.10.16-20.62.amzn1.i686
    samba-client-libs-4.10.16-20.62.amzn1.i686
    samba-test-4.10.16-20.62.amzn1.i686
    libsmbclient-devel-4.10.16-20.62.amzn1.i686
    samba-winbind-modules-4.10.16-20.62.amzn1.i686
    samba-winbind-krb5-locator-4.10.16-20.62.amzn1.i686
    ctdb-tests-4.10.16-20.62.amzn1.i686
    samba-python-test-4.10.16-20.62.amzn1.i686
    samba-common-tools-4.10.16-20.62.amzn1.i686
    libwbclient-devel-4.10.16-20.62.amzn1.i686
    samba-libs-4.10.16-20.62.amzn1.i686
    samba-test-libs-4.10.16-20.62.amzn1.i686
    ctdb-4.10.16-20.62.amzn1.i686
    libsmbclient-4.10.16-20.62.amzn1.i686
    samba-krb5-printing-4.10.16-20.62.amzn1.i686
    samba-winbind-4.10.16-20.62.amzn1.i686
    samba-4.10.16-20.62.amzn1.i686
    samba-client-4.10.16-20.62.amzn1.i686

noarch:
    samba-pidl-4.10.16-20.62.amzn1.noarch
    samba-common-4.10.16-20.62.amzn1.noarch

src:
    samba-4.10.16-20.62.amzn1.src

x86_64:
    libsmbclient-devel-4.10.16-20.62.amzn1.x86_64
    samba-test-libs-4.10.16-20.62.amzn1.x86_64
    libwbclient-devel-4.10.16-20.62.amzn1.x86_64
    samba-python-4.10.16-20.62.amzn1.x86_64
    ctdb-4.10.16-20.62.amzn1.x86_64
    samba-4.10.16-20.62.amzn1.x86_64
    libwbclient-4.10.16-20.62.amzn1.x86_64
    samba-client-4.10.16-20.62.amzn1.x86_64
    samba-krb5-printing-4.10.16-20.62.amzn1.x86_64
    samba-winbind-modules-4.10.16-20.62.amzn1.x86_64
    samba-winbind-krb5-locator-4.10.16-20.62.amzn1.x86_64
    samba-devel-4.10.16-20.62.amzn1.x86_64
    samba-winbind-clients-4.10.16-20.62.amzn1.x86_64
    ctdb-tests-4.10.16-20.62.amzn1.x86_64
    samba-python-test-4.10.16-20.62.amzn1.x86_64
    samba-libs-4.10.16-20.62.amzn1.x86_64
    samba-test-4.10.16-20.62.amzn1.x86_64
    samba-common-tools-4.10.16-20.62.amzn1.x86_64
    samba-winbind-4.10.16-20.62.amzn1.x86_64
    samba-debuginfo-4.10.16-20.62.amzn1.x86_64
    libsmbclient-4.10.16-20.62.amzn1.x86_64
    samba-common-libs-4.10.16-20.62.amzn1.x86_64
    samba-client-libs-4.10.16-20.62.amzn1.x86_64

Vulnerable software versions

Amazon Linux AMI: All versions

samba: before 4.10.16-20.62

External links

http://alas.aws.amazon.com/ALAS-2022-1642.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.

3) Permissions, Privileges, and Access Controls

EUVDB-ID: #VU65825

Risk: Low

CVSSv3.1: 3.8 [CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2022-32744

CWE-ID: CWE-264 - Permissions, Privileges, and Access Controls

Exploit availability: No

Description

The vulnerability allows a remote user to force password change requests.

The vulnerability exists due to tickets received by the kpasswd service were decrypted without specifying that only that service's own keys should be tried. A remote user can force the server to accept tickets encrypted with any key and initiate password change requests for any Samba AD user.

