CVE-2013-5018
The is_asn1 function in strongSwan 4.1.11 through 5.0.4 does not properly validate the return...
CVE-2013-5018 is a medium vulnerability (CVSS 4.3) in Strongswan, published August 28, 2013. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 2.99%, the 87th percentile. No source names a fixed version.
- Severity
- 4.3 MediumCVSS 2.0, NVD
- Exploit chance
- 2.99%EPSS, 87th percentile
- Exploitation
- None knownNot on CISA’s or ENISA’s lists
- Fixed in
- No fix listedNo source names one
Description
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.
Exploit likelihood
Affected products
Affected packages
| Package | Affected | Fixed |
|---|---|---|
strongswanopenSUSE:Tumbleweed From an advisory covering 11 CVEs | before 5.3.5-1.1 | 5.3.5-1.1 |
What each source reports
NVD Score used
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.
- Record
CVE-2013-5018- CVSS 2.0
- 4.3 Medium
AV:N/AC:M/Au:N/C:N/I:N/A:P - Weakness
- CWE-119
- Updated
- 2026-11-02
CVE ListNo score
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.
- Record
CVE-2013-5018- Updated
- 2026-11-02
EUVDEUVD-2013-4860No score
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.
- Record
EUVD-2013-4860- Updated
- 2026-11-03
GitHub AdvisoriesGHSA-7xq3-j5px-xf94No score
The is_asn1 function in strongSwan 4.1.11 through 5.0.4 does not properly validate the return...
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.
- Record
GHSA-7xq3-j5px-xf94- Weakness
- CWE-119
- Updated
- 2026-11-02
OSVopenSUSE-SU-2024:10579-1No score
strongswan-5.3.5-1.1 on GA media
These are all security issues fixed in the strongswan-5.3.5-1.1 package on the GA media of openSUSE Tumbleweed.
- Record
openSUSE-SU-2024:10579-1- Updated
- 2026-11-02
OSVSUSE-SU-2015:1227-1No score
Security update for strongswan
This update fixes a NULL ptr dereference (DoS) via ID_DER_ASN1_DN ID payloads.
Security Issue reference:
* CVE-2014-2891
<http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2014-2891>
- Record
SUSE-SU-2015:1227-1- Updated
- 2026-11-02
OSVUBUNTU-CVE-2013-5018No score
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.
- Record
UBUNTU-CVE-2013-5018- Updated
- 2026-11-02
History
| Recorded | Changed | Sources |
|---|---|---|
| affected, facts | ||
| affected | ||
| aliases | EUVD | |
| first indexed | CVE List, GitHub Advisories, NVD, OSV |
Dates are when Every CVE recorded each change. Upstream dates may differ.
References
secunia.com/advisories/54315
securityfocus.com/bid/61564
strongswan.org/blog/2013/08/01/strongswan-5.1.0-released.html
lists.opensuse.org/opensuse-updates/2013-08/msg00022.html
Show 27 moreShow less
lists.strongswan.org/pipermail/users/2013-July/009540.html
nvd.nist.gov/vuln/detail/CVE-2013-5018
github.com/advisories/GHSA-7xq3-j5px-xf94
suse.com/support/update/announcement/2015/suse-su-20151227-1
bugzilla.suse.com/815236
ubuntu.com/security/CVE-2013-5018
cve.org/CVERecord?id=CVE-2013-5018