Title: NSD 'packet.c' Off-By-One Buffer Overflow Vulnerability
Severity: CRITICAL
Description:
NSD is a name server.
NSD is prone to an off-by-one buffer-overflow vulnerability because the server fails to perform adequate boundary checks on user-supplied data. The vulnerability occurs in the 'packet_read_query_section()' function of 'packet.c' and in the 'process_query_section()' function of 'query.c'.
Attackers can exploit this issue by sending a specially crafted packet to the vulnerable server. Successfully exploiting this issue will allow attackers to execute arbitrary code within the context of the server. Failed exploit attempts will result in a denial-of-service condition.
Versions prior to NSD 3.2.2 are vulnerable.
Affected Products:
- Debian Linux 4.0
- Debian Linux 4.0 alpha
- Debian Linux 4.0 amd64
- Debian Linux 4.0 arm
- Debian Linux 4.0 armel
- Debian Linux 4.0 hppa
- Debian Linux 4.0 ia-32
- Debian Linux 4.0 ia-64
- Debian Linux 4.0 m68k
- Debian Linux 4.0 mips
- Debian Linux 4.0 mipsel
- Debian Linux 4.0 powerpc
- Debian Linux 4.0 s/390
- Debian Linux 4.0 sparc
- Debian Linux 5.0
- Debian Linux 5.0 alpha
- Debian Linux 5.0 amd64
- Debian Linux 5.0 arm
- Debian Linux 5.0 armel
- Debian Linux 5.0 hppa
- Debian Linux 5.0 ia-32
- Debian Linux 5.0 ia-64
- Debian Linux 5.0 m68k
- Debian Linux 5.0 mips
- Debian Linux 5.0 mipsel
- Debian Linux 5.0 powerpc
- Debian Linux 5.0 s/390
- Debian Linux 5.0 sparc
- NLnet Labs NSD 2.0.0
- NLnet Labs NSD 2.3.7
- NLnet Labs NSD 3.2.1
- RedHat Fedora 10
- RedHat Fedora 9
References:
- NLnet Labs: NSD Homepage
- NLnet Labs: NSD Vulnerability Announcement
- Ondrej Sury: Critical off-by-one error in NSD2
- Ondrej Sury: Critical off-by-one error in NSD3
- US-CERT: Vulnerability Note VU#710316 NSD vulnerable to one-byte overflow
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