5

CVE-2011-3368: apache http_server Improper Input Validation

CVSS: 5.0v2.0MediumModified
AliasesRHSA-2011:1392DEBIAN-CVE-2011-3368
Published 05-10-2011Last modified 06-08-2024
Open JSON

Vulnerability summary

CVE-2011-3368 is a medium (CVSS 5.0) Improper Input Validation vulnerability in apache http_server. EPSS estimates a 90.73% chance of exploitation in the next 30 days, higher than 99.8% of scored vulnerabilities. 4 public exploits are recorded.

Overall risk
48/100
0100
Medium · default modelHow is this calculated?
CVSS score
5.0/10
010
Medium · v2.0 (NVD)
EPSS score
90.73%
0%100%
Critical · 0.00 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits4reference, exploit-database, metasploit

Advisory lineage

Upstream 0 · Downstream 4 · Related 1
DSA-2405-1OPENSUSE-SU-2024:10268-1RHSA-2011:1391RHSA-2012:0542

Timeline

  1. 05-10-2011
    PublishedVulnerability first disclosed.
  2. 06-08-2024
    Last modifiedVulnerability information updated.

Description

The mod_proxy module in the Apache HTTP Server 1.3.x through 1.3.42, 2.0.x through 2.0.64, and 2.2.x through 2.2.21 does not properly interact with use of (1) RewriteRule and (2) ProxyPassMatch pattern matches for configuration of a reverse proxy, which allows remote attackers to send requests to intranet servers via a malformed URI containing an initial @ (at sign) character.

CVSS metrics

1 score · 1 source · 1 version

EPSS trend

Probability

90.73%

Chance of exploitation in the next 30 days

Percentile

100%

Versus all other CVEs

30-day change

0.00 pp

From 90.73% on 19-09-2026

19-09-202619-10-2026
EPSS score
90.73%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

4 found
  • referenceUnverified

    Exploit Reference (web.archiveorange.com)

    Maturity: unknown

  • referenceUnverified

    Exploit Reference (bugzilla.redhat.com)

    Maturity: unknown

  • exploit-databaseremotemultipleVerified

    Apache mod_proxy - Reverse Proxy Exposure

    Maturity: weaponized

Show all 4 exploits
  • MetasploitMetasploitremoteUnverified

    Apache Reverse Proxy Bypass Vulnerability Scanner

    auxiliary/scanner/http/rewrite_proxy_bypass

    Maturity: poc

Weaknesses

CWE · root cause

Affected systems

Redhat6 products
  • httpd< 0:2.0.52-49.ent | < 0:2.2.3-53.el5_7.3
  • httpd-debuginfo< 0:2.0.52-49.ent | < 0:2.2.3-53.el5_7.3
  • httpd-devel< 0:2.0.52-49.ent | < 0:2.2.3-53.el5_7.3
  • httpd-manual< 0:2.0.52-49.ent | < 0:2.2.3-53.el5_7.3
  • httpd-suexec< 0:2.0.52-49.ent
Apache1 product
  • http_serverEOL1.3 | 1.3.0 | 1.3.1 | 1.3.11 | 1.3.2 | 1.3.3 | 1.3.4 | 1.3.5 | 1.3.6 | 1.3.7 | 1.3.8 | 1.3.9 | 1.3.10 | 1.3.12 | 1.3.13 | 1.3.14 | 1.3.15 | 1.3.16 | 1.3.17 | 1.3.18 | 1.3.19 | 1.3.20 | 1.3.22 | 1.3.23 | 1.3.24 | 1.3.25 | 1.3.26 | 1.3.27 | 1.3.28 | 1.3.29 | 1.3.30 | 1.3.31 | 1.3.32 | 1.3.33 | 1.3.34 | 1.3.35 | 1.3.36 | 1.3.37 | 1.3.38 | 1.3.39 | 1.3.41 | 1.3.42 | 1.3.65 | 1.3.68 | 2.0 | 2.0.9 | 2.0.28 | 2.0.28:beta | 2.0.32 | 2.0.32:beta | 2.0.34:beta | 2.0.35 | 2.0.36 | 2.0.37 | 2.0.38 | 2.0.39 | 2.0.40 | 2.0.41 | 2.0.42 | 2.0.43 | 2.0.44 | 2.0.45 | 2.0.46 | 2.0.47 | 2.0.48 | 2.0.49 | 2.0.50 | 2.0.51 | 2.0.52 | 2.0.53 | 2.0.54 | 2.0.55 | 2.0.56 | 2.0.57 | 2.0.58 | 2.0.59 | 2.0.60 | 2.0.61 | 2.0.63 | 2.0.64 | 2.2.0 | 2.2.1 | 2.2.2 | 2.2.3 | 2.2.4 | 2.2.6 | 2.2.8 | 2.2.9 | 2.2.10 | 2.2.11 | 2.2.12 | 2.2.13 | 2.2.14 | 2.2.15 | 2.2.16 | 2.2.18 | 2.2.19 | 2.2.20 | 2.2.21
Debian1 product
  • apache2< 2.2.21-2

3 vendors · 8 products

References

65 links
Show all 65 references