Debian update for samba

1) Security restrictions bypass

EUVDB-ID: #VU65820

Risk: Medium

CVSSv4.0: 6 [CVSS:4.0/AV:A/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2022-2031

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

Exploit availability: No

Description

The vulnerability allows a remote user to escalate privileges on the system.

The vulnerability exists due to the way the KDC kpasswd service handles password change requests. A remote user can escalate privileges on the system.

Mitigation

Update samba package to version 2:4.13.13+dfsg-1~deb11u5.

Vulnerable software versions

Debian Linux: All versions

samba (Debian package): before 2:4.13.13+dfsg-1~deb11u5

CPE2.3

• cpe:2.3:o:debian:debian_linux:*:*:*:*:*:*:*:*
• cpe:2.3:o:debian:samba_debian_package:*:*:*:*:*:debian_linux:*:*

External links

https://www.debian.org/security/2022/dsa-5205

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.

2) Memory leak

EUVDB-ID: #VU65824

Risk: Low

CVSSv4.0: 1.2 [CVSS:4.0/AV:A/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:L/SI:N/SA:N/E:U/U:Clear]

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 samba package to version 2:4.13.13+dfsg-1~deb11u5.

Vulnerable software versions

Debian Linux: All versions

samba (Debian package): before 2:4.13.13+dfsg-1~deb11u5

CPE2.3

• cpe:2.3:o:debian:debian_linux:*:*:*:*:*:*:*:*
• cpe:2.3:o:debian:samba_debian_package:*:*:*:*:*:debian_linux:*:*

External links

https://www.debian.org/security/2022/dsa-5205

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

CVSSv4.0: 1.3 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear]

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 samba package to version 2:4.13.13+dfsg-1~deb11u5.

Vulnerable software versions

Debian Linux: All versions

samba (Debian package): before 2:4.13.13+dfsg-1~deb11u5

CPE2.3

• cpe:2.3:o:debian:debian_linux:*:*:*:*:*:*:*:*
• cpe:2.3:o:debian:samba_debian_package:*:*:*:*:*:debian_linux:*:*

External links

https://www.debian.org/security/2022/dsa-5205

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

CVSSv4.0: 4.9 [CVSS:4.0/AV:N/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-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 samba package to version 2:4.13.13+dfsg-1~deb11u5.

Vulnerable software versions

Debian Linux: All versions

samba (Debian package): before 2:4.13.13+dfsg-1~deb11u5

CPE2.3

• cpe:2.3:o:debian:debian_linux:*:*:*:*:*:*:*:*
• cpe:2.3:o:debian:samba_debian_package:*:*:*:*:*:debian_linux:*:*

External links

https://www.debian.org/security/2022/dsa-5205

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

CVSSv4.0: 1.1 [CVSS:4.0/AV:A/AC:L/AT:N/PR:H/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U/U:Clear]

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 samba package to version 2:4.13.13+dfsg-1~deb11u5.

Vulnerable software versions

Debian Linux: All versions

samba (Debian package): before 2:4.13.13+dfsg-1~deb11u5

CPE2.3

• cpe:2.3:o:debian:debian_linux:*:*:*:*:*:*:*:*
• cpe:2.3:o:debian:samba_debian_package:*:*:*:*:*:debian_linux:*:*

External links

https://www.debian.org/security/2022/dsa-5205

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.