Add fuzzing, fix integer underflow
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2
.gitignore
vendored
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.gitignore
vendored
@ -2,3 +2,5 @@
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**/*.rs.bk
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.idea
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**/*.kate-swp
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**/out/
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**/core.*
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@ -132,3 +132,5 @@ To build a reverse proxy only, but supporting all of STARTTLS/TLS/QUIC, run: `ca
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#### License
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GNU/AGPLv3 - Check LICENSE.md for details
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Thanks [rxml](https://github.com/horazont/rxml) for afl-fuzz seeds
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588
fuzz/Cargo.lock
generated
Normal file
588
fuzz/Cargo.lock
generated
Normal file
@ -0,0 +1,588 @@
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checksum = "00b0bef5b7f9e0df16536d3961cfb6e84331c065b4066afb39768d0e319411f7"
|
||||
dependencies = [
|
||||
"pest",
|
||||
]
|
||||
|
||||
[[package]]
|
||||
name = "serde"
|
||||
version = "1.0.126"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
checksum = "ec7505abeacaec74ae4778d9d9328fe5a5d04253220a85c4ee022239fc996d03"
|
||||
dependencies = [
|
||||
"serde_derive",
|
||||
]
|
||||
|
||||
[[package]]
|
||||
name = "serde_derive"
|
||||
version = "1.0.126"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
checksum = "963a7dbc9895aeac7ac90e74f34a5d5261828f79df35cbed41e10189d3804d43"
|
||||
dependencies = [
|
||||
"proc-macro2",
|
||||
"quote",
|
||||
"syn",
|
||||
]
|
||||
|
||||
[[package]]
|
||||
name = "sha2"
|
||||
version = "0.9.5"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
checksum = "b362ae5752fd2137731f9fa25fd4d9058af34666ca1966fb969119cc35719f12"
|
||||
dependencies = [
|
||||
"block-buffer",
|
||||
"cfg-if",
|
||||
"cpufeatures",
|
||||
"digest",
|
||||
"opaque-debug",
|
||||
]
|
||||
|
||||
[[package]]
|
||||
name = "sha256"
|
||||
version = "1.0.2"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
checksum = "77f336ed3354742b51d11c47dc0403bf81229548f2e130fcd21ccc471433334a"
|
||||
dependencies = [
|
||||
"hex",
|
||||
"sha2",
|
||||
]
|
||||
|
||||
[[package]]
|
||||
name = "slab"
|
||||
version = "0.4.3"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
checksum = "f173ac3d1a7e3b28003f40de0b5ce7fe2710f9b9dc3fc38664cebee46b3b6527"
|
||||
|
||||
[[package]]
|
||||
name = "strsim"
|
||||
version = "0.8.0"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
checksum = "8ea5119cdb4c55b55d432abb513a0429384878c15dde60cc77b1c99de1a95a6a"
|
||||
|
||||
[[package]]
|
||||
name = "syn"
|
||||
version = "1.0.72"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
checksum = "a1e8cdbefb79a9a5a65e0db8b47b723ee907b7c7f8496c76a1770b5c310bab82"
|
||||
dependencies = [
|
||||
