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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 : 2013-08-29
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- CVSS Scores & Vulnerability Types

CVSS Score
4.3
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

- Products Affected By CVE-2013-5018

# Product Type Vendor Product Version Update Edition Language
1 OS Novell Opensuse 11.4 Version Details Vulnerabilities
2 OS Novell Opensuse 12.2 Version Details Vulnerabilities
3 OS Novell 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
Novell Opensuse 3
Strongswan Strongswan 6

- References For CVE-2013-5018

http://lists.opensuse.org/opensuse-updates/2013-08/msg00021.html
SUSE openSUSE-SU-2013:1332
http://lists.opensuse.org/opensuse-updates/2013-08/msg00022.html
SUSE openSUSE-SU-2013:1333
http://secunia.com/advisories/54315
SECUNIA 54315
http://lists.opensuse.org/opensuse-updates/2013-08/msg00050.html
SUSE openSUSE-SU-2013:1372
https://lists.strongswan.org/pipermail/users/2013-July/009540.html
MLIST [Users] 20130729 [strongSwan] charon crash right after xauth+rsa client connects (strongswan-5.0.4, ubuntu 12.04)
http://secunia.com/advisories/54524
SECUNIA 54524
http://strongswan.org/blog/2013/08/01/strongswan-5.1.0-released.html CONFIRM
http://strongswan.org/blog/2013/08/01/strongswan-denial-of-service-vulnerability-%28cve-2013-5018%29.html CONFIRM

- Metasploit Modules Related To CVE-2013-5018

There are not any metasploit modules related to this vulnerability (Please visit www.metasploit.com for more information)


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