CVE-2015-5315

Description

The eap_pwd_process function in eap_peer/eap_pwd.c in wpa_supplicant 2.x before 2.6 does not validate that the reassembly buffer is large enough for the final fragment when EAP-pwd is enabled in a network configuration profile, which allows remote attackers to cause a denial of service (process termination) via a large final fragment in an EAP-pwd message.

CVSS Metrics

• v3.0•MEDIUM•Score: 5.9CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
• v2.0•MEDIUM•Score: 4.3AV:N/AC:M/Au:N/C:N/I:N/A:P

EPSS Trends

Current EPSS score: 1.15%• Percentile: 79%

Techniques & Countermeasures

• CWE-119•Improper Restriction of Operations within the Bounds of a Memory Buffer

  The product performs operations on a memory buffer, but it reads from or writes to a memory location outside the buffer's intended boundary. This may result in read or write operations on unexpected memory locations that could be linked to other variables, data structures, or internal program data.

Affected Systems

• debian•debian_linux

  8.0

• w1.fi•wpa_supplicant

  ≥ 2.0, < 2.6

References (4)

• http://www.ubuntu.com/usn/USN-2808-1
• https://www.debian.org/security/2015/dsa-3397
• http://w1.fi/security/2015-7/eap-pwd-missing-last-fragment-length-validation.txt
• http://www.openwall.com/lists/oss-security/2015/11/10/10