Mitigation

Update the affected packages:

i686:
    samba-devel-4.10.16-20.62.amzn1.i686
    samba-common-libs-4.10.16-20.62.amzn1.i686
    libwbclient-4.10.16-20.62.amzn1.i686
    samba-winbind-clients-4.10.16-20.62.amzn1.i686
    samba-python-4.10.16-20.62.amzn1.i686
    samba-debuginfo-4.10.16-20.62.amzn1.i686
    samba-client-libs-4.10.16-20.62.amzn1.i686
    samba-test-4.10.16-20.62.amzn1.i686
    libsmbclient-devel-4.10.16-20.62.amzn1.i686
    samba-winbind-modules-4.10.16-20.62.amzn1.i686
    samba-winbind-krb5-locator-4.10.16-20.62.amzn1.i686
    ctdb-tests-4.10.16-20.62.amzn1.i686
    samba-python-test-4.10.16-20.62.amzn1.i686
    samba-common-tools-4.10.16-20.62.amzn1.i686
    libwbclient-devel-4.10.16-20.62.amzn1.i686
    samba-libs-4.10.16-20.62.amzn1.i686
    samba-test-libs-4.10.16-20.62.amzn1.i686
    ctdb-4.10.16-20.62.amzn1.i686
    libsmbclient-4.10.16-20.62.amzn1.i686
    samba-krb5-printing-4.10.16-20.62.amzn1.i686
    samba-winbind-4.10.16-20.62.amzn1.i686
    samba-4.10.16-20.62.amzn1.i686
    samba-client-4.10.16-20.62.amzn1.i686

noarch:
    samba-pidl-4.10.16-20.62.amzn1.noarch
    samba-common-4.10.16-20.62.amzn1.noarch

src:
    samba-4.10.16-20.62.amzn1.src

x86_64:
    libsmbclient-devel-4.10.16-20.62.amzn1.x86_64
    samba-test-libs-4.10.16-20.62.amzn1.x86_64
    libwbclient-devel-4.10.16-20.62.amzn1.x86_64
    samba-python-4.10.16-20.62.amzn1.x86_64
    ctdb-4.10.16-20.62.amzn1.x86_64
    samba-4.10.16-20.62.amzn1.x86_64
    libwbclient-4.10.16-20.62.amzn1.x86_64
    samba-client-4.10.16-20.62.amzn1.x86_64
    samba-krb5-printing-4.10.16-20.62.amzn1.x86_64
    samba-winbind-modules-4.10.16-20.62.amzn1.x86_64
    samba-winbind-krb5-locator-4.10.16-20.62.amzn1.x86_64
    samba-devel-4.10.16-20.62.amzn1.x86_64
    samba-winbind-clients-4.10.16-20.62.amzn1.x86_64
    ctdb-tests-4.10.16-20.62.amzn1.x86_64
    samba-python-test-4.10.16-20.62.amzn1.x86_64
    samba-libs-4.10.16-20.62.amzn1.x86_64
    samba-test-4.10.16-20.62.amzn1.x86_64
    samba-common-tools-4.10.16-20.62.amzn1.x86_64
    samba-winbind-4.10.16-20.62.amzn1.x86_64
    samba-debuginfo-4.10.16-20.62.amzn1.x86_64
    libsmbclient-4.10.16-20.62.amzn1.x86_64
    samba-common-libs-4.10.16-20.62.amzn1.x86_64
    samba-client-libs-4.10.16-20.62.amzn1.x86_64

Vulnerable software versions

Amazon Linux AMI: All versions

samba: before 4.10.16-20.62

External links

http://alas.aws.amazon.com/ALAS-2022-1642.html

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote authenticated user via the Internet.

Is there known malware, which exploits this vulnerability?

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

4) Infinite loop

EUVDB-ID: #VU65826

Risk: Medium

CVSSv3.1: 5.7 [CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2022-32745

CWE-ID: CWE-835 - Loop with Unreachable Exit Condition ('Infinite Loop')

Exploit availability: No

Description

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

The vulnerability exists due to infinite loop when processing LDAP requests. A remote user can send a specially crafted LDAP request to the server, consume all available system resources and cause denial of service conditions.

