CVE-2022-24884

CRITICALNVD 10.010.0
EchelonGraph scoreMEDIUM confidence

“—” beside the score: it is equal to NVD's CVSS score.

This critical-severity CVE scores 10.0 under NVD CVSS v3. EPSS exploit probability: 1.0% (64th percentile of EPSS-scored CVEs). No GitHub Security Advisory CVSS is on record for this CVE.

Triggered by: Headline CVSS from NVD CVSS v3
Sources: EPSS, NVD CVSS v3

Also known asEUVD-2022-29652 (ENISA EUVD)Source: ENISA EUVD

10.0EG
EchelonGraph verdictPlan a fixRemediate within your standard update timelines at low or medium mission impact and sooner than that at high (the SSVC decision on this page).
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 1.0%CVSS: 10.0Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

ecdsautils is a tiny collection of programs used for ECDSA (keygen, sign, verify). ecdsa_verify_[prepare_]legacy() does not check whether the signature values r and s are non-zero. A signature consisting only of zeroes is always considered valid, making it trivial to forge signatures. Requiring multiple signatures from different public keys does not mitigate the issue: ecdsa_verify_list_legacy() will accept an arbitrary number of such forged signatures. Both the ecdsautil verify CLI command and the libecdsautil library are affected. The issue has been fixed in ecdsautils 0.4.1. All older versions of ecdsautils (including versions before the split into a library and a CLI utility) are vulnerable.

CVSS v3
10.0
EG Score
10.0CRITICALmedium confidence
EG Risk
60
EG Risk 60/100

EG Risk is EchelonGraph's 0–100 priority score. It fuses impact severity (EG Severity, the CVSS base score, never the KEV-floored or EPSS-lifted EG Score) with real-world exploitation and automatability, under weights EchelonGraph set by hand, so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner.

How it’s computed (value × EchelonGraph’s weight)
Severity100% × 45%
Impact severity (EG Severity): CVSS 10.0 of 10. Never the KEV-floored or EPSS-lifted EG Score.
Exploitation1.0% × 40%
FIRST EPSS: the 30-day exploitation probability when EchelonGraph scored this CVE.
Automatability100% × 15%
CISA's SSVC Automatable value: yes (Vulnrichment).
SSVC (CISA's decision table, applied by EchelonGraph): Track at low or medium mission impact; Attend at high (mission-essential systems).
Exploitation none (CISA Vulnrichment) · Automatable yes (CISA Vulnrichment) · Technical impact total (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE.
Action: A fix is available. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high.
EPSS PROB
1.0%
EPSS %ILE
64th
KEV
Not listed

What the EG score is made of (scorer v4.0: the three questions the 0–10 score mixes, published apart · methodology)

The EG score (10.0): severity, escalated by confirmed exploitation. This CVE's 10.0 is its impact severity (EG Severity), not escalated.

EG Severity
10.0 CRITICALCVSS-B, impact only: no KEV listing, EPSS or EG-KEV tier raises it.NVD CVSS v3 · CVSS v3.0 or v3.1
EG Likelihood
1.0% within 30 daysSource: FIRST EPSS (model v2026.06.15, score date 2026-11-11). FIRST's exploitation probability, not an EchelonGraph model.
Confirmed exploitation
None on record (CISA KEV, EG-KEV Tier 1)Reported apart from the likelihood: an observed fact, not a probability.
EG Priority
SSVC Track at medium mission impactTrack at low or medium mission impact; Attend at high (mission-essential systems).CISA BOD 26-04: 3 days if the affected system is publicly exposed; 60 days if it is not.Each input and its source, and whom BOD 26-04 binds: the SSVC and BOD 26-04 blocks below.

SSVC (CISA's decision table, applied by EchelonGraph)Track at low or medium mission impact; Attend at high (mission-essential systems).

A fix is available. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high.

Exploitation none (CISA Vulnrichment) · Automatable yes (CISA Vulnrichment) · Technical impact total (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE. Mission impact is CISA's Mission & Well-being decision point, and only you can judge it. CISA's table makes it high when Mission Prevalence is Essential — the vulnerable component "directly provides capabilities that constitute at least one MEF for at least one entity" (MEF: mission essential function) — or when Public Well-Being Impact is Irreversible: "multiple fatalities are likely", the cyber-physical system "is likely lost or destroyed", "extreme or serious externalities" are imposed on other parties, or social systems such as elections or the financial grid "are destabilized and potentially collapse". CISA's decision table

BOD 26-04 (CISA's remediation timeline, Table 1)3 days if the affected system is publicly exposed; 60 days if it is not.

