In manager.c in ss-manager in shadowsocks-libev 3.1.0, improper parsing allows command injection via shell metacharacters in a JSON configuration request received via 127.0.0.1 UDP traffic, related to the addserver, buildconfig, and constructcommandline functions.
{
"availability": "No subscription required",
"binaries": [
{
"binary_version": "3.1.3+ds-1ubuntu2",
"binary_name": "libshadowsocks-libev-dev"
},
{
"binary_version": "3.1.3+ds-1ubuntu2",
"binary_name": "libshadowsocks-libev2"
},
{
"binary_version": "3.1.3+ds-1ubuntu2",
"binary_name": "libshadowsocks-libev2-dbgsym"
},
{
"binary_version": "3.1.3+ds-1ubuntu2",
"binary_name": "shadowsocks-libev"
},
{
"binary_version": "3.1.3+ds-1ubuntu2",
"binary_name": "shadowsocks-libev-dbgsym"
}
]
}