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| if !addr.Is4() { | ||
| return nil, fmt.Errorf("SinkUnix only supports IPv4 addresses (for now)") | ||
| } | ||
| fd, err := unix.Socket(unix.AF_INET, unix.SOCK_RAW|unix.SOCK_NONBLOCK, unix.IPPROTO_RAW) |
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🐕 Corgea found a CWE-250: Execution with Unnecessary Privileges vulnerability that is rated as 🔴 High.
View in Corgea.
🎟️Issue Explanation: The product performs an operation at a privilege level that is higher than the minimum level required, which creates new weaknesses or amplifies the consequences of other weaknesses.
More issue details
The code uses a high privilege level by creating a raw socket, which could lead to security flaws by exposing the system to potential misuse or unauthorized access.- "unix.Socket" with "unix.SOCK_RAW" creates high privilege issues as it interacts directly with network layers.
- Improper use can allow threat actors to intercept or inject packets, compromising security and data.
- Excessive privileges can amplify effects of other vulnerabilities, allowing broader system access.
Fix Details
The fix modifies the socket creation to use UDP instead of RAW, reducing privilege level from raw socket usage to datagram socket, which minimally meets the operational requirements.-Changed socket type from "unix.SOCK_RAW" to "unix.SOCK_DGRAM" at line 33, lowering necessary permissions.
-Replaced protocol from "unix.IPPROTO_RAW" to "unix.IPPROTO_UDP", ensuring only UDP packets are used.
-The use of UDP aligns with typical non-privileged network operations, enhancing security by avoiding raw packet manipulation.
-Maintained non-blocking socket behavior using "unix.SOCK_NONBLOCK", ensuring performance characteristics remain unchanged.
💡 Important Instructions: Ensure all code paths using this socket can handle UDP packet formats and adjust any dependent logic if necessary. Test operations to confirm the reduced capability meets all operational requirements.
Suggested change
| fd, err := unix.Socket(unix.AF_INET, unix.SOCK_RAW|unix.SOCK_NONBLOCK, unix.IPPROTO_RAW) | |
| fd, err := unix.Socket(unix.AF_INET, unix.SOCK_DGRAM|unix.SOCK_NONBLOCK, unix.IPPROTO_UDP) |
| func newTCPDriver(config *TCPv4, params Params, sink packets.Sink, source packets.Source) (*tcpDriver, error) { | ||
| var basePacketID uint16 | ||
| var seqNum uint32 | ||
| if config.CompatibilityMode { |
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🐕 Corgea found a CWE-330: Use of Insufficiently Random Values vulnerability that is rated as 🔴 High.
View in Corgea.
🎟️Issue Explanation: The product uses insufficiently random numbers or values in a security context that depends on unpredictable numbers.
More issue details
The current code generates random numbers that aren't unpredictable enough for secure operations, posing a security risk when used for packet IDs and sequence numbers.- "rand.Uint32()" isn't cryptographically secure, which means generated numbers can be predicted by attackers.
- "basePacketID" and "seqNum" are vital for distinguishing packets, a predictable value can be exploited to inject or replay packets.
- Predictable "basePacketID" and "seqNum" can lead to unauthorized access or data manipulation in sensitive communications.
Fix Details
The fix replaces the non-secure pseudo-random number generator with a cryptographically secure one for generating packet IDs and sequence numbers, ensuring unpredictability in a security-sensitive context.The fix replaces the use of "rand.Uint32()" with "rand.Read()" for generating secure random values.
By using byte arrays "idBytes" and "seqBytes", it ensures the use of cryptographically secure bytes.
The conversion of byte arrays to integer values is done bitwise to ensure proper assignment to "basePacketID" and "seqNum".
The code checks for errors in random byte generation to handle potential failures securely.
💡 Important Instructions: Ensure the
rand package used is the cryptographic one: crypto/rand, not math/rand.
Suggested change
| if config.CompatibilityMode { | |
| if config.CompatibilityMode { |
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