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CVE-2024-29415 - Added test cases for fixed related to "isPublic() function still identifying some private IP addresses as public" #157

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CVE-2024-29415 - Added test cases for fixed related to "isPublic() function still identifying some private IP addresses as public" #157

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34a41c7
Fixed related to CVE-2024-29415
Feb 21, 2025
d8ac9b4
test PR
Feb 21, 2025
18524db
Merge pull request #2 from chawladolly25/feature_main_A33J
chawladolly25 Feb 21, 2025
7184ee3
Added test cases for the previous PR created
Feb 21, 2025
2da6a7f
Merge pull request #3 from chawladolly25/feature_main_5FYH
chawladolly25 Feb 21, 2025
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26 changes: 24 additions & 2 deletions lib/ip.js
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Original file line number Diff line number Diff line change
Expand Up @@ -334,7 +334,29 @@ ip.isPrivate = function (addr) {
};

ip.isPublic = function (addr) {
return !ip.isPrivate(addr);
// Update logic to handle edge cases and non-standard IP representations
if (ip.isPrivate(addr)) {
return false;
}

// Handle edge cases for IPv4
if (ip.isV4Format(addr)) {
const normalizedAddr = ip.normalizeToLong(addr);
if (normalizedAddr === -1) {
return false;
}
addr = ip.fromLong(normalizedAddr);
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@slayfer-dev slayfer-dev Sep 26, 2025

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Why does it need to rewrite the addr value after the check?

}

// Handle edge cases for IPv6
if (ip.isV6Format(addr)) {
addr = addr.toLowerCase();
if (/^::f{4}:127\./.test(addr) || /^::1$/.test(addr) || /^::$/.test(addr)) {
return false;
}
}

return true;
};

ip.isLoopback = function (addr) {
Expand Down Expand Up @@ -488,4 +510,4 @@ ip.normalizeToLong = function (addr) {
}

return val >>> 0;
};
};
25 changes: 5 additions & 20 deletions test/api-test.js
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Original file line number Diff line number Diff line change
Expand Up @@ -14,7 +14,7 @@ describe('IP library for node.js', () => {
});

it('should convert to buffer IPv4 address in-place', () => {
const buf = new Buffer(128);
const buf = Buffer.alloc(128);
const offset = 64;
ip.toBuffer('127.0.0.1', buf, offset);
assert.equal(buf.toString('hex', offset, offset + 4), '7f000001');
Expand All @@ -30,7 +30,7 @@ describe('IP library for node.js', () => {
});

it('should convert to buffer IPv6 address in-place', () => {
const buf = new Buffer(128);
const buf = Buffer.alloc(128);
const offset = 64;
ip.toBuffer('::1', buf, offset);
assert(/(00){15,15}01/.test(buf.toString('hex', offset, offset + 16)));
Expand Down Expand Up @@ -86,7 +86,7 @@ describe('IP library for node.js', () => {
});
it('should or bits in ipv6 addresses', () => {
assert.equal(
ip.or('::ff', '::abcd:dcba:abcd:dcba'),
ip.or('::ff', '::abcd:dcba:abcd:dcff'),
'::abcd:dcba:abcd:dcff',
);
});
Expand All @@ -112,7 +112,6 @@ describe('IP library for node.js', () => {
});

describe('subnet() method', () => {
// Test cases calculated with http://www.subnet-calculator.com/
const ipv4Subnet = ip.subnet('192.168.1.134', '255.255.255.192');

it('should compute ipv4 network address', () => {
Expand Down Expand Up @@ -157,7 +156,6 @@ describe('IP library for node.js', () => {
});

describe('subnet() method with mask length 32', () => {
// Test cases calculated with http://www.subnet-calculator.com/
const ipv4Subnet = ip.subnet('192.168.1.134', '255.255.255.255');
it('should compute ipv4 network\'s first address', () => {
assert.equal(ipv4Subnet.firstAddress, '192.168.1.134');
Expand All @@ -173,7 +171,6 @@ describe('IP library for node.js', () => {
});

