Debian update for samba



Published: 2018-08-14
Risk High
Patch available YES
Number of vulnerabilities 2
CVE-ID CVE-2018-10858
CVE-2018-10919
CWE-ID CWE-122
CWE-284
Exploitation vector Network
Public exploit N/A
Vulnerable software
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Operating systems & Components / Operating system

Vendor Debian

Security Bulletin

This security bulletin contains information about 2 vulnerabilities.

1) Heap-based buffer overflow

EUVDB-ID: #VU14333

Risk: High

CVSSv3.1: 7.7 [CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2018-10858

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

Exploit availability: No

Description

The vulnerability allows a remote attacker to execute arbitrary code on the target system.

The vulnerability exists due to a boundary error in libsmbclientwhen processing a list of directory entries, received from the server. A remote attacker can trick the victim to connect to a malicious SMB server, send a long list of directory entries, trigger heap-based buffer overflow and crash the client or execute arbitrary code on the target system.

Mitigation

Update the affected package to version: 2:4.5.12+dfsg-2+deb9u3.

Vulnerable software versions

Debian Linux: All versions

External links

http://www.debian.org/security/2018/dsa-4271


Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

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

2) Information disclosure

EUVDB-ID: #VU14335

Risk: Low

CVSSv3.1: 5 [CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2018-10919

CWE-ID: CWE-284 - Improper Access Control

Exploit availability: No

Description

The vulnerability allows a remote attacker to gain access to sensitive information.
The vulnerability exists due to missing access control checks when displaying values of confidential attributes. A remote authenticated attacker can use LDAP search expression to  obtain both of attributes where the schema SEARCH_FLAG_CONFIDENTIAL (0x80) searchFlags bit and where an explicit Access Control Entry has been specified on the ntSecurityDescriptor.

Mitigation

Update the affected package to version: 2:4.5.12+dfsg-2+deb9u3.

Vulnerable software versions

Debian Linux: All versions

External links

http://www.debian.org/security/2018/dsa-4271


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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