Mitigation

Update the affected packages:

i686:
    samba-devel-4.10.16-20.62.amzn1.i686
    samba-common-libs-4.10.16-20.62.amzn1.i686
    libwbclient-4.10.16-20.62.amzn1.i686
    samba-winbind-clients-4.10.16-20.62.amzn1.i686
    samba-python-4.10.16-20.62.amzn1.i686
    samba-debuginfo-4.10.16-20.62.amzn1.i686
    samba-client-libs-4.10.16-20.62.amzn1.i686
    samba-test-4.10.16-20.62.amzn1.i686
    libsmbclient-devel-4.10.16-20.62.amzn1.i686
    samba-winbind-modules-4.10.16-20.62.amzn1.i686
    samba-winbind-krb5-locator-4.10.16-20.62.amzn1.i686
    ctdb-tests-4.10.16-20.62.amzn1.i686
    samba-python-test-4.10.16-20.62.amzn1.i686
    samba-common-tools-4.10.16-20.62.amzn1.i686
    libwbclient-devel-4.10.16-20.62.amzn1.i686
    samba-libs-4.10.16-20.62.amzn1.i686
    samba-test-libs-4.10.16-20.62.amzn1.i686
    ctdb-4.10.16-20.62.amzn1.i686
    libsmbclient-4.10.16-20.62.amzn1.i686
    samba-krb5-printing-4.10.16-20.62.amzn1.i686
    samba-winbind-4.10.16-20.62.amzn1.i686
    samba-4.10.16-20.62.amzn1.i686
    samba-client-4.10.16-20.62.amzn1.i686

noarch:
    samba-pidl-4.10.16-20.62.amzn1.noarch
    samba-common-4.10.16-20.62.amzn1.noarch

src:
    samba-4.10.16-20.62.amzn1.src

x86_64:
    libsmbclient-devel-4.10.16-20.62.amzn1.x86_64
    samba-test-libs-4.10.16-20.62.amzn1.x86_64
    libwbclient-devel-4.10.16-20.62.amzn1.x86_64
    samba-python-4.10.16-20.62.amzn1.x86_64
    ctdb-4.10.16-20.62.amzn1.x86_64
    samba-4.10.16-20.62.amzn1.x86_64
    libwbclient-4.10.16-20.62.amzn1.x86_64
    samba-client-4.10.16-20.62.amzn1.x86_64
    samba-krb5-printing-4.10.16-20.62.amzn1.x86_64
    samba-winbind-modules-4.10.16-20.62.amzn1.x86_64
    samba-winbind-krb5-locator-4.10.16-20.62.amzn1.x86_64
    samba-devel-4.10.16-20.62.amzn1.x86_64
    samba-winbind-clients-4.10.16-20.62.amzn1.x86_64
    ctdb-tests-4.10.16-20.62.amzn1.x86_64
    samba-python-test-4.10.16-20.62.amzn1.x86_64
    samba-libs-4.10.16-20.62.amzn1.x86_64
    samba-test-4.10.16-20.62.amzn1.x86_64
    samba-common-tools-4.10.16-20.62.amzn1.x86_64
    samba-winbind-4.10.16-20.62.amzn1.x86_64
    samba-debuginfo-4.10.16-20.62.amzn1.x86_64
    libsmbclient-4.10.16-20.62.amzn1.x86_64
    samba-common-libs-4.10.16-20.62.amzn1.x86_64
    samba-client-libs-4.10.16-20.62.amzn1.x86_64

Vulnerable software versions

Amazon Linux AMI: All versions

samba: before 4.10.16-20.62

External links

http://alas.aws.amazon.com/ALAS-2022-1642.html

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote authenticated user via the Internet.

Is there known malware, which exploits this vulnerability?

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

5) Use-after-free

EUVDB-ID: #VU65827

Risk: Low

CVSSv3.1: 2.1 [CVSS:3.1/AV:A/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:L/E:U/RL:O/RC:C]

CVE-ID: CVE-2022-32746

CWE-ID: CWE-416 - Use After Free

Exploit availability: No

Description

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

The vulnerability exists due to a use-after-free error when handling LDAP requests. A remote user with ability to edit privileged properties, such as userAccountControl, can send a specially crafted LDAP request to the server, trigger a use-after-free error and perform a denial of service (DoS) attack.

