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CVE-2011-3205

35
FAUCET Score

CVE-2011-3205 is a buffer overflow vulnerability in the gopherToHTML function of the Squid proxy server, affecting versions 3.0 before 3.0.STABLE26, 3.1 before 3.1.15, and 3.2 before 3.2.0.11. A remote Gopher server can exploit this by sending a long line in a response, leading to a denial of service (memory corruption and daemon restart) or potentially other unspecified impacts. With a CVSS score of 6.8 (medium severity), it has a high EPSS score of 0.74962, indicating a higher-than-average probability of exploitation. Despite this, there is no known active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage.

Impacted Technologies

VendorProductVersion(s)CPE
3.0.stable1CPE matchmatch criteria
cpe:2.3:a:squid-cache:squid:3.0.stable1:*:*:*:*:*:*:*
3.0.stable2CPE matchmatch criteria
cpe:2.3:a:squid-cache:squid:3.0.stable2:*:*:*:*:*:*:*
3.0.stable3CPE matchmatch criteria
cpe:2.3:a:squid-cache:squid:3.0.stable3:*:*:*:*:*:*:*
3.0.stable4CPE matchmatch criteria
cpe:2.3:a:squid-cache:squid:3.0.stable4:*:*:*:*:*:*:*
3.0.stable5CPE matchmatch criteria
cpe:2.3:a:squid-cache:squid:3.0.stable5:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 2.0

6.8MEDIUM

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

Confidentiality Impact
PARTIAL
Integrity Impact
PARTIAL
Availability Impact
PARTIAL
Access Vector
NETWORK
Access Complexity
MEDIUM
Authentication
NONE
Exploitability Score
8.6
Impact Score
6.4
CvssVersion
2.0

Exploit Intelligence

EPSS Score
27.45%
Probability of exploitation in next 30 days
EPSS Percentile
97.9%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.2745 is in the 98th percentile among its peer group of 19,956 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 (2)

redhatpatch availablevia nvd_reference
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 6Fixed in: squid-7:3.1.10-1.el6_1.1
View patch

Vendor Advisories (1)

redhatCVE-2011-3205Moderate

squid: buffer overflow flaw in Squid's Gopher reply parser (SQUID-2011:3)

Aug 28, 2011

References

lists.fedoraproject.org / pipermail/package-announce/2011-September/065534.html
lists.opensuse.org / opensuse-security-announce/2011-09/msg00012.html
lists.opensuse.org / opensuse-security-announce/2011-09/msg00013.html
lists.opensuse.org / opensuse-security-announce/2016-08/msg00010.html
lists.opensuse.org / opensuse-security-announce/2016-08/msg00040.html
openwall.com / lists/oss-security/2011/08/29/2
openwall.com / lists/oss-security/2011/08/30/4
openwall.com / lists/oss-security/2011/08/30/8
bugzilla.redhat.com / show_bug.cgi
Patch
secunia.com / advisories/45805
Vendor Advisory
secunia.com / advisories/45906
secunia.com / advisories/45920
secunia.com / advisories/45965
secunia.com / advisories/46029
securitytracker.com / id
debian.org / security/2011/dsa-2304
mandriva.com / security/advisories
osvdb.org / 74847
redhat.com / support/errata/RHSA-2011-1293.html
securityfocus.com / bid/49356
squid-cache.org / Advisories/SQUID-2011_3.txt
squid-cache.org / Versions/v2/2.HEAD/changesets/12710.patch
Patch
squid-cache.org / Versions/v3/3.0/changesets/squid-3.0-9193.patch
Patch
squid-cache.org / Versions/v3/3.1/changesets/squid-3.1-10363.patch
Patch
squid-cache.org / Versions/v3/3.2/changesets/squid-3.2-11294.patch
Patch