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Sid 1-19825

Message

SERVER-APACHE Apache Killer denial of service tool exploit attempt

Summary

The byterange filter in the Apache HTTP Server 1.3.x, 2.0.x through 2.0.64, and 2.2.x through 2.2.19 allows remote attackers to cause a denial of service (memory and CPU consumption) via a Range header that expresses multiple overlapping ranges, as exploited in the wild in August 2011, a different vulnerability than CVE-2007-0086.

Impact

CVSS base score 7.8 CVSS impact score 6.9 CVSS exploitability score 10.0 confidentialityImpact NONE integrityImpact NONE availabilityImpact NONE

CVE-2011-3192:

CVSS base score 7.8

CVSS impact score 6.9

CVSS exploitability score 10.0

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact COMPLETE

Detailed information

CVE-2011-3192: The byterange filter in the Apache HTTP Server 1.3.x, 2.0.x through 2.0.64, and 2.2.x through 2.2.19 allows remote attackers to cause a denial of service (memory and CPU consumption) via a Range header that expresses multiple overlapping ranges, as exploited in the wild in August 2011, a different vulnerability than CVE-2007-0086.

Affected systems

  • apache http_server 1.3
  • apache http_server 1.3.0
  • apache http_server 1.3.1
  • apache http_server 1.3.1.1
  • apache http_server 1.3.2
  • apache http_server 1.3.3
  • apache http_server 1.3.4
  • apache http_server 1.3.5
  • apache http_server 1.3.6
  • apache http_server 1.3.7
  • apache http_server 1.3.8
  • apache http_server 1.3.9
  • apache http_server 1.3.10
  • apache http_server 1.3.11
  • apache http_server 1.3.12
  • apache http_server 1.3.13
  • apache http_server 1.3.14
  • apache http_server 1.3.15
  • apache http_server 1.3.16
  • apache http_server 1.3.17
  • apache http_server 1.3.18
  • apache http_server 1.3.19
  • apache http_server 1.3.20
  • apache http_server 1.3.22
  • apache http_server 1.3.23
  • apache http_server 1.3.24
  • apache http_server 1.3.25
  • apache http_server 1.3.26
  • apache http_server 1.3.27
  • apache http_server 1.3.28
  • apache http_server 1.3.29
  • apache http_server 1.3.30
  • apache http_server 1.3.31
  • apache http_server 1.3.32
  • apache http_server 1.3.33
  • apache http_server 1.3.34
  • apache http_server 1.3.35
  • apache http_server 1.3.36
  • apache http_server 1.3.37
  • apache http_server 1.3.38
  • apache http_server 1.3.39
  • apache http_server 1.3.41
  • apache http_server 1.3.42
  • apache http_server 1.3.65
  • apache http_server 1.3.68
  • apache http_server 2.0
  • apache http_server 2.0.9
  • apache http_server 2.0.28
  • apache http_server 2.0.32
  • apache http_server 2.0.34
  • apache http_server 2.0.35
  • apache http_server 2.0.36
  • apache http_server 2.0.37
  • apache http_server 2.0.38
  • apache http_server 2.0.39
  • apache http_server 2.0.40
  • apache http_server 2.0.41
  • apache http_server 2.0.42
  • apache http_server 2.0.43
  • apache http_server 2.0.44
  • apache http_server 2.0.45
  • apache http_server 2.0.46
  • apache http_server 2.0.47
  • apache http_server 2.0.48
  • apache http_server 2.0.49
  • apache http_server 2.0.50
  • apache http_server 2.0.51
  • apache http_server 2.0.52
  • apache http_server 2.0.53
  • apache http_server 2.0.54
  • apache http_server 2.0.55
  • apache http_server 2.0.56
  • apache http_server 2.0.57
  • apache http_server 2.0.58
  • apache http_server 2.0.59
  • apache http_server 2.0.60
  • apache http_server 2.0.61
  • apache http_server 2.0.63
  • apache http_server 2.0.64
  • apache http_server 2.2.0
  • apache http_server 2.2.1
  • apache http_server 2.2.2
  • apache http_server 2.2.3
  • apache http_server 2.2.4
  • apache http_server 2.2.6
  • apache http_server 2.2.8
  • apache http_server 2.2.9
  • apache http_server 2.2.10
  • apache http_server 2.2.11
  • apache http_server 2.2.12
  • apache http_server 2.2.13
  • apache http_server 2.2.14
  • apache http_server 2.2.15
  • apache http_server 2.2.16
  • apache http_server 2.2.18
  • apache http_server 2.2.19

Ease of attack

CVE-2011-3192:

Access Vector NETWORK

Access Complexity LOW

Authentication NONE

False positives

None known

False negatives

None known

Corrective action

Upgrade to the latest non-affected version of the software.

Apply the appropriate vendor supplied patches.

Contributors

  • Talos research team.
  • This document was generated from data supplied by the national vulnerability database, a product of the national institute of standards and technology.
  • For more information see nvd.

Additional References

  • archives.neohapsis.com/archives/fulldisclosure/2011-08/0203.html
  • osvdb.org/show/osvdb/74721