#VU42223 Credentials management in GnuPG - CVE-2013-4576

Vulnerability identifier: #VU42223

Vulnerability risk: Low

CVSSv4.0: 1 [CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2013-4576

CWE-ID: CWE-255

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
GnuPG
Client/Desktop applications / Encryption software

Vendor: GNU

Description

The vulnerability allows a remote non-authenticated attacker to gain access to sensitive information.

GnuPG 1.x before 1.4.16 generates RSA keys using sequences of introductions with certain patterns that introduce a side channel, which allows physically proximate attackers to extract RSA keys via a chosen-ciphertext attack and acoustic cryptanalysis during decryption. NOTE: applications are not typically expected to protect themselves from acoustic side-channel attacks, since this is arguably the responsibility of the physical device. Accordingly, issues of this type would not normally receive a CVE identifier. However, for this issue, the developer has specified a security policy in which GnuPG should offer side-channel resistance, and developer-specified security-policy violations are within the scope of CVE.

Mitigation
Install update from vendor's website.

Vulnerable software versions

GnuPG: 1.0.0 - 1.4.14

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External links
https://lists.gnupg.org/pipermail/gnupg-devel/2013-December/028102.html
https://osvdb.org/101170
https://rhn.redhat.com/errata/RHSA-2014-0016.html
https://seclists.org/oss-sec/2013/q4/520
https://seclists.org/oss-sec/2013/q4/523
https://www.cs.tau.ac.il/~tromer/acoustic/
https://www.debian.org/security/2013/dsa-2821
https://www.securityfocus.com/bid/64424
https://www.securitytracker.com/id/1029513
https://www.tau.ac.il/~tromer/papers/acoustic-20131218.pdf
https://www.ubuntu.com/usn/USN-2059-1
https://exchange.xforce.ibmcloud.com/vulnerabilities/89846

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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.