SB2018050402 - Slackware Linux update for python
Published: May 4, 2018
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 8 secuirty vulnerabilities.
1) Resource management error (CVE-ID: CVE-2012-0876)
The vulnerability allows a remote non-authenticated attacker to perform service disruption.
The XML parser (xmlparse.c) in expat before 2.1.0 computes hash values without restricting the ability to trigger hash collisions predictably, which allows context-dependent attackers to cause a denial of service (CPU consumption) via an XML file with many identifiers with the same value.
2) Buffer overflow in Tenable Nessus (CVE-ID: CVE-2016-0718)
The vulnerability allows a remote attacker to execute arbitrary code on the target system.The vulnerability exists due to boundary error when handling malformed input documents. A remote unauthenticated attacker can trigger a buffer overflow in the Expat XML parser library and execute arbitrary code by sending specially crafted data to vulnerable server.
Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.
3) XXE attack (CVE-ID: CVE-2016-4472)
The vulnerability allows a remote attacker to cause DoS condition on the target system.The weakness exists due to the overflow protection in Expat is removed by compilers with certain optimization settings. A remote attacker can supply specially crafted XML data and cause the service to crash.
The vulnerability exists due to incomplete fix for CVE-2015-1283 and CVE-2015-2716.
4) Input validation error (CVE-ID: CVE-2016-5300)
The vulnerability allows context-dependent attackers to perform a denial of service (DoS) attack.
The vulnerability exists due to insufficient validation of user-supplied input. A remote attacker can cause a denial of service (CPU consumption) via crafted identifiers in an XML document.
5) Integer overflow (CVE-ID: CVE-2016-9063)
The vulnerability allows a remote attacker to cause DoS condition on the target system.The weakness exists due to an integer overflow when handling malicious XML files. A remote attacker can send manipulated XML content, trick the victim into opening it and cause the application using the Expat library to crash.
Successful exploitation of the vulnerability results in denial of service.
6) Improper Restriction of XML External Entity Reference (CVE-ID: CVE-2017-9233)
The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.The vulnerability exists due to an error within entityValueInitProcessor() function while parsing malformed XML in an external entity. An attacker can take advantage of this flaw to cause a denial of service against an application using the Expat library.
Successful exploitation of the vulnerability may allow an attacker to perform a denial of service attack.
7) Improper input validation (CVE-ID: CVE-2018-1060)
The vulnerability allows a remote attacker to cause DoS condition on he target system.The weakness exists due to the way catastrophic backtracking was implemented in apop() method in pop3lib. A remote attacker can cause the service to crash.
8) Improper input validation (CVE-ID: CVE-2018-1061)
The vulnerability allows a remote attacker to cause DoS condition on he target system.The weakness exists due to the way catastrophic backtracking was implemented in python's difflib.IS_LINE_JUNK method difflib. A remote attacker can cause the service to crash.
Remediation
Install update from vendor's website.