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Vulnerability Details : CVE-2013-5018

The is_asn1 function in strongSwan 4.1.11 through 5.0.4 does not properly validate the return value of the asn1_length function, which allows remote attackers to cause a denial of service (segmentation fault) via a (1) XAuth username, (2) EAP identity, or (3) PEM encoded file that starts with a 0x04, 0x30, or 0x31 character followed by an ASN.1 length value that triggers an integer overflow.
Publish Date : 2013-08-28 Last Update Date : 2018-10-30
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- CVSS Scores & Vulnerability Types

CVSS Score
Confidentiality Impact None (There is no impact to the confidentiality of the system.)
Integrity Impact None (There is no impact to the integrity of the system)
Availability Impact Partial (There is reduced performance or interruptions in resource availability.)
Access Complexity Medium (The access conditions are somewhat specialized. Some preconditions must be satistified to exploit)
Authentication Not required (Authentication is not required to exploit the vulnerability.)
Gained Access None
Vulnerability Type(s) Denial Of ServiceOverflow
CWE ID 119

- Related OVAL Definitions

Title Definition Id Class Family
SUSE-SU-2013:1866-1 -- Security update for strongswan oval:org.mitre.oval:def:25686 unix
SUSE-SU-2013:1866-2 -- Security update for strongswan oval:org.mitre.oval:def:25663 unix
SUSE-SU-2013:1866-3 -- Security update for strongswan oval:org.mitre.oval:def:25562 unix
OVAL (Open Vulnerability and Assessment Language) definitions define exactly what should be done to verify a vulnerability or a missing patch. Check out the OVAL definitions if you want to learn what you should do to verify a vulnerability.

- Products Affected By CVE-2013-5018

# Product Type Vendor Product Version Update Edition Language
1 OS Opensuse Opensuse 11.4 Version Details Vulnerabilities
2 OS Opensuse Opensuse 12.2 Version Details Vulnerabilities
3 OS Opensuse Opensuse 12.3 Version Details Vulnerabilities
4 Application Strongswan Strongswan 4.1.11 Version Details Vulnerabilities
5 Application Strongswan Strongswan 5.0.0 Version Details Vulnerabilities
6 Application Strongswan Strongswan 5.0.1 Version Details Vulnerabilities
7 Application Strongswan Strongswan 5.0.2 Version Details Vulnerabilities
8 Application Strongswan Strongswan 5.0.3 Version Details Vulnerabilities
9 Application Strongswan Strongswan 5.0.4 Version Details Vulnerabilities

- Number Of Affected Versions By Product

Vendor Product Vulnerable Versions
Opensuse Opensuse 3
Strongswan Strongswan 6

- References For CVE-2013-5018
MLIST [Users] 20130729 [strongSwan] charon crash right after xauth+rsa client connects (strongswan-5.0.4, ubuntu 12.04)
BID 61564 strongSwan 'is_asn1()' Function Denial of Service Vulnerability Release Date:2013-12-27 CONFIRM
SUSE openSUSE-SU-2013:1372 CONFIRM
SUSE openSUSE-SU-2013:1333
SUSE openSUSE-SU-2013:1332

- Metasploit Modules Related To CVE-2013-5018

There are not any metasploit modules related to this CVE entry (Please visit for more information)

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