Mitigation

Update the affected packages:

i686:
    samba-devel-4.10.16-20.62.amzn1.i686
    samba-common-libs-4.10.16-20.62.amzn1.i686
    libwbclient-4.10.16-20.62.amzn1.i686
    samba-winbind-clients-4.10.16-20.62.amzn1.i686
    samba-python-4.10.16-20.62.amzn1.i686
    samba-debuginfo-4.10.16-20.62.amzn1.i686
    samba-client-libs-4.10.16-20.62.amzn1.i686
    samba-test-4.10.16-20.62.amzn1.i686
    libsmbclient-devel-4.10.16-20.62.amzn1.i686
    samba-winbind-modules-4.10.16-20.62.amzn1.i686
    samba-winbind-krb5-locator-4.10.16-20.62.amzn1.i686
    ctdb-tests-4.10.16-20.62.amzn1.i686
    samba-python-test-4.10.16-20.62.amzn1.i686
    samba-common-tools-4.10.16-20.62.amzn1.i686
    libwbclient-devel-4.10.16-20.62.amzn1.i686
    samba-libs-4.10.16-20.62.amzn1.i686
    samba-test-libs-4.10.16-20.62.amzn1.i686
    ctdb-4.10.16-20.62.amzn1.i686
    libsmbclient-4.10.16-20.62.amzn1.i686
    samba-krb5-printing-4.10.16-20.62.amzn1.i686
    samba-winbind-4.10.16-20.62.amzn1.i686
    samba-4.10.16-20.62.amzn1.i686
    samba-client-4.10.16-20.62.amzn1.i686

noarch:
    samba-pidl-4.10.16-20.62.amzn1.noarch
    samba-common-4.10.16-20.62.amzn1.noarch

src:
    samba-4.10.16-20.62.amzn1.src

x86_64:
    libsmbclient-devel-4.10.16-20.62.amzn1.x86_64
    samba-test-libs-4.10.16-20.62.amzn1.x86_64
    libwbclient-devel-4.10.16-20.62.amzn1.x86_64
    samba-python-4.10.16-20.62.amzn1.x86_64
    ctdb-4.10.16-20.62.amzn1.x86_64
    samba-4.10.16-20.62.amzn1.x86_64
    libwbclient-4.10.16-20.62.amzn1.x86_64
    samba-client-4.10.16-20.62.amzn1.x86_64
    samba-krb5-printing-4.10.16-20.62.amzn1.x86_64
    samba-winbind-modules-4.10.16-20.62.amzn1.x86_64
    samba-winbind-krb5-locator-4.10.16-20.62.amzn1.x86_64
    samba-devel-4.10.16-20.62.amzn1.x86_64
    samba-winbind-clients-4.10.16-20.62.amzn1.x86_64
    ctdb-tests-4.10.16-20.62.amzn1.x86_64
    samba-python-test-4.10.16-20.62.amzn1.x86_64
    samba-libs-4.10.16-20.62.amzn1.x86_64
    samba-test-4.10.16-20.62.amzn1.x86_64
    samba-common-tools-4.10.16-20.62.amzn1.x86_64
    samba-winbind-4.10.16-20.62.amzn1.x86_64
    samba-debuginfo-4.10.16-20.62.amzn1.x86_64
    libsmbclient-4.10.16-20.62.amzn1.x86_64
    samba-common-libs-4.10.16-20.62.amzn1.x86_64
    samba-client-libs-4.10.16-20.62.amzn1.x86_64

Vulnerable software versions

Amazon Linux AMI: All versions

samba: before 4.10.16-20.62

External links

http://alas.aws.amazon.com/ALAS-2022-1642.html

Q & A

Can this vulnerability be exploited remotely?

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

Is there known malware, which exploits this vulnerability?

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