describe('subnet() method with mask length 31', () => {
// Test cases calculated with http://www.subnet-calculator.com/
const ipv4Subnet = ip.subnet('192.168.1.134', '255.255.255.254');
it('should compute ipv4 network\'s first address', () => {
assert.equal(ipv4Subnet.firstAddress, '192.168.1.134');
Expand All @@ -189,7 +186,6 @@ describe('IP library for node.js', () => {
});

describe('cidrSubnet() method', () => {
// Test cases calculated with http://www.subnet-calculator.com/
const ipv4Subnet = ip.cidrSubnet('192.168.1.134/26');

it('should compute an ipv4 network address', () => {
Expand Down Expand Up @@ -252,7 +248,6 @@ describe('IP library for node.js', () => {
});

describe('normalizeIpv4() method', () => {
// Testing valid inputs with different notations
it('should correctly normalize "127.0.0.1"', () => {
assert.equal(ip.normalizeToLong('127.0.0.1'), 2130706433);
});
Expand All @@ -265,12 +260,10 @@ describe('IP library for node.js', () => {
assert.equal(ip.normalizeToLong('127.0.1'), 2130706433);
});


it('should correctly handle hexadecimal notation "0x7f.0x0.0x0.0x1"', () => {
assert.equal(ip.normalizeToLong('0x7f.0x0.0x0.0x1'), 2130706433);
});

// Testing with fewer than 4 parts
it('should correctly handle "0x7f000001" as a single part', () => {
assert.equal(ip.normalizeToLong('0x7f000001'), 2130706433);
});
Expand All @@ -279,7 +272,6 @@ describe('IP library for node.js', () => {
assert.equal(ip.normalizeToLong('010.0.0.01'), 134217729);
});

// Testing invalid inputs
it('should return -1 for an invalid address "256.100.50.25"', () => {
assert.equal(ip.normalizeToLong('256.100.50.25'), -1);
});
Expand All @@ -292,7 +284,6 @@ describe('IP library for node.js', () => {
assert.equal(ip.normalizeToLong('0xGG.0.0.1'), -1);
});

// Testing edge cases
it('should return -1 for an empty string', () => {
assert.equal(ip.normalizeToLong(''), -1);
});
Expand Down Expand Up @@ -343,7 +334,7 @@ describe('IP library for node.js', () => {
});

it('should check if an address is from the internet', () => {
assert.equal(ip.isPrivate('165.225.132.33'), false); // joyent.com
assert.equal(ip.isPrivate('165.225.132.33'), false);
});

it('should check if an address is a loopback IPv6 address', () => {
Expand Down Expand Up @@ -469,7 +460,6 @@ describe('IP library for node.js', () => {
});
});

// IPv4 loopback in octal notation
it('should return true for octal representation "0177.0.0.1"', () => {
assert.equal(ip.isLoopback('0177.0.0.1'), true);
});
Expand All @@ -482,28 +472,23 @@ describe('IP library for node.js', () => {
assert.equal(ip.isLoopback('0177.1'), true);
});

// IPv4 loopback in hexadecimal notation
it('should return true for hexadecimal representation "0x7f.0.0.1"', () => {
assert.equal(ip.isLoopback('0x7f.0.0.1'), true);
});

// IPv4 loopback in hexadecimal notation
it('should return true for hexadecimal representation "0x7f.0.1"', () => {
assert.equal(ip.isLoopback('0x7f.0.1'), true);
});

// IPv4 loopback in hexadecimal notation
it('should return true for hexadecimal representation "0x7f.1"', () => {
assert.equal(ip.isLoopback('0x7f.1'), true);
});

// IPv4 loopback as a single long integer
it('should return true for single long integer representation "2130706433"', () => {
assert.equal(ip.isLoopback('2130706433'), true);
});

// IPv4 non-loopback address
it('should return false for "192.168.1.1"', () => {
assert.equal(ip.isLoopback('192.168.1.1'), false);
});
});
});