What is CVE-2013-4576?

CVE-2013-4576 is a vulnerability in Gnupg, classified under CWE-255. Published 2013-12-20.

Is CVE-2013-4576 known to be exploited?

1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

Vulnerability in Gnupg

CVE-2013-4576

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.

Published 2013-12-20 · last modified 2026-06-16.

CVSS v2 metric

CVSS v2 base score 2.1 (Low). Vector: AV:L/AC:L/Au:N/C:P/I:N/A:N. This CVE predates CVSS v3 and has no v3 score from NVD.

EPSS exploit prediction

EPSS: 0.005 (36.7th percentile), scored 2026-09-29.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 37th percentile — 36.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.005 · newest: 0.005 · change: 0.000

Affected products

Gnupg — versions 1.0.0, 1.0.1, 1.0.2

Weakness classification (CWE)

CWE-255

Public proof-of-concept exploits

revl-ca/scan-docker-image

References

www.securityfocus.com/bid/64424 (vdb-entry)
www.ubuntu.com/usn/USN-2059-1 (vendor-advisory)
osvdb.org/101170 (vdb-entry)
lists.gnupg.org/pipermail/gnupg-devel/2013-December/028102.html (Vendor Advisory, mailing-list, Patch)
rhn.redhat.com/errata/RHSA-2014-0016.html (vendor-advisory)
www.securitytracker.com/id/1029513 (vdb-entry)
exchange.xforce.ibmcloud.com/vulnerabilities/89846 (vdb-entry)
www.debian.org/security/2013/dsa-2821 (vendor-advisory)
www.tau.ac.il/~tromer/papers/acoustic-20131218.pdf
seclists.org/oss-sec/2013/q4/523 (mailing-list)

Frequently asked questions

What is CVE-2013-4576?: CVE-2013-4576 is a vulnerability in Gnupg, classified under CWE-255. Published 2013-12-20.
Is CVE-2013-4576 known to be exploited?: 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.