"proc-macro2",
|
||||
"quote",
|
||||
"unicode-xid",
|
||||
]
|
||||
|
||||
[[package]]
|
||||
name = "textwrap"
|
||||
version = "0.11.0"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
checksum = "d326610f408c7a4eb6f51c37c330e496b08506c9457c9d34287ecc38809fb060"
|
||||
dependencies = [
|
||||
"unicode-width",
|
||||
]
|
||||
|
||||
[[package]]
|
||||
name = "tokio"
|
||||
version = "1.5.0"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
checksum = "83f0c8e7c0addab50b663055baf787d0af7f413a46e6e7fb9559a4e4db7137a5"
|
||||
dependencies = [
|
||||
"autocfg",
|
||||
"bytes",
|
||||
"libc",
|
||||
"memchr",
|
||||
"mio",
|
||||
"num_cpus",
|
||||
"pin-project-lite",
|
||||
"tokio-macros",
|
||||
]
|
||||
|
||||
[[package]]
|
||||
name = "tokio-macros"
|
||||
version = "1.1.0"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
checksum = "caf7b11a536f46a809a8a9f0bb4237020f70ecbf115b842360afb127ea2fda57"
|
||||
dependencies = [
|
||||
"proc-macro2",
|
||||
"quote",
|
||||
"syn",
|
||||
]
|
||||
|
||||
[[package]]
|
||||
name = "toml"
|
||||
version = "0.5.8"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
checksum = "a31142970826733df8241ef35dc040ef98c679ab14d7c3e54d827099b3acecaa"
|
||||
dependencies = [
|
||||
"serde",
|
||||
]
|
||||
|
||||
[[package]]
|
||||
name = "typenum"
|
||||
version = "1.13.0"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
checksum = "879f6906492a7cd215bfa4cf595b600146ccfac0c79bcbd1f3000162af5e8b06"
|
||||
|
||||
[[package]]
|
||||
name = "ucd-trie"
|
||||
version = "0.1.3"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
checksum = "56dee185309b50d1f11bfedef0fe6d036842e3fb77413abef29f8f8d1c5d4c1c"
|
||||
|
||||
[[package]]
|
||||
name = "unicode-width"
|
||||
version = "0.1.8"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
checksum = "9337591893a19b88d8d87f2cec1e73fad5cdfd10e5a6f349f498ad6ea2ffb1e3"
|
||||
|
||||
[[package]]
|
||||
name = "unicode-xid"
|
||||
version = "0.2.2"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
checksum = "8ccb82d61f80a663efe1f787a51b16b5a51e3314d6ac365b08639f52387b33f3"
|
||||
|
||||
[[package]]
|
||||
name = "vec_map"
|
||||
version = "0.8.2"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
checksum = "f1bddf1187be692e79c5ffeab891132dfb0f236ed36a43c7ed39f1165ee20191"
|
||||
|
||||
[[package]]
|
||||
name = "version_check"
|
||||
version = "0.9.3"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
checksum = "5fecdca9a5291cc2b8dcf7dc02453fee791a280f3743cb0905f8822ae463b3fe"
|
||||
|
||||
[[package]]
|
||||
name = "winapi"
|
||||
version = "0.3.9"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
checksum = "5c839a674fcd7a98952e593242ea400abe93992746761e38641405d28b00f419"
|
||||
dependencies = [
|
||||
"winapi-i686-pc-windows-gnu",
|
||||
"winapi-x86_64-pc-windows-gnu",
|
||||
]
|
||||
|
||||
[[package]]
|
||||
name = "winapi-i686-pc-windows-gnu"
|
||||
version = "0.4.0"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
checksum = "ac3b87c63620426dd9b991e5ce0329eff545bccbbb34f3be09ff6fb6ab51b7b6"
|
||||
|
||||
[[package]]
|
||||
