Integer underflow in samba (Alpine package)



Risk Medium
Patch available YES
Number of vulnerabilities 1
CVE-ID CVE-2016-2123
CWE-ID CWE-191
Exploitation vector Local network
Public exploit N/A
Vulnerable software
samba (Alpine package)
Operating systems & Components / Operating system package or component

Vendor Alpine Linux Development Team

Security Bulletin

This security bulletin contains one medium risk vulnerability.

1) Integer underflow

EUVDB-ID: #VU6632

Risk: Medium

CVSSv4.0: 7.6 [CVSS:4.0/AV:A/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/E:U/U:Green]

CVE-ID: CVE-2016-2123

CWE-ID: CWE-191 - Integer underflow

Exploit availability: No

Description

The vulnerability allows a remote authenticated user to compromise vulnerable server.

The vulnerability exists due to integer underflow within ndr_pull_dnsp_name routine when processing dnsRecord attribute in LDAP requests. A remote authenticated attacker can send a specially crafted LDAP request to the affected server, trigger heap-based buffer overflow and execute arbitrary code on the target sever.

Successful exploitation of the vulnerability may allow an attacker to compromise vulnerable server.

Mitigation

Install update from vendor's website.

Vulnerable software versions

samba (Alpine package): 4.1.1-r0 - 4.2.14-r0

CPE2.3 External links

https://git.alpinelinux.org/aports/commit/?id=70271759e87dbeef4f90e6dcae9183d5ea5e3048
https://git.alpinelinux.org/aports/commit/?id=3dfb07619755d258fed8bfd510b53e3d8a692361
https://git.alpinelinux.org/aports/commit/?id=80cc0ea448006f152c00467301743534bcd0ee65


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.



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