| Name | CVE-2017-7521 |
| 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(). |
| Source | CVE (at NVD; CERT, LWN, oss-sec, fulldisc, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more) |
| References | DSA-3900-1 |
| Debian Bugs | 865480 |
Vulnerable and fixed packages
The table below lists information on source packages.
| Source Package | Release | Version | Status |
|---|
| openvpn (PTS) | jessie, jessie (lts) | 2.3.4-5+deb8u3 | fixed |
| stretch (security), stretch (lts), stretch | 2.4.0-6+deb9u4 | fixed |
| buster | 2.4.7-1+deb10u1 | fixed |
| bullseye | 2.5.1-3 | fixed |
| bookworm (security), bookworm | 2.6.3-1+deb12u2 | fixed |
| sid, trixie | 2.6.12-1 | fixed |
The information below is based on the following data on fixed versions.
Notes
[wheezy] - openvpn <not-affected> (Vulnerable code not present)
Fixed by (master): https://github.com/OpenVPN/openvpn/commit/2d032c7fcdfd692c851ea2fa858b4c2d9ea7d52d
Fixed by (master): https://github.com/OpenVPN/openvpn/commit/cb4e35ece4a5b70b10ef9013be3bff263d82f32b
Fixed by (2.4.x): https://github.com/OpenVPN/openvpn/commit/2341f716198fa90193e040b3fdb16959a47c6c27
Fixed by (2.4.x): https://github.com/OpenVPN/openvpn/commit/040084067119dd5a9e15eb3bcfc0079debaa3777
Fixed by (2.3.x): https://github.com/OpenVPN/openvpn/commit/84e1775961de1c9d2ab32159fc03f758591f5238
Fixed by (2.3.x): https://github.com/OpenVPN/openvpn/commit/1dde0cd6e5e6a0f2f45ec9969b7ff1b6537514ad
https://community.openvpn.net/openvpn/wiki/VulnerabilitiesFixedInOpenVPN243
https://www.openwall.com/lists/oss-security/2017/06/21/6