Ubuntu 16.04 LTS regresson update for Samba



Risk Medium
Patch available YES
Number of vulnerabilities 1
CVE-ID CVE-2020-10704
CWE-ID CWE-121
Exploitation vector Local network
Public exploit N/A
Vulnerable software
 samba (Ubuntu package)
Operating systems & Components / Operating system package or component

Vendor Canonical Ltd.

Security Bulletin

This security bulletin contains one medium risk vulnerability.

1) Stack-based buffer overflow

EUVDB-ID: #VU27377

Risk: Medium

CVSSv4.0: 4.9 [CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2020-10704

CWE-ID: CWE-121 - Stack-based buffer overflow

Exploit availability: No

Description

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

The vulnerability exists due to a boundary error when processing LDAP queries. A remote unauthenticated attacker can send large CLDAP packets to the affected system, trigger stack overflow and crash the service.

Mitigation

Update the affected packages.

Ubuntu 16.04 LTS
samba - 2:4.3.11+dfsg-0ubuntu0.16.04.27

Vulnerable software versions

samba (Ubuntu package): 2:4.3.11+dfsg-0ubuntu0.16.04.1 - 2:4.3.11+dfsg-0ubuntu0.16.04.26

CPE2.3 External links

https://usn.ubuntu.com/4341-3/


Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the local network (LAN).

Is there known malware, which exploits this vulnerability?

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



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