Fedora 36 update for samba



Risk Medium
Patch available YES
Number of vulnerabilities 2
CVE-ID CVE-2022-3592
CVE-2022-3437
CWE-ID CWE-61
CWE-122
Exploitation vector Network
Public exploit N/A
Vulnerable software
 Fedora
Operating systems & Components / Operating system

samba
Operating systems & Components / Operating system package or component

Vendor Fedoraproject

Security Bulletin

This security bulletin contains information about 2 vulnerabilities.

1) UNIX symbolic link following

EUVDB-ID: #VU68700

Risk: Medium

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

CVE-ID: CVE-2022-3592

CWE-ID: CWE-61 - UNIX Symbolic Link (Symlink) Following

Exploit availability: No

Description

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

The vulnerability exists due to a symlink following issue. A remote user with access to the exported part of the file system under a share via SMB1 unix extensions or NFS can create symlinks to files outside of the smbd configured share path and access otherwise restricted files on the server. 

Mitigation

Install updates from vendor's repository.

Vulnerable software versions

Fedora: 36

samba: before 4.16.6-0.fc36

CPE2.3 External links

https://bodhi.fedoraproject.org/updates/FEDORA-2022-3dcb5a3785


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) Heap-based buffer overflow

EUVDB-ID: #VU68701

Risk: Low

CVSSv4.0: 0.6 [CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:N/VI:L/VA:L/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2022-3437

CWE-ID: CWE-122 - Heap-based Buffer Overflow

Exploit availability: No

Description

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

The vulnerability exists due to a boundary error within the GSSAPI unwrap_des() and unwrap_des3() routines of Heimdal. A remote user can send specially crafted data to the application, trigger a heap-based buffer overflow and perform a denial of service (DoS) attack.


Mitigation

Install updates from vendor's repository.

Vulnerable software versions

Fedora: 36

samba: before 4.16.6-0.fc36

CPE2.3 External links

https://bodhi.fedoraproject.org/updates/FEDORA-2022-3dcb5a3785


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.



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