The score's inputs: In CISA KEV no (CISA's KEV catalog) · Automatable yes (CISA Vulnrichment) · Technical impact total (CISA Vulnrichment). Whether your system is publicly exposed is yours to answer. BOD 26-04 binds US Federal Civilian Executive Branch agencies; for anyone else it is CISA's published timeline, a reference rather than an obligation. The directive · how EchelonGraph applies it

Published

May 6, 2022

Last Modified

November 21, 2024

Advisory Details (8)

Auto-updated Nov 8, 2026
Patch available. Sources: github, github_commit.
GitHub commit

commit 39b6d0a77414 (freifunk-gluon/ecdsautils)

Fix landed in freifunk-gluon/ecdsautils commit 39b6d0a77414 — awaiting tagged release

https://github.com/freifunk-gluon/ecdsautils/commit/39b6d0a77414fd41614953a0e185c4eefa2f88ad
GitHub commit

commit 1d4b091abdf1 (freifunk-gluon/ecdsautils)

Fix landed in freifunk-gluon/ecdsautils commit 1d4b091abdf1 — awaiting tagged release

https://github.com/freifunk-gluon/ecdsautils/commit/1d4b091abdf15ad7b2312535b5b95ad70f6dbd08
Web page

[SECURITY] [DSA 5132-1] ecdsautils security update

https://www.debian.org/security/2022/dsa-5132
Web page

[SECURITY] Fedora 34 Update: ecdsautils-0.4.1-1.fc34 - package-announce - Fedora mailing-lists

https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/L7UBR3M4U3LA46BHXYSH7EN5GDG44GK7/
Web page

[SECURITY] Fedora 36 Update: ecdsautils-0.4.1-1.fc36 - package-announce - Fedora mailing-lists

https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/G2JT57AAFIEL7JDO2ZBV25JKYME5NU54/
Web page

[SECURITY] Fedora 35 Update: ecdsautils-0.4.1-1.fc35 - package-announce - Fedora mailing-lists

https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/4AKQH5WCBMJA3ODCSNERY6HVX4BX3ITG/
Web pageMentions a patch (unverified)

[SECURITY] [DLA 2997-1] ecdsautils security update

https://lists.debian.org/debian-lts-announce/2022/05/msg00007.html
GitHub advisoryMentions a patch (unverified)

Improper Verification of ECDSA Signatures · Advisory · freifunk-gluon/ecdsautils · GitHub

https://github.com/freifunk-gluon/ecdsautils/security/advisories/GHSA-qhcg-9ffp-78pw

Patch Availability(1)

Vendor / EcosystemFix (by version range) / PatchReleasedSource
ubuntuecdsautils (0.3.2+git20151018-2+deb10u1build0.22.04.1) @ jammy2026-11-12ubuntu

Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.

Affected Packages

(6 across 6 ecosystems)
Debian:10(1)
PackageVulnerable rangeFix by version rangeDependents
ecdsautils0.3.2+git20151018-2
  • every version up to 0.3.2+git20151018-2+deb10u1: fixed in 0.3.2+git20151018-2+deb10u1
—
Debian:11(1)
PackageVulnerable rangeFix by version rangeDependents
ecdsautils0.3.2+git20151018-2
  • every version up to 0.3.2+git20151018-2+deb11u1: fixed in 0.3.2+git20151018-2+deb11u1
—
Debian:12(1)
PackageVulnerable rangeFix by version rangeDependents
ecdsautils—
  • every version up to 0.4.1-1: fixed in 0.4.1-1
—
Debian:13(1)
PackageVulnerable rangeFix by version rangeDependents
ecdsautils—
  • every version up to 0.4.1-1: fixed in 0.4.1-1
—
Debian:14(1)
PackageVulnerable rangeFix by version rangeDependents
ecdsautils—
  • every version up to 0.4.1-1: fixed in 0.4.1-1
—
Debian:9(1)
PackageVulnerable rangeFix by version rangeDependents
ecdsautils0.3.2+git20151018-2
  • every version up to 0.3.2+git20151018-2+deb9u1: fixed in 0.3.2+git20151018-2+deb9u1
—

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

All Vendor Advisories

(1)

Every vendor that published an advisory referencing this CVE — pulled from our cve_vendor_advisories aggregation. Click any row for the vendor's original advisory page.

