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CVE-2009-1755

16
FAUCET Score

CVE-2009-1755 describes an off-by-one error in the packet_read_query_section and process_query_section functions within NSD versions 3.2.1 and 2.3.7, respectively, which could lead to a denial of service or arbitrary code execution. This vulnerability has a CVSS score of 5.0, indicating a medium severity with a network-based attack vector and low complexity, primarily impacting availability. There is no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
2.0.0CPE matchmatch criteria
cpe:2.3:a:nlnetlabs:nsd:2.0.0:*:*:*:*:*:*:*
2.0.1CPE matchmatch criteria
cpe:2.3:a:nlnetlabs:nsd:2.0.1:*:*:*:*:*:*:*
2.0.2CPE matchmatch criteria
cpe:2.3:a:nlnetlabs:nsd:2.0.2:*:*:*:*:*:*:*
2.1.0CPE matchmatch criteria
cpe:2.3:a:nlnetlabs:nsd:2.1.0:*:*:*:*:*:*:*
2.1.1CPE matchmatch criteria
cpe:2.3:a:nlnetlabs:nsd:2.1.1:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 2.0

5.0MEDIUM

AV:N/AC:L/Au:N/C:N/I:N/A:P

Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
PARTIAL
Access Vector
NETWORK
Access Complexity
LOW
Authentication
NONE
Exploitability Score
10.0
Impact Score
2.9
CvssVersion
2.0

Exploit Intelligence

EPSS Score
3.16%
Probability of exploitation in next 30 days
EPSS Percentile
86.6%
Percentile rank of EPSS score among Peer Group
As of 2026-07-28
Model: v2026.06.15
This CVE's current EPSS score of 0.0316 is in the 81st percentile among its peer group of 23,725 CVEs.

Social Chatter

No social media mentions found for this CVE.

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.0 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Vendor Advisories (1)

redhatCVE-2009-1755Moderate

nsd: one-byte buffer overflow in low-level DNS packet decoding routine

May 19, 2009

References

bugs.debian.org / cgi-bin/bugreport.cgi
Patch
bugs.debian.org / cgi-bin/bugreport.cgi
Patch
nlnetlabs.nl / publications/NSD_vulnerability_announcement.html
PatchVendor Advisory
openwall.com / lists/oss-security/2009/05/19/1