cbcvebase.
CVE-2010-4227
published 2011-02-25

CVE-2010-4227: The xdrDecodeString function in XNFS.NLM in Novell Netware 6.5 before SP8 allows remote attackers to cause a denial of service (abend) or execute arbitrary…

PriorityP264critical10CVSS 2.0
AVNACLAuNCCICAC
EXPLOIT
EPSS
16.82%
96.7th percentile
The xdrDecodeString function in XNFS.NLM in Novell Netware 6.5 before SP8 allows remote attackers to cause a denial of service (abend) or execute arbitrary code via a crafted, signed value in a NFS RPC request to port UDP 1234, leading to a stack-based buffer overflow.

Affected

2 ranges
VendorProductVersion rangeFixed in
novellnetware<= 6.5
novellnetware

Detection & IOCsextracted from sources · hover to see the quote

portUDP/1234
filenameXNFS.NLM
  • Detect exploit attempts by monitoring for UDP packets to port 1234 containing the RPC MOUNT program identifier (0x000186a5) with a crafted/signed length value in the xdrDecodeString field, targeting Novell NetWare NFS service (XNFS.NLM).
  • The exploit PoC sends a UDP packet to port 1234 with RPC program number 10005 (MOUNT, 0x000186a5), version 2, procedure MNT (1), with a NULL verifier and a 4-byte payload (0x41424344). Alert on UDP/1234 traffic matching this RPC structure.
  • The fixed XID value 0x1cd1efab in the RPC header can serve as a signature byte for this specific PoC exploit payload.
  • ·The vulnerability affects Novell NetWare 6.5 only before SP8; systems patched to SP8 or later are not vulnerable. Ensure NFS/XNFS service is not unnecessarily exposed on UDP/1234.
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