Data Freshness Timeline

(refreshed 8× in last 7d / 44× in last 30d)

Each row is a time one of our pipelines fetched, updated or re-scored this CVE. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed its CVE.org record (CNA or CISA ADP). An arrow marks a change the record states ("CVSS v3 → 9.1"); EPSS and GHSA rows show the values recorded at that time, not what changed (EPSS values are rounded; hover one for the exact figures). "EchelonGraph re-scored" is our own recompute of this CVE's score, not an update from a source, and is not counted in the refreshes above. Most recent first.

Showing the most recent 100 of 251 rows on record for this CVE, as 99 entries (1 repeat merged).

A repeat, a row identical to one the same pipeline wrote less than 10 seconds earlier, is not a separate refresh and is not counted. 1 repeat row among the latest 100 is merged into the row it repeats. The 151 oldest rows on record are not shown and were not checked, so the counts can still include repeats.

  1. 2026-11-13 16:41 UTCEPSS rescoreEPSS 1.0% · 64th percentile
  2. 2026-11-12 16:29 UTCEPSS rescoreEPSS 1.0% · 64th percentile
  3. 2026-11-12 15:38 UTCEchelonGraph re-scored
  4. 2026-11-12 15:38 UTCVendor advisory
  5. 2026-11-11 16:32 UTCEPSS rescoreEPSS 1.0% · 64th percentile
  6. 2026-11-11 13:29 UTCEchelonGraph re-scored
  7. 2026-11-10 16:35 UTCEPSS rescoreEPSS 1.0% · 64th percentile
  8. 2026-11-10 11:19 UTCEchelonGraph re-scored
  9. 2026-11-09 16:29 UTCEPSS rescoreEPSS 1.0% · 64th percentile
  10. 2026-11-09 09:10 UTCEchelonGraph re-scored
  11. 2026-11-08 16:33 UTCEPSS rescoreEPSS 1.0% · 64th percentile
  12. 2026-11-08 07:01 UTCEchelonGraph re-scored
  13. 2026-11-07 16:34 UTCEPSS rescoreEPSS 1.0% · 64th percentile
  14. 2026-11-07 04:52 UTCEchelonGraph re-scored
  15. 2026-11-06 16:30 UTCEPSS rescoreEPSS 1.0% · 64th percentile
  16. 2026-11-06 02:43 UTCEchelonGraph re-scored
  17. 2026-11-05 16:31 UTCEPSS rescoreEPSS 1.0% · 64th percentile
  18. 2026-11-05 00:34 UTCEchelonGraph re-scored
  19. 2026-11-04 16:30 UTCEPSS rescoreEPSS 1.0% · 64th percentile
  20. 2026-11-04 00:25 UTCOSV refresh
  21. 2026-11-03 22:24 UTCEchelonGraph re-scored
  22. 2026-11-03 16:39 UTCEPSS rescoreEPSS 1.0% · 64th percentile
  23. 2026-11-02 20:13 UTCEchelonGraph re-scored
  24. 2026-11-02 20:13 UTCVendor advisory
  25. 2026-11-02 16:38 UTCEPSS rescoreEPSS 1.0% · 63rd percentile
Show 74 more
  1. 2026-11-01 18:01 UTCEchelonGraph re-scored
  2. 2026-11-01 16:30 UTCEPSS rescoreEPSS 1.0% · 63rd percentile
  3. 2026-10-31 16:29 UTCEPSS rescoreEPSS 1.0% · 63rd percentile
  4. 2026-10-31 15:53 UTCEchelonGraph re-scored
  5. 2026-10-31 15:53 UTCVendor advisory
  6. 2026-10-30 16:30 UTCEPSS rescoreEPSS 1.0% · 63rd percentile
  7. 2026-10-30 13:43 UTCEchelonGