PT-2016-3329 · Samba Team+4 · Samba+3

Huzaifa S. Sidhpurwala · Published 2016-12-19 · Updated 2024-06-15 · CVE-2016-2123

Positive Technologies (AI Summary)

CVSS v3.1

8.1

High

Base vector

AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

Name of the Vulnerable Software and Affected Versions Samba versions 4.0.0 through 4.5.2

Description A flaw in the Samba routine ndr pull dnsp name contains an integer wrap problem, leading to an attacker-controlled memory overwrite. This routine parses data from the Samba Active Directory ldb database. Any user who can write to the dnsRecord attribute over LDAP can trigger this memory corruption. By default, all authenticated LDAP users can write to the dnsRecord attribute on new DNS objects, making this a remote privilege escalation issue.

Recommendations For Samba versions 4.0.0 through 4.5.2, consider restricting access to the dnsRecord attribute over LDAP to prevent exploitation until a patch is available. As a temporary workaround, limit the privileges of authenticated LDAP users to minimize the risk of remote privilege escalation.

Exploit

Fix

Heap Based Buffer Overflow

Buffer Overflow

Weakness Enumeration

CWE-122

CWE-119

Related Identifiers

ALT-PU-2016-2465

ALT-PU-2016-2466

ALT-PU-2018-2488

ALT-PU-2018-2489

BDU:2021-01289

CVE-2016-2123

DSA-3740-1

ECHO-66D0-8AED-029E

OPENSUSE-SU-2024:11365-1

SUSE-SU-2016:3271-1

SUSE-SU-2016:3272-1

SUSE-SU-2016:3299-1

SUSE-SU-2016_3271-1

SUSE-SU-2016_3272-1

SUSE-SU-2016_3299-1

USN-3158-1

ZDI-17-053

Affected Products

Alt Linux

Samba

Suse

Ubuntu

References · 112

• 🔥 https://github.com/rapid7/metasploit-framework/blob/master/modules/exploits/linux/samba/is_known_pipename.rb · Exploit
• 🔥 https://github.com/qazbnm456/awesome-cve-poc/blob/master/CVE-2017-7494.md · Exploit
• 🔥 https://github.com/opsxcq/exploit-CVE-2017-7494 · Exploit
• 🔥 https://github.com/joxeankoret/CVE-2017-7494 · Exploit
• 🔥 https://github.com/betab0t/cve-2017-7494 · Exploit
• 🔥 https://github.com/d3fudd/CVE-2017-7494_SambaCry · Exploit
• 🔥 https://github.com/0xm4ud/noSAMBAnoCRY-CVE-2017-7494 · Exploit
• 🔥❌ https://github.com/elellacode/exploit-CVE-2017-7494 · Exploit, Deleted
• https://osv.dev/vulnerability/DEBIAN-CVE-2016-2123 · Vendor Advisory
• https://zerodayinitiative.com/advisories/ZDI-17-053 · Security Note
• https://cve.org/CVERecord?id=CVE-2016-2123 · Security Note
• https://security-tracker.debian.org/tracker/CVE-2016-2123 · Vendor Advisory
• https://ubuntu.com/security/CVE-2016-2123 · Vendor Advisory
• https://samba.org/samba/security/CVE-2016-2123.html · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2016-2123 · Vendor Advisory