Buffer overflow in strongSwan and Opensuse - CVE-2013-5018
Published: August 29, 2013 / Updated: August 10, 2020
Vulnerability identifier: #VU42619
CSH Severity: Medium
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U/U:Green
CVE-ID: CVE-2013-5018
CWE-ID: CWE-119
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: strongswan.org
SUSE
SUSE
Affected software:
strongSwan
Opensuse
strongSwan
Opensuse
Detailed vulnerability description
The vulnerability allows a remote non-authenticated attacker to perform service disruption.
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.
How to mitigate CVE-2013-5018
Install update from vendor's website.
Sources
- http://lists.opensuse.org/opensuse-updates/2013-08/msg00021.html
- http://lists.opensuse.org/opensuse-updates/2013-08/msg00022.html
- http://lists.opensuse.org/opensuse-updates/2013-08/msg00050.html
- http://secunia.com/advisories/54315
- http://secunia.com/advisories/54524
- http://strongswan.org/blog/2013/08/01/strongswan-5.1.0-released.html
- http://strongswan.org/blog/2013/08/01/strongswan-denial-of-service-vulnerability-%28cve-2013-5018%29.html
- http://www.securityfocus.com/bid/61564
- https://lists.strongswan.org/pipermail/users/2013-July/009540.html