Description
An exploitable information disclosure vulnerability exists in the network packet handling functionality of Shadowsocks-libev 3.3.2. When utilizing a Stream Cipher, a specially crafted set of network packets can cause an outbound connection from the server, resulting in information disclosure. An attacker can send arbitrary packets to trigger this vulnerability.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| — | Shadowsocks | Shadowsocks-libev 3.3.2 | — |
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 13 | shadowsocks-libev | No fix yet | — |
| Debian 12 | shadowsocks-libev | No fix yet | — |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 26.10 | shadowsocks-libev | No fix yet | — |
| Ubuntu 26.04 LTS | shadowsocks-libev | No fix yet | — |
| Ubuntu 25.10 | shadowsocks-libev | No fix yet | — |
| Ubuntu 24.04 LTS | shadowsocks-libev | No fix yet | — |
| Ubuntu 22.04 LTS | shadowsocks-libev | No fix yet | — |
Show 2 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 20.04 LTS | shadowsocks-libev | No fix yet | — |
| Ubuntu 18.04 LTS | shadowsocks-libev | No fix yet | — |