CVE-2017-7521: openvpn technologies, inc openvpn Uncontrolled Resource Consumption
CVSS: 5.9v3.0MediumModified
AliasesUBUNTU-CVE-2017-7521DEBIAN-CVE-2017-7521
Published 27-06-2017Last modified 05-08-2024
Vulnerability summary
CVE-2017-7521 is a medium (CVSS 5.9) Uncontrolled Resource Consumption vulnerability in openvpn technologies, inc openvpn. EPSS estimates a 3.85% chance of exploitation in the next 30 days, higher than 90% of scored vulnerabilities.
CVSS score
5.9/10
010
Medium · v3.0 (NVD)EPSS score
3.85%
0%100%
Low · 0.00 pp in 30 daysKEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded
Advisory lineage
Upstream 0 · Downstream 6 · Related 4Timeline
- 27-06-2017PublishedVulnerability first disclosed.
- 05-08-2024Last modifiedVulnerability information updated.
Description
OpenVPN versions before 2.4.3 and before 2.3.17 are vulnerable to remote denial-of-service due to memory exhaustion caused by memory leaks and double-free issue in extract_x509_extension().
CVSS metrics
4 scores · 3 sources · 2 versionsMedium 5.9Preferred score · NVD (NIST)
CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:HSourcesAll 3 agree
- OSV · UbuntuEcosystem advisory · calculated5.9MediumCVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
- OSV · DebianEcosystem advisory · calculated5.9MediumCVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
Medium 4.3Preferred score · NVD (NIST)
AV:N/AC:M/Au:N/C:N/I:N/A:PSourcesSingle source
EPSS trend
Probability
3.85%
Chance of exploitation in the next 30 days
Percentile
90%
Versus all other CVEs
30-day change
0.00 pp
From 3.85% on 20-09-2026
20-09-202620-10-2026
EPSS score3.85%
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root cause- CWE-400Uncontrolled Resource ConsumptionThe product does not properly control the allocation and maintenance of a limited resource.
- CWE-415Double FreeThe product calls free() twice on the same memory address.
- CWE-772Missing Release of Resource after Effective LifetimeThe product does not release a resource after its effective lifetime has ended, i.e., after the resource is no longer needed.
Affected systems
Debian1 product
- openvpn< 2.4.3-1
Openvpn1 product
- openvpnEOL≤ 2.3.16 | 2.4.0 | 2.4.0:alpha2 | 2.4.0:beta1 | 2.4.0:beta2 | 2.4.0:rc1 | 2.4.0:rc2 | 2.4.1 | 2.4.2
Openvpn technologies, inc1 product
- openvpn< 2.4.3 | < 2.3.17
Ubuntu1 product
- openvpn< 2.3.2-7ubuntu3.2 | < 2.3.10-1ubuntu2.1
4 vendors · 4 products
References
9 links- community.openvpn.net/openvpn/wiki/VulnerabilitiesFixedInOpenVPN243X Refsource CONFIRMVendor AdvisoryREPORT
