CVE-2008-0122: Buffer overflow in inet_network()


An off-by-one error in the inet_network() function in libbind could lead to memory corruption with certain inputs.

Posting date: 
18 Jan 2008
Program Impacted: 
Versions affected: 
8 (all versions) 9.0 (all versions) 9.1 (all versions) 9.2 (all versions) 9.3.0, 9.3.1, 9.3.2, 9.3.3, 9.3.4 9.4.0, 9.4.1, 9.4.2 9.5.0a1, 9.5.0a2, 9.5.0a3, 9.5.0a4, 9.5.0a5, 9.5.0a6, 9.5.0a7, 9.5.0b1


An off-by-one error in the inet_network() function in libbind could lead to memory corruption with certain inputs.


Applications linked against libbind which call inet_network() with untrusted inputs could lead to a denial-of-service or potentially code execution.?



Active exploits:

None known at this time. 


Upgrade to 9.3.5, 9.4.3, 9.5.0b2 or later when released.

Otherwise, apply the patch below to:

BIND 9: lib/bind/inet/inet_network.c
BIND 8: lib/inet/inet_network.c

Index: inet_network.c
diff -u inet_network.c:1.5 inet_network.c:1.6
--- inet_network.c:1.5 Wed Apr 27 04:56:21 2005
+++ inet_network.c Tue Jan 15 04:02:01 2008
@@ -84,9 +84,9 @@
if (!digit)
return (INADDR_NONE);
+ if (pp >= parts 4 || val > 0xffU)
+ return (INADDR_NONE);
if (*cp == '.') {
- if (pp >= parts + 4 || val > 0xffU)
- return (INADDR_NONE);
*pp++ = val, cp++;
goto again;

Questions should be addressed to

Acknowledgements: ISC would like to thank Nate Eldredge for reporting this.  

Related Documents:

See our BIND Security Matrix for a complete listing of Security Vulnerabilities and versions affected.

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