CVE-2017-2423 - Improper Verification of Cryptographic Signature

Severity

75%

Complexity

99%

Confidentiality

106%

An issue was discovered in certain Apple products. iOS before 10.3 is affected. macOS before 10.12.4 is affected. The issue involves the "Security" component. It allows remote attackers to bypass intended access restrictions by leveraging a successful result from a SecKeyRawVerify API call with an empty signature.

CVSS 3.0 Base Score 9.8. CVSS Attack Vector: network. CVSS Attack Complexity: low. CVSS Vector: (CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H).

CVSS 2.0 Base Score 7.5. CVSS Attack Vector: network. CVSS Attack Complexity: low. CVSS Vector: (AV:N/AC:L/Au:N/C:P/I:P/A:P).

Demo Examples

Improper Verification of Cryptographic Signature

CWE-347

In the following code, a JarFile object is created from a downloaded file.


               JarFile jf = new JarFile(f);

The JAR file that was potentially downloaded from an untrusted source is created without verifying the signature (if present). An alternate constructor that accepts a boolean verify parameter should be used instead.

Overview

First reported 7 years ago

2017-04-02 01:59:00

Last updated 5 years ago

2019-10-03 00:03:00

Affected Software

Apple Mac OS X

References

97147

Third Party Advisory, VDB Entry

1038138

https://support.apple.com/HT207615

Vendor Advisory

https://support.apple.com/HT207617