Fedora 36 update for libldb, samba



Risk Medium
Patch available YES
Number of vulnerabilities 5
CVE-ID CVE-2022-32742
CVE-2022-32744
CVE-2022-32745
CVE-2022-32746
CVE-2020-17049
CWE-ID CWE-401
CWE-264
CWE-835
CWE-416
CWE-254
Exploitation vector Network
Public exploit N/A
Vulnerable software
 Fedora
Operating systems & Components / Operating system

samba
Operating systems & Components / Operating system package or component

libldb
Operating systems & Components / Operating system package or component

Vendor Fedoraproject

Security Bulletin

This security bulletin contains information about 5 vulnerabilities.

1) 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

Install updates from vendor's repository.

Vulnerable software versions

Fedora: 36

samba: before 4.16.4-0.fc36

libldb: before 2.5.2-1.fc36

CPE2.3 External links

https://bodhi.fedoraproject.org/updates/FEDORA-2022-19600c9743


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) 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

Install updates from vendor's repository.

Vulnerable software versions

Fedora: 36

samba: before 4.16.4-0.fc36

libldb: before 2.5.2-1.fc36

CPE2.3 External links

https://bodhi.fedoraproject.org/updates/FEDORA-2022-19600c9743


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.

3) 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

Install updates from vendor's repository.

Vulnerable software versions

Fedora: 36

samba: before 4.16.4-0.fc36

libldb: before 2.5.2-1.fc36

CPE2.3 External links

https://bodhi.fedoraproject.org/updates/FEDORA-2022-19600c9743


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) 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

Install updates from vendor's repository.

Vulnerable software versions

Fedora: 36

samba: before 4.16.4-0.fc36

libldb: before 2.5.2-1.fc36

CPE2.3 External links

https://bodhi.fedoraproject.org/updates/FEDORA-2022-19600c9743


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.

5) Security Features

EUVDB-ID: #VU48269

Risk: Low

CVSSv4.0: 4.8 [CVSS:4.0/AV:N/AC:L/AT:P/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear]

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

Install updates from vendor's repository.

Vulnerable software versions

Fedora: 36

samba: before 4.16.4-0.fc36

libldb: before 2.5.2-1.fc36

CPE2.3 External links

https://bodhi.fedoraproject.org/updates/FEDORA-2022-19600c9743


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.



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