name = "winapi-x86_64-pc-windows-gnu"
|
||||
version = "0.4.0"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
checksum = "712e227841d057c1ee1cd2fb22fa7e5a5461ae8e48fa2ca79ec42cfc1931183f"
|
||||
|
||||
[[package]]
|
||||
name = "xdg"
|
||||
version = "2.2.0"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
checksum = "d089681aa106a86fade1b0128fb5daf07d5867a509ab036d99988dec80429a57"
|
||||
|
||||
[[package]]
|
||||
name = "xmpp-proxy"
|
||||
version = "1.0.0"
|
||||
dependencies = [
|
||||
"anyhow",
|
||||
"die",
|
||||
"futures",
|
||||
"serde",
|
||||
"serde_derive",
|
||||
"tokio",
|
||||
"toml",
|
||||
]
|
||||
17
fuzz/Cargo.toml
Normal file
17
fuzz/Cargo.toml
Normal file
@ -0,0 +1,17 @@
|
||||
[package]
|
||||
name = "fuzz"
|
||||
version = "0.1.0"
|
||||
authors = ["moparisthebest <admin@moparisthebest.com>"]
|
||||
edition = "2018"
|
||||
|
||||
# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
|
||||
|
||||
[dependencies]
|
||||
afl = "*"
|
||||
xmpp-proxy = { version = "*", default-features = false, features = [] }
|
||||
tokio = { version = "1.4", features = ["net", "rt", "rt-multi-thread", "macros", "io-util"] }
|
||||
sha256 = "1.0.2"
|
||||
rxml = "0.1.0"
|
||||
|
||||
[patch.crates-io]
|
||||
xmpp-proxy = { path = "../" }
|
||||
1
fuzz/in/1.xml
Normal file
1
fuzz/in/1.xml
Normal file
@ -0,0 +1 @@
|
||||
<?xml version='1.0'?>
|
||||
1
fuzz/in/2.xml
Normal file
1
fuzz/in/2.xml
Normal file
@ -0,0 +1 @@
|
||||
<element/>
|
||||
1
fuzz/in/3.xml
Normal file
1
fuzz/in/3.xml
Normal file
@ -0,0 +1 @@
|
||||
<element attr="abc" attr='def'/>
|
||||
1
fuzz/in/4.xml
Normal file
1
fuzz/in/4.xml
Normal file
@ -0,0 +1 @@
|
||||
<element><![CDATA[ fun ]] ]]></element>
|
||||
1
fuzz/in/5.xml
Normal file
1
fuzz/in/5.xml
Normal file
@ -0,0 +1 @@
|
||||
<foo><bar/><baz><fnord/></baz></foo>
|
||||
1
fuzz/in/6.xml
Normal file
1
fuzz/in/6.xml
Normal file
@ -0,0 +1 @@
|
||||
<foo>with <bar/>some<baz>content <fnord/>mixed </baz>into them</foo>
|
||||
5
fuzz/in/7.xml
Normal file
5
fuzz/in/7.xml
Normal file
@ -0,0 +1,5 @@
|
||||
<?xml version='1.0' encoding='utf-8' ?>
|
||||
<foo>
|
||||
<bar>&</bar>
|
||||
<hello xmlns="urn:xmpp"><prefix:world/></hello>
|
||||
</foo>
|
||||
57
fuzz/src/main.rs
Normal file
57
fuzz/src/main.rs
Normal file
@ -0,0 +1,57 @@
|
||||
#[macro_use]
|
||||
extern crate afl;
|
||||
extern crate xmpp_proxy;
|
||||
|
||||
use std::io;
|
||||
use std::io::Cursor;
|
||||
|
||||
use tokio::runtime::Runtime;
|
||||
|
||||
use xmpp_proxy::{StanzaFilter, StanzaReader};
|
||||
|
||||
fn main_gen_test_cases() {
|
||||
fuzz!(|data: &[u8]| {
|
||||
let rt = Runtime::new().unwrap();
|
||||
|
||||
rt.block_on(async {
|
||||
let mut filter = StanzaFilter::new(262_144);
|
||||
let mut stanza_reader = StanzaReader(Cursor::new(data));
|
||||
while let Ok(Some(stanza)) = stanza_reader.next(&mut filter).await {
|
||||
use rxml::EventRead;
|
||||
let mut fp = rxml::FeedParser::new();
|
||||
let stanza_vec = &stanza.to_vec();
|
||||
fp.feed(stanza_vec);
|
||||
fp.feed_eof();
|
||||
let result = fp.read_all_eof(|_ev| {
|
||||
//println!("got event: {:?}", ev);
