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CVE-2008-4099

18
FAUCET Score

CVE-2008-4099 describes a vulnerability in PyDNS (aka python-dns) versions prior to 2.3.1-4 in Debian GNU/Linux. This flaw stems from the software's failure to utilize random source ports or transaction IDs for DNS requests, making it susceptible to DNS response spoofing. The vulnerability carries a CVSS score of 6.4, indicating a medium severity. It is a network-based attack with low attack complexity, requiring no authentication, and could lead to partial integrity and availability impacts. There is no evidence of active exploitation, and no public exploit code is available via Metasploit, Nuclei, or ExploitDB. The CVE has received minimal community discussion and media coverage, suggesting low public awareness and attention.

Impacted Technologies

VendorProductVersion(s)CPE
<= 2.3.1-3CPE matchmatch criteria
cpe:2.3:a:debian:python-dns:*:*:*:*:*:*:*:*
2.3.0-1CPE matchmatch criteria
cpe:2.3:a:debian:python-dns:2.3.0-1:*:*:*:*:*:*:*
2.3.0-2CPE matchmatch criteria
cpe:2.3:a:debian:python-dns:2.3.0-2:*:*:*:*:*:*:*
2.3.0-3CPE matchmatch criteria
cpe:2.3:a:debian:python-dns:2.3.0-3:*:*:*:*:*:*:*
2.3.0-4CPE matchmatch criteria
cpe:2.3:a:debian:python-dns:2.3.0-4:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 2.0

6.4MEDIUM

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

Confidentiality Impact
NONE
Integrity Impact
PARTIAL
Availability Impact
PARTIAL
Access Vector
NETWORK
Access Complexity
LOW
Authentication
NONE
Exploitability Score
10.0
Impact Score
4.9
CvssVersion
2.0

Exploit Intelligence

EPSS Score
2.28%
Probability of exploitation in next 30 days
EPSS Percentile
81.3%
Percentile rank of EPSS score among Peer Group
As of 2026-07-25
Model: v2026.06.15
This CVE's current EPSS score of 0.0228 is in the 71st percentile among its peer group of 23,701 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-2008-4099Moderate

python-PyDNS: insecure DNS transaction ids

Sep 11, 2008

References

bugs.debian.org / cgi-bin/bugreport.cgi
Exploit
packages.debian.org / changelogs/pool/main/p/python-dns/python-dns_2.3.3-1/changelog
openwall.com / lists/oss-security/2008/09/11/1
openwall.com / lists/oss-security/2008/09/16/4