Vulnerability Name:

CVE-2015-6525 (CCN-106188)

Assigned:2015-01-05
Published:2015-01-05
Updated:2015-08-26
Summary:Multiple integer overflows in the evbuffer API in Libevent 2.0.x before 2.0.22 and 2.1.x before 2.1.5-beta allow context-dependent attackers to cause a denial of service or possibly have other unspecified impact via "insanely large inputs" to the (1) evbuffer_add, (2) evbuffer_prepend, (3) evbuffer_expand, (4) exbuffer_reserve_space, or (5) evbuffer_read function, which triggers a heap-based buffer overflow or an infinite loop.
Note: this identifier was SPLIT from CVE-2014-6272 per ADT3 due to different affected versions.
CVSS v3 Severity:4.0 Medium (CCN CVSS v3.1 Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L)
Exploitability Metrics:Attack Vector (AV): Local
Attack Complexity (AC): Low
Privileges Required (PR): None
User Interaction (UI): None
Scope:Scope (S): Unchanged
Impact Metrics:Confidentiality (C): None
Integrity (I): None
Availibility (A): Low
CVSS v2 Severity:7.5 High (CVSS v2 Vector: AV:N/AC:L/Au:N/C:P/I:P/A:P)
5.5 Medium (Temporal CVSS v2 Vector: AV:N/AC:L/Au:N/C:P/I:P/A:P/E:U/RL:OF/RC:C)
Exploitability Metrics:Access Vector (AV): Network
Access Complexity (AC): Low
Authentication (Au): None
Impact Metrics:Confidentiality (C): Partial
Integrity (I): Partial
Availibility (A): Partial
1.9 Low (CCN CVSS v2 Vector: AV:L/AC:M/Au:N/C:N/I:N/A:P)
1.4 Low (CCN Temporal CVSS v2 Vector: AV:L/AC:M/Au:N/C:N/I:N/A:P/E:U/RL:OF/RC:C)
Exploitability Metrics:Access Vector (AV): Local
Access Complexity (AC): Medium
Athentication (Au): None
Impact Metrics:Confidentiality (C): None
Integrity (I): None
Availibility (A): Partial
Vulnerability Type:CWE-189
Vulnerability Consequences:Gain Access
References:Source: CCN
Type: libevent Mailing List, Mon, 5 Jan 2015 10:27:49 -0500
[Libevent-users] Advisory: integer overflow in evbuffers for Libevent 1.4.14b,2.0.21,2.1.4-alpha [CVE-2014-6272]

Source: MLIST
Type: Vendor Advisory
[Libevent-users] 20150105 Advisory: integer overflow in evbuffers for Libevent <= 1.4.14b,2.0.21,2.1.4-alpha [CVE-2014-6272]

Source: MITRE
Type: CNA
CVE-2015-6525

Source: CCN
Type: Libevent Web site
libevent – an event notification library

Source: DEBIAN
Type: UNKNOWN
DSA-3119

Source: XF
Type: UNKNOWN
libevent-cve20156525-dos(106188)

Source: CCN
Type: WhiteSource Vulnerability Database
CVE-2015-6525

Vulnerable Configuration:Configuration 1:
  • cpe:/o:debian:debian_linux:7.1:*:*:*:*:*:*:*

    • Configuration 2:
  • cpe:/a:libevent_project:libevent:2.0.1:*:*:*:*:*:*:*
  • OR cpe:/a:libevent_project:libevent:2.0.2:*:*:*:*:*:*:*
  • OR cpe:/a:libevent_project:libevent:2.0.3:*:*:*:*:*:*:*
  • OR cpe:/a:libevent_project:libevent:2.0.4:*:*:*:*:*:*:*
  • OR cpe:/a:libevent_project:libevent:2.0.5:*:*:*:*:*:*:*
  • OR cpe:/a:libevent_project:libevent:2.0.6:*:*:*:*:*:*:*
  • OR cpe:/a:libevent_project:libevent:2.0.7:*:*:*:*:*:*:*
  • OR cpe:/a:libevent_project:libevent:2.0.8:*:*:*:*:*:*:*
  • OR cpe:/a:libevent_project:libevent:2.0.9:*:*:*:*:*:*:*
  • OR cpe:/a:libevent_project:libevent:2.0.10:*:*:*:*:*:*:*
  • OR cpe:/a:libevent_project:libevent:2.0.11:*:*:*:*:*:*:*
  • OR cpe:/a:libevent_project:libevent:2.0.12:*:*:*:*:*:*:*
  • OR cpe:/a:libevent_project:libevent:2.0.13:*:*:*:*:*:*:*
  • OR cpe:/a:libevent_project:libevent:2.0.14:*:*:*:*:*:*:*
  • OR cpe:/a:libevent_project:libevent:2.0.15:*:*:*:*:*:*:*
  • OR cpe:/a:libevent_project:libevent:2.0.16:*:*:*:*:*:*:*
  • OR cpe:/a:libevent_project:libevent:2.0.17:*:*:*:*:*:*:*
  • OR cpe:/a:libevent_project:libevent:2.0.18:*:*:*:*:*:*:*
  • OR cpe:/a:libevent_project:libevent:2.0.19:*:*:*:*:*:*:*
  • OR cpe:/a:libevent_project:libevent:2.0.20:*:*:*:*:*:*:*
  • OR cpe:/a:libevent_project:libevent:2.0.21:*:*:*:*:*:*:*
  • OR cpe:/a:libevent_project:libevent:2.1.1:*:*:*:*:*:*:*
  • OR cpe:/a:libevent_project:libevent:2.1.2:*:*:*:*:*:*:*
  • OR cpe:/a:libevent_project:libevent:2.1.3:*:*:*:*:*:*:*
  • OR cpe:/a:libevent_project:libevent:2.1.4:*:*:*:*:*:*:*

    • * Denotes that component is vulnerable
    Oval Definitions
    Definition IDClassTitleLast Modified
    oval:com.ubuntu.precise:def:20156525000
    V
    		CVE-2015-6525 on Ubuntu 12.04 LTS (precise) - medium.
    2015-08-24
    oval:com.ubuntu.trusty:def:20156525000
    V
    		CVE-2015-6525 on Ubuntu 14.04 LTS (trusty) - medium.
    2015-08-24
    BACK
    debian debian linux 7.1
    libevent_project libevent 2.0.1
    libevent_project libevent 2.0.2
    libevent_project libevent 2.0.3
    libevent_project libevent 2.0.4
    libevent_project libevent 2.0.5
    libevent_project libevent 2.0.6
    libevent_project libevent 2.0.7
    libevent_project libevent 2.0.8
    libevent_project libevent 2.0.9
    libevent_project libevent 2.0.10
    libevent_project libevent 2.0.11
    libevent_project libevent 2.0.12
    libevent_project libevent 2.0.13
    libevent_project libevent 2.0.14
    libevent_project libevent 2.0.15
    libevent_project libevent 2.0.16
    libevent_project libevent 2.0.17
    libevent_project libevent 2.0.18
    libevent_project libevent 2.0.19
    libevent_project libevent 2.0.20
    libevent_project libevent 2.0.21
    libevent_project libevent 2.1.1
    libevent_project libevent 2.1.2
    libevent_project libevent 2.1.3
    libevent_project libevent 2.1.4