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Fencer Intel
high 7.7

CVE-2020-13822 json

Signature Malleabillity in elliptic

published 6y ago modified 4mo ago also GHSA-vh7m-p724-62c2 , EUVD-2020-0571

cvss
7.7
version 3.1, NVD
cisa kev
Not listed
not in CISA's catalog
epss
2.7%
EPSS 2.7% chance of exploitation in 30 days, percentile 86%
public exploits
0
none known

Summary

The Elliptic package 6.5.2 for Node.js allows ECDSA signature malleability via variations in encoding, leading '\0' bytes, or integer overflows. This could conceivably have a security-relevant impact if an application relied on a single canonical signature.

Patch / fix

  • npm elliptic 6.5.3
  • node-elliptic Debian 14, Debian 13, Debian 12 6.5.3~dfsg-1

debian advisories DEBIAN-CVE-2020-13822

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Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2020-13822 updated cvss 7.7

nodejs-elliptic: improper encoding checks allows a certain degree of signature malleability in ECDSA signatures

  • Red Hat OpenShift Service Mesh 1 servicemesh-grafana, servicemesh-grafana-prometheus
    affected: no fix available “Fix deferred”
  • Red Hat OpenShift Container Platform 4 prometheus-promu, openshift-prometheus-promu, golang-github-prometheus-promu
    affected: no fix available
  • Red Hat Quay 3 quay/quay-rhel8
    affected: no fix available “Fix deferred”
  • Red Hat OpenShift Container Platform 4.6 openshift4/ose-grafana v4.6.0-202010061132.p0, openshift4/ose-prometheus v4.6.0-202009290409.p0
    fixed: vendor fix RHSA-2020:4298
  • Red Hat Single Sign-On 7
    fixed: vendor fix RHSA-2020:5533
  • Red Hat OpenShift Container Platform 4.6 openshift4/ose-cli v4.6.0-202010080605.p0, openshift4/ose-ptp v4.6.0-202010200139.p0, openshift4/ose-etcd v4.6.0-202010061132.p0, openshift4/ose-tests v4.6.0-202010120952.p0, openshift4/ose-console v4.6.0-202010100121.p0, openshift4/ose-coredns v4.6.0-202010061132.p0, +78 more
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

Exploit prediction

2.71% chance of exploitation in the next 30 days, higher than 86% of all scored CVEs (FIRST EPSS, 2026-11-09).

Exploits and checks

  • github.com https://github.com/indutny/elliptic/issues/226 referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
NVD 3.1 7.7 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:L
NVD 2.0 6.8 AV:N/AC:M/Au:N/C:P/I:P/A:P
GitHub 3.1 7.7 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:L

Affected packages

ecosystem package affected fixed in
npm elliptic
<6.5.3
6.5.3

Classification

Weakness
  • CWE-190 Integer Overflow or Wraparound

References

Sources

Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.