mod_proxy module for Apache ap_proxy_send_fb() buffer overflow

modproxy-approxysendfb-bo (55941) The risk level is classified as HighHigh Risk

Description:

The mod_proxy module for Apache is vulnerable to a heap-based buffer overflow, caused by an integer overflow error in the ap_proxy_send_fb() function. If the size of the "int" datatype is less than the "long" datatype, a remote attacker could overflow a buffer and execute arbitrary code on the system or cause the application to crash.

*CVSS:

Base Score: 6.8
  Access Vector: Network
  Access Complexity: Medium
  Authentication: None
  Confidentiality Impact: Partial
  Integrity Impact: Partial
  Availability Impact: Partial
 
Temporal Score: 5.3
  Exploitability: Proof-of-Concept
  Remediation Level: Official-Fix
  Report Confidence: Confirmed

Consequences:

Gain Access

Remedy:

Upgrade to the latest version of Apache (1.3.42 or later), available from the Apache Web site. See References.

References:

  • Apache.org Web Site: Changes with Apache 1.3.42.
  • Full-Disclosure Mailing List, Wed Jan 27 2010: Mod_proxy from apache 1.3 - Integer overflow which causes heap overflow.
  • BID-37966: Apache 1.3 mod_proxy HTTP Chunked Encoding Integer Overflow Vulnerability
  • CVE-2010-0010: Integer overflow in the ap_proxy_send_fb function in proxy/proxy_util.c in mod_proxy in the Apache HTTP Server before 1.3.42 on 64-bit platforms allows remote origin servers to cause a denial of service (daemon crash) or possibly execute arbitrary code via a large chunk size that triggers a heap-based buffer overflow.
  • OSVDB ID: 62009: Apache HTTP Server src/modules/proxy/proxy_util.c mod_proxy ap_proxy_send_fb() Function Overflow
  • SA38319: Apache mod_proxy "ap_proxy_send_fb()" Integer Truncation Vulnerability
  • SA44532: OpenVMS update for Secure Web Server
  • SECTRACK ID: 1023533: Apache mod_proxy Integer Overflow May Let Remote Users Execute Arbitrary Code

Platforms Affected:

  • 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 1.3.10
  • 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 1.3.2
  • 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 1.3.3
  • 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 1.3.4
  • Apache HTTP Server 1.3.41
  • HP OpenVMS 6.x
  • HP OpenVMS 7.x
  • HP OpenVMS 8.x

Reported:

Jan 28, 2010

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