Information disclosure in openssl (Alpine package)



Risk Low
Patch available YES
Number of vulnerabilities 1
CVE-ID CVE-2017-3732
CWE-ID CWE-310
Exploitation vector Network
Public exploit N/A
Vulnerable software
 openssl (Alpine package)
Operating systems & Components / Operating system package or component

Vendor Alpine Linux Development Team

Security Bulletin

This security bulletin contains one low risk vulnerability.

1) Information disclosure

EUVDB-ID: #VU5442

Risk: Low

CVSSv4.0: 1.7 [CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2017-3732

CWE-ID: CWE-310 - Cryptographic Issues

Exploit availability: No

Description

The vulnerability allows a remote attacker to gain access to potentially sensitive information.

The vulnerability exists due to propagating error in the x86_64 Montgomery squaring procedure. A remote attacker with access to unpatched vulnerable system that uses a shared private key with Diffie-Hellman (DH) parameters set can gain unauthorized access to sensitive private key information.

According to vendor’s advisory, this vulnerability is unlikely to be exploited in real-world attacks, as it requires significant resources and online access to an unpatched system using the target private key in a scenario with persistent DH parameters and a private key that is shared between multiple clients.

Vulnerability exploitation against RSA and DSA as a result of this defect would be very difficult to perform and are not believed likely.

Mitigation

Install update from vendor's website.

Vulnerable software versions

openssl (Alpine package): 1.0.2c-r0 - 1.0.2j-r2

CPE2.3 External links

https://git.alpinelinux.org/aports/commit/?id=3eb2d51b3b6d1670a7763dddd331789b32fc36ad
https://git.alpinelinux.org/aports/commit/?id=a84acb79718101fdfd08d8fd21c5b8ce30cb6531
https://git.alpinelinux.org/aports/commit/?id=f8bf827fae4885976509355d07182af03796ddda


Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.



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