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CVE-2006-4340

14
FAUCET Score

CVE-2006-4340 describes a vulnerability in the Mozilla Network Security Service (NSS) library, affecting Firefox, Thunderbird, and SeaMonkey versions before 1.5.0.7. This flaw allows remote attackers to forge SSL/TLS and email certificate signatures when an RSA key with exponent 3 is used, due to improper handling of extra data in the signature. The vulnerability has a CVSS score of 4.0, indicating a network-based attack with high access complexity and partial impact on confidentiality and integrity. There is no evidence of active exploitation, publicly available exploit code, or significant community discussion surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
<= 1.5.0.6CPE matchmatch criteria
cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:*
<= 3.11.2CPE matchmatch criteria
cpe:2.3:a:mozilla:network_security_services:*:*:*:*:*:*:*:*
<= 1.0.4CPE matchmatch criteria
cpe:2.3:a:mozilla:seamonkey:*:*:*:*:*:*:*:*
<= 1.5.0.6CPE matchmatch criteria
cpe:2.3:a:mozilla:thunderbird:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 2.0

4.0MEDIUM

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

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

Exploit Intelligence

EPSS Score
2.15%
Probability of exploitation in next 30 days
EPSS Percentile
80.2%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0215 is in the 67th percentile among its peer group of 19,958 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, 0.0 Bluesky, 0.0 Mastodon, and 0.2 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

Patch Available

Vendor Patches (5)

redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 3Fixed in: seamonkey-0:1.0.5-0.1.el3
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 4Fixed in: firefox-0:1.5.0.7-0.1.el4
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 4Fixed in: devhelp-0:0.10-0.4.el4
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 4Fixed in: seamonkey-0:1.0.5-0.1.el4
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 4Fixed in: thunderbird-0:1.5.0.7-0.1.el4
View patch

Vendor Advisories (1)

redhatCVE-2006-4340Important

security flaw

Sep 15, 2006

References

patches.sgi.com / support/free/security/advisories/20060901-01-P.asc
secunia.com / advisories/21903
Vendor Advisory
secunia.com / advisories/21906
PatchVendor Advisory
secunia.com / advisories/21915
Vendor Advisory
secunia.com / advisories/21916
Vendor Advisory
secunia.com / advisories/21939
Vendor Advisory
secunia.com / advisories/21940
Vendor Advisory
secunia.com / advisories/21949
PatchVendor Advisory
secunia.com / advisories/21950
Vendor Advisory
secunia.com / advisories/22001
Vendor Advisory
secunia.com / advisories/22025
Vendor Advisory
secunia.com / advisories/22036
Vendor Advisory
secunia.com / advisories/22044
secunia.com / advisories/22055
Vendor Advisory
secunia.com / advisories/22056
secunia.com / advisories/22066
secunia.com / advisories/22074
Vendor Advisory
secunia.com / advisories/22088
Vendor Advisory
secunia.com / advisories/22195
secunia.com / advisories/22210
Vendor Advisory
secunia.com / advisories/22226
Vendor Advisory
secunia.com / advisories/22247
Vendor Advisory
secunia.com / advisories/22274
Vendor Advisory
secunia.com / advisories/22299
Vendor Advisory
secunia.com / advisories/22342
Vendor Advisory
secunia.com / advisories/22422
Vendor Advisory
secunia.com / advisories/22446
Vendor Advisory
secunia.com / advisories/22849
secunia.com / advisories/22992
secunia.com / advisories/23883
secunia.com / advisories/24711
security.gentoo.org / glsa/glsa-200609-19.xml
security.gentoo.org / glsa/glsa-200610-01.xml
securitytracker.com / id
securitytracker.com / id
securitytracker.com / id
exchange.xforce.ibmcloud.com / vulnerabilities/30098
issues.rpath.com / browse/RPL-640
oval.cisecurity.org / repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A11007
sunsolve.sun.com / search/document.do
sunsolve.sun.com / search/document.do
support.avaya.com / elmodocs2/security/ASA-2006-224.htm
support.avaya.com / elmodocs2/security/ASA-2006-250.htm
www1.itrc.hp.com / service/cki/docDisplay.do
debian.org / security/2006/dsa-1192
debian.org / security/2006/dsa-1210
gentoo.org / security/en/glsa/glsa-200610-06.xml
imc.org / ietf-openpgp/mail-archive/msg14307.html
mandriva.com / security/advisories
mandriva.com / security/advisories
matasano.com / log/469/many-rsa-signatures-may-be-forgeable-in-openssl-and-elsewhere
mozilla.org / security/announce/2006/mfsa2006-60.html
mozilla.org / security/announce/2006/mfsa2006-66.html
novell.com / linux/security/advisories/2006_54_mozilla.html
novell.com / linux/security/advisories/2006_55_ssl.html
redhat.com / support/errata/RHSA-2006-0675.html
Vendor Advisory
redhat.com / support/errata/RHSA-2006-0676.html
PatchVendor Advisory
redhat.com / support/errata/RHSA-2006-0677.html
PatchVendor Advisory
securityfocus.com / archive/1/446140/100/0/threaded
ubuntu.com / usn/usn-350-1
ubuntu.com / usn/usn-351-1
ubuntu.com / usn/usn-352-1
ubuntu.com / usn/usn-354-1
ubuntu.com / usn/usn-361-1
us-cert.gov / cas/techalerts/TA06-312A.html
US Government Resource
us.debian.org / security/2006/dsa-1191
vupen.com / english/advisories/2006/3617
vupen.com / english/advisories/2006/3622
vupen.com / english/advisories/2006/3748
vupen.com / english/advisories/2006/3899
vupen.com / english/advisories/2007/0293
vupen.com / english/advisories/2007/1198
vupen.com / english/advisories/2008/0083