Vulnerability Name:

CVE-2016-2427 (CCN-112341)

Assigned:2016-04-07
Published:2016-04-07
Updated:2016-08-18
Summary:** DISPUTED ** The AES-GCM specification in RFC 5084, as used in Android 5.x and 6.x, recommends 12 octets for the aes-ICVlen parameter field, which might make it easier for attackers to defeat a cryptographic protection mechanism and discover an authentication key via a crafted application, aka internal bug 26234568.
Note: The vendor disputes the existence of this potential issue in Android, stating "This CVE was raised in error: it referred to the authentication tag size in GCM, whose default according to ASN.1 encoding (12 bytes) can lead to vulnerabilities. After careful consideration, it was decided that the insecure default value of 12 bytes was a default only for the encoding and not default anywhere else in Android, and hence no vulnerability existed."
CVSS v3 Severity:5.5 Medium (CVSS v3.1 Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N)
4.8 Medium (Temporal CVSS v3.1 Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N/E:U/RL:O/RC:C)
Exploitability Metrics:Attack Vector (AV): Local
Attack Complexity (AC): Low
Privileges Required (PR): None
User Interaction (UI): Required
Scope:Scope (S): Unchanged
Impact Metrics:Confidentiality (C): High
Integrity (I): None
Availibility (A): None
5.3 Medium (CCN CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N)
4.6 Medium (CCN Temporal CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N/E:U/RL:O/RC:C)
Exploitability Metrics:Attack Vector (AV): Network
Attack Complexity (AC): Low
Privileges Required (PR): None
User Interaction (UI): None
Scope:Scope (S): Unchanged
Impact Metrics:Confidentiality (C): None
Integrity (I): Low
Availibility (A): None
CVSS v2 Severity:4.3 Medium (CVSS v2 Vector: AV:N/AC:M/Au:N/C:P/I:N/A:N)
Exploitability Metrics:Access Vector (AV): Network
Access Complexity (AC): Medium
Authentication (Au): None
Impact Metrics:Confidentiality (C): Partial
Integrity (I): None
Availibility (A): None
5.0 Medium (CCN CVSS v2 Vector: AV:N/AC:L/Au:N/C:N/I:P/A:N)
Exploitability Metrics:Access Vector (AV): Network
Access Complexity (AC): Low
Athentication (Au): None
Impact Metrics:Confidentiality (C): None
Integrity (I): Partial
Availibility (A): None
Vulnerability Type:CWE-200
Vulnerability Consequences:Bypass Security
References:Source: CCN
Type: Google Web site
Android

Source: MITRE
Type: CNA
CVE-2016-2427

Source: CCN
Type: Android Open Source Project
Nexus Security Bulletin—April 2016

Source: CONFIRM
Type: Vendor Advisory
http://source.android.com/security/bulletin/2016-04-02.html

Source: XF
Type: UNKNOWN
android-cve20162427-weak-security(112341)

Source: CCN
Type: IBM Security Bulletin 6367945 (Sterling B2B Integrator)
Multiple Bouncy Castle Vulnerabilities Affect IBM Sterling B2B Integrator

Vulnerable Configuration:Configuration 1:
  • cpe:/a:bouncycastle:legion-of-the-bouncy-castle-java-crytography-api:1.54:*:*:*:*:*:*:*

    • Configuration 2:
  • cpe:/o:google:android:5.0:*:*:*:*:*:*:*
  • OR cpe:/o:google:android:5.0.1:*:*:*:*:*:*:*
  • OR cpe:/o:google:android:5.1:*:*:*:*:*:*:*
  • OR cpe:/o:google:android:5.1.0:*:*:*:*:*:*:*
  • OR cpe:/o:google:android:6.0:*:*:*:*:*:*:*
  • OR cpe:/o:google:android:6.0.1:*:*:*:*:*:*:*

    • Configuration CCN 1:
  • cpe:/o:google:android:6.0.1:*:*:*:*:*:*:*
  • AND
  • cpe:/a:ibm:sterling_b2b_integrator:5.2.0.0:*:*:*:*:*:*:*
  • OR cpe:/a:ibm:sterling_b2b_integrator:6.0.3.2:*:*:*:standard:*:*:*

    • * Denotes that component is vulnerable
    Oval Definitions
    Definition IDClassTitleLast Modified
    oval:com.ubuntu.artful:def:20162427000
    V
    		CVE-2016-2427 on Ubuntu 17.10 (artful) - low.
    2016-04-17
    oval:com.ubuntu.xenial:def:201624270000000
    V
    		CVE-2016-2427 on Ubuntu 16.04 LTS (xenial) - low.
    2016-04-17
    oval:com.ubuntu.precise:def:20162427000
    V
    		CVE-2016-2427 on Ubuntu 12.04 LTS (precise) - low.
    2016-04-17
    oval:com.ubuntu.trusty:def:20162427000
    V
    		CVE-2016-2427 on Ubuntu 14.04 LTS (trusty) - low.
    2016-04-17
    oval:com.ubuntu.xenial:def:20162427000
    V
    		CVE-2016-2427 on Ubuntu 16.04 LTS (xenial) - low.
    2016-04-17
    BACK
    bouncycastle legion-of-the-bouncy-castle-java-crytography-api 1.54
    google android 5.0
    google android 5.0.1
    google android 5.1
    google android 5.1.0
    google android 6.0
    google android 6.0.1
    google android 6.0.1
    ibm sterling b2b integrator 5.2.0.0
    ibm sterling b2b integrator 6.0.3.2