|
||||
});
|
||||
// true indicates eof
|
||||
if let Ok(result) = result {
|
||||
if result {
|
||||
// wow, afl generated us valid XML, lets output it as a test case
|
||||
let fname = sha256::digest_bytes(&stanza);
|
||||
std::fs::create_dir_all("/tmp/afl_test_gen/").unwrap();
|
||||
std::fs::write("/tmp/afl_test_gen/".to_owned() + &fname, &stanza).unwrap();
|
||||
} else {
|
||||
// more data is required, stanzafilter should never let this happen, let's panic
|
||||
panic!("more data required?");
|
||||
}
|
||||
}
|
||||
}
|
||||
})
|
||||
});
|
||||
}
|
||||
|
||||
fn main() {
|
||||
fuzz!(|data: &[u8]| {
|
||||
let rt = Runtime::new().unwrap();
|
||||
|
||||
rt.block_on(async {
|
||||
let mut filter = StanzaFilter::new(262_144);
|
||||
let mut stanza_reader = StanzaReader(Cursor::new(data));
|
||||
while let Ok(Some(_stanza)) = stanza_reader.next(&mut filter).await {
|
||||
//ret.push(to_str(stanza).to_string());
|
||||
}
|
||||
})
|
||||
});
|
||||
}
|
||||
72
fuzz/xml.dict
Normal file
72
fuzz/xml.dict
Normal file
@ -0,0 +1,72 @@
|
||||
#
|
||||
# AFL dictionary for XML
|
||||
# ----------------------
|
||||
#
|
||||
# Several basic syntax elements and attributes, modeled on libxml2.
|
||||
#
|
||||
# Created by Michal Zalewski <lcamtuf@google.com>
|
||||
#
|
||||
|
||||
attr_encoding=" encoding=\"1\""
|
||||
attr_generic=" a=\"1\""
|
||||
attr_href=" href=\"1\""
|
||||
attr_standalone=" standalone=\"no\""
|
||||
attr_version=" version=\"1\""
|
||||
attr_xml_base=" xml:base=\"1\""
|
||||
attr_xml_id=" xml:id=\"1\""
|
||||
attr_xml_lang=" xml:lang=\"1\""
|
||||
attr_xml_space=" xml:space=\"1\""
|
||||
attr_xmlns=" xmlns=\"1\""
|
||||
|
||||
entity_builtin="<"
|
||||
entity_decimal=""
|
||||
entity_external="&a;"
|
||||
entity_hex=""
|
||||
|
||||
string_any="ANY"
|
||||
string_brackets="[]"
|
||||
string_cdata="CDATA"
|
||||
string_col_fallback=":fallback"
|
||||
string_col_generic=":a"
|
||||
string_col_include=":include"
|
||||
string_dashes="--"
|
||||
string_empty="EMPTY"
|
||||
string_empty_dblquotes="\"\""
|
||||
string_empty_quotes="''"
|
||||
string_entities="ENTITIES"
|
||||
string_entity="ENTITY"
|
||||
string_fixed="#FIXED"
|
||||
string_id="ID"
|
||||
string_idref="IDREF"
|
||||
string_idrefs="IDREFS"
|
||||
string_implied="#IMPLIED"
|
||||
string_nmtoken="NMTOKEN"
|
||||
string_nmtokens="NMTOKENS"
|
||||
string_notation="NOTATION"
|
||||
string_parentheses="()"
|
||||
string_pcdata="#PCDATA"
|
||||
string_percent="%a"
|
||||
string_public="PUBLIC"
|
||||
string_required="#REQUIRED"
|
||||
string_schema=":schema"
|
||||
string_system="SYSTEM"
|
||||
string_ucs4="UCS-4"
|
||||
string_utf16="UTF-16"
|
||||
string_utf8="UTF-8"
|
||||
string_xmlns="xmlns:"
|
||||
|
||||
tag_attlist="<!ATTLIST"
|
||||
tag_cdata="<![CDATA["
|
||||
tag_close="</a>"
|
||||
tag_doctype="<!DOCTYPE"
|
||||
tag_element="<!ELEMENT"
|
||||
tag_entity="<!ENTITY"
|
||||
tag_ignore="<![IGNORE["
|
||||
tag_include="<![INCLUDE["
|
||||
tag_notation="<!NOTATION"
|
||||
tag_open="<a>"
|
||||
tag_open_close="<a />"
|
||||
tag_open_exclamation="<!"
