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Refuse long labels

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Frank Denis 2019-12-23 20:57:09 +01:00
parent 4e4ddcf8e5
commit 31953b2605
1 changed files with 1 additions and 0 deletions
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src/dns.rs
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@ -63,6 +63,7 @@ fn skip_name(packet: &[u8], offset: usize) -> Result<usize, Error> {
} }
label_len => label_len, label_len => label_len,
} as usize; } as usize;
ensure!(label_len < 0x40, "Long label");
ensure!( ensure!(
packet_len - offset - 1 > label_len, packet_len - offset - 1 > label_len,
"Malformed packet with an out-of-bounds name" "Malformed packet with an out-of-bounds name"