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CVE-2011-3000

19
FAUCET Score

CVE-2011-3000 describes a vulnerability in Mozilla Firefox, Thunderbird, and SeaMonkey where the browsers improperly handle HTTP responses containing multiple Location, Content-Length, or Content-Disposition headers. This flaw facilitates HTTP response splitting attacks, allowing remote attackers to inject crafted header values. The vulnerability has a CVSS score of 4.3, indicating a medium attack complexity and potential for partial integrity impact, but no confidentiality or availability impact. There is no evidence of active exploitation, publicly available exploit code, or significant community discussion surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
<= 3.6.22CPE matchmatch criteria
cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:*
3.6CPE matchmatch criteria
cpe:2.3:a:mozilla:firefox:3.6:*:*:*:*:*:*:*
3.6.2CPE matchmatch criteria
cpe:2.3:a:mozilla:firefox:3.6.2:*:*:*:*:*:*:*
3.6.3CPE matchmatch criteria
cpe:2.3:a:mozilla:firefox:3.6.3:*:*:*:*:*:*:*
3.6.4CPE matchmatch criteria
cpe:2.3:a:mozilla:firefox:3.6.4:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 2.0

4.3MEDIUM

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

Confidentiality Impact
NONE
Integrity Impact
PARTIAL
Availability Impact
NONE
Access Vector
NETWORK
Access Complexity
MEDIUM
Authentication
NONE
Exploitability Score
8.6
Impact Score
2.9
CvssVersion
2.0

Exploit Intelligence

EPSS Score
2.02%
Probability of exploitation in next 30 days
EPSS Percentile
78.9%
Percentile rank of EPSS score among Peer Group
As of 2026-07-24
Model: v2026.06.15
This CVE's current EPSS score of 0.0202 is in the 64th percentile among its peer group of 19,952 CVEs.

Social Chatter

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 (13)

redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 6Fixed in: thunderbird-0:3.1.15-1.el6_1
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 4Fixed in: firefox-0:3.6.23-1.el4
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 5Fixed in: firefox-0:3.6.23-2.el5_7
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 5Fixed in: xulrunner-0:1.9.2.23-1.el5_7
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 6Fixed in: firefox-0:3.6.23-2.el6_1
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 6Fixed in: xulrunner-0:1.9.2.23-1.el6_1.1
View patch
mozillavendor investigatingvia nvd_reference
View patch
redhatno patchvia redhat_api
Product: Red Hat Enterprise Linux 4Fixed in: seamonkey
redhatno patchvia redhat_api
Product: Red Hat Enterprise Linux 4Fixed in: thunderbird
redhatno patchvia redhat_api
Product: Red Hat Enterprise Linux Extended Update Support 5.7Fixed in: firefox
redhatno patchvia redhat_api
Product: Red Hat Enterprise Linux Extended Update Support 5.7Fixed in: thunderbird
redhatno patchvia redhat_api
Product: Red Hat Enterprise Linux Extended Update Support 6.1Fixed in: firefox
redhatno patchvia redhat_api
Product: Red Hat Enterprise Linux Extended Update Support 6.1Fixed in: thunderbird

Vendor Advisories (1)

redhatCVE-2011-3000Critical

Mozilla: Defense against multiple Location headers due to CRLF Injection (MFSA 2011-39)

Sep 28, 2011

References

lists.opensuse.org / opensuse-security-announce/2011-11/msg00020.html
lists.opensuse.org / opensuse-updates/2011-10/msg00002.html
bugzilla.mozilla.org / show_bug.cgi
secunia.com / advisories/46315
oval.cisecurity.org / repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A14361
debian.org / security/2011/dsa-2312
debian.org / security/2011/dsa-2313
debian.org / security/2011/dsa-2317
mandriva.com / security/advisories
mandriva.com / security/advisories
mandriva.com / security/advisories
mandriva.com / security/advisories
mozilla.org / security/announce/2011/mfsa2011-39.html
Vendor Advisory
redhat.com / support/errata/RHSA-2011-1341.html