Executive Summary



This Alert is flagged as TOP 25 Common Weakness Enumeration from CWE/SANS. For more information, you can read this.
Summary
Title Cyrus SASL vulnerability
Informations
Name USN-4256-1 First vendor Publication 2020-01-28
Vendor Ubuntu Last vendor Modification 2020-01-28
Severity (Vendor) N/A Revision N/A

Security-Database Scoring CVSS v3

Cvss vector : CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Overall CVSS Score 7.5
Base Score 7.5 Environmental Score 7.5
impact SubScore 3.6 Temporal Score 7.5
Exploitabality Sub Score 3.9
 
Attack Vector Network Attack Complexity Low
Privileges Required None User Interaction None
Scope Unchanged Confidentiality Impact None
Integrity Impact None Availability Impact High
Calculate full CVSS 3.0 Vectors scores

Security-Database Scoring CVSS v2

Cvss vector : (AV:N/AC:L/Au:N/C:N/I:N/A:P)
Cvss Base Score 5 Attack Range Network
Cvss Impact Score 2.9 Attack Complexity Low
Cvss Expoit Score 10 Authentication None Required
Calculate full CVSS 2.0 Vectors scores

Detail

A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 19.10 - Ubuntu 18.04 LTS - Ubuntu 16.04 LTS - Ubuntu 14.04 ESM - Ubuntu 12.04 ESM

Summary:

Cyrus SASL could be made to crash or execute arbitrary code if it received a specially crafted LDAP packet.

Software Description: - cyrus-sasl2: Cyrus Simple Authentication and Security Layer

Details:

It was discovered that Cyrus SASL incorrectly handled certain LDAP packets. An attacker could possibly use this issue to execute arbitrary code or cause a denial of service.

Update instructions:

The problem can be corrected by updating your system to the following package versions:

Ubuntu 19.10:
libsasl2-2 2.1.27+dfsg-1ubuntu0.1

Ubuntu 18.04 LTS:
libsasl2-2 2.1.27~101-g0780600+dfsg-3ubuntu2.1

Ubuntu 16.04 LTS:
libsasl2-2 2.1.26.dfsg1-14ubuntu0.2

Ubuntu 14.04 ESM:
libsasl2-2 2.1.25.dfsg1-17ubuntu0.1~esm1

Ubuntu 12.04 ESM:
libsasl2-2 2.1.25.dfsg1-3ubuntu0.2

After a standard system update you need to restart services using SASL to effect the necessary changes.

References:
https://usn.ubuntu.com/4256-1
CVE-2019-19906

Package Information:
https://launchpad.net/ubuntu/+source/cyrus-sasl2/2.1.27+dfsg-1ubuntu0.1
https://launchpad.net/ubuntu/+source/cyrus-sasl2/2.1.27~101-g0780600+dfsg-3ubuntu2.1
https://launchpad.net/ubuntu/+source/cyrus-sasl2/2.1.26.dfsg1-14ubuntu0.2

Original Source

Url : http://www.ubuntu.com/usn/USN-4256-1

CWE : Common Weakness Enumeration

% Id Name
50 % CWE-787 Out-of-bounds Write (CWE/SANS Top 25)
50 % CWE-193 Off-by-one Error

CPE : Common Platform Enumeration

TypeDescriptionCount
Application 2
Application 2
Application 1
Os 1
Os 1
Os 189
Os 5
Os 3
Os 2
Os 4
Os 1
Os 1
Os 1
Os 1
Os 1
Os 1
Os 1
Os 1
Os 1

Alert History

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0
1
Date Informations
2020-05-23 13:03:46
  • Multiple Updates
2020-01-28 17:18:59
  • First insertion