Description
nginx 0.5.6 through 1.7.4, when using the same shared ssl_session_cache or ssl_session_ticket_key for multiple servers, can reuse a cached SSL session for an unrelated context, which allows remote attackers with certain privileges to conduct "virtual host confusion" attacks.
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | nginx | 1.6.2-1 | — |
| Debian 13 | nginx | 1.6.2-1 | — |
| Debian 12 | nginx | 1.6.2-1 | — |
| Debian 7 | nginx | 1.2.1-2.2+wheezy3 | DSA-3029-1 |
| Debian 6.0 | nginx | 0.7.67-3+squeeze4 | DLA-55-1 |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 14.04 LTS | nginx | 1.4.6-1ubuntu3.1 | USN-2351-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | nginx | 1.11.4-2.5 | openSUSE-SU-2024:10044-1 |
Advisories 4
- DLA-55-1 nginx - security update Debian Security (DSA / DLA) · Mar 9, 2026
- DSA-3029-1 nginx - security update Debian Security (DSA / DLA) · Mar 9, 2026
- USN-2351-1 nginx vulnerability Ubuntu Security Notices (USN) · Feb 10, 2026
- openSUSE-SU-2024:10044-1 nginx-1.11.4-2.5 on GA media SUSE / openSUSE Security Updates · Feb 4, 2026
References
- [nginx-announce] 20140916 nginx security advisory (CVE-2014-3616) mailing-list
- DSA-3029 vendor-advisory