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CVE-2017-13156

55
FAUCET Score

CVE-2017-13156 is an elevation of privilege vulnerability, dubbed "Janus," affecting the Android system (ART) across versions 5.1.1 through 8.0. This flaw allows for the modification of signed Android application packages (APKs) without invalidating their signatures. With a CVSS score of 7.8 (High), it presents a significant risk, as a local attacker can achieve high confidentiality, integrity, and availability impacts with low attack complexity and no user interaction. Exploit intelligence confirms the existence of a Metasploit module for this vulnerability, and it has garnered notable community discussion and media coverage, indicating its widespread recognition and potential for exploitation.

Impacted Technologies

VendorProductVersion(s)CPE
5.1.1CPE matchmatch criteria
cpe:2.3:o:google:android:5.1.1:*:*:*:*:*:*:*
6.0CPE matchmatch criteria
cpe:2.3:o:google:android:6.0:*:*:*:*:*:*:*
6.0.1CPE matchmatch criteria
cpe:2.3:o:google:android:6.0.1:*:*:*:*:*:*:*
7.0CPE matchmatch criteria
cpe:2.3:o:google:android:7.0:*:*:*:*:*:*:*
7.1.1CPE matchmatch criteria
cpe:2.3:o:google:android:7.1.1:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.0

7.8HIGH

CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
1.8
Impact Score
5.9
CvssVersion
3.0

Exploit Intelligence

EPSS Score
20.09%
Probability of exploitation in next 30 days
EPSS Percentile
97.2%
Percentile rank of EPSS score among Peer Group
As of 2026-07-28
Model: v2026.06.15
Metasploit: Android Janus APK Signature bypass · Jul 31, 2017
ExploitDB: EDB-47601 · Nov 8, 2019
This CVE's current EPSS score of 0.2009 is in the 99th percentile among its peer group of 17,070 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.2 Bluesky, 0.1 Mastodon, and 0.2 GitHub mentions.

Media Mentions

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (1)

googlepatch availablevia nvd_reference
View patch

References

packetstormsecurity.com / files/155189/Android-Janus-APK-Signature-Bypass.html
source.android.com / security/bulletin/2017-12-01
PatchVendor Advisory
securityfocus.com / bid/102109
Third Party AdvisoryVDB Entry