|
||||
tag_open_q="<?"
|
||||
tag_sq2_close="]]>"
|
||||
tag_xml_q="<?xml?>"
|
||||
6
src/lib.rs
Normal file
6
src/lib.rs
Normal file
@ -0,0 +1,6 @@
|
||||
mod stanzafilter;
|
||||
pub use stanzafilter::*;
|
||||
|
||||
pub fn to_str(buf: &[u8]) -> std::borrow::Cow<'_, str> {
|
||||
String::from_utf8_lossy(buf)
|
||||
}
|
||||
@ -30,6 +30,8 @@ use slicesubsequence::*;
|
||||
mod stanzafilter;
|
||||
use stanzafilter::*;
|
||||
|
||||
use xmpp_proxy::to_str;
|
||||
|
||||
#[cfg(feature = "quic")]
|
||||
mod quic;
|
||||
#[cfg(feature = "quic")]
|
||||
@ -136,10 +138,6 @@ pub enum AllowedType {
|
||||
Any,
|
||||
}
|
||||
|
||||
fn to_str(buf: &[u8]) -> std::borrow::Cow<'_, str> {
|
||||
String::from_utf8_lossy(buf)
|
||||
}
|
||||
|
||||
async fn shuffle_rd_wr<R: AsyncRead + Unpin, W: AsyncWrite + Unpin>(
|
||||
in_rd: R,
|
||||
in_wr: W,
|
||||
|
||||
@ -26,6 +26,16 @@ pub struct StanzaFilter {
|
||||
state: StanzaState,
|
||||
}
|
||||
|
||||
#[inline(always)]
|
||||
fn checked_sub(i: usize, s: usize) -> Result<usize> {
|
||||
// i.checked_sub(s).ok_or_else(||anyhow::anyhow!("invalid stanza"))
|
||||
if s > i {
|
||||
bail!("invalid stanza")
|
||||
} else {
|
||||
Ok(i - s)
|
||||
}
|
||||
}
|
||||
|
||||
impl StanzaFilter {
|
||||
pub fn new(buf_size: usize) -> StanzaFilter {
|
||||
StanzaFilter {
|
||||
@ -77,7 +87,7 @@ impl StanzaFilter {
|
||||
_ => self.state = InsideTag,
|
||||
},
|
||||
InsideTagFirstChar => match b {
|
||||
b'/' => self.tag_cnt -= 2,
|
||||
b'/' => self.tag_cnt = checked_sub(self.tag_cnt, 2)?,
|
||||
b'!' => self.state = ExclamationTag(self.cnt + 7), // 7 is length of b"[CDATA["
|
||||
b'?' | b'>' | b'\'' | b'"' => bail!("illegal stanza: {}", to_str(&self.buf[..(self.cnt + 1)])),
|
||||
_ => self.state = InsideTag,
|
||||
@ -87,7 +97,7 @@ impl StanzaFilter {
|
||||
if self.buf[self.cnt - 1] == b'/' {
|
||||
// state can't be InsideTag unless we are on at least the second character, so can't go out of range
|
||||
// self-closing tag
|
||||
self.tag_cnt -= 1;
|
||||
self.tag_cnt = checked_sub(self.tag_cnt, 1)?;
|
||||
}
|
||||
if self.tag_cnt == 0 {
|
||||
return self.stanza_end();
|
||||
@ -124,7 +134,7 @@ impl StanzaFilter {
|
||||
if idx == self.cnt {
|
||||
if self.last_equals(b"[CDATA[")? {
|
||||
self.state = InsideCDATA;
|
||||
self.tag_cnt -= 1; // cdata not a tag
|
||||
self.tag_cnt = checked_sub(self.tag_cnt, 1)?; // cdata not a tag
|
||||
} else {
|
||||
bail!("illegal stanza: {}", to_str(&self.buf[..(self.cnt + 1)]));
|
||||
}
|
||||
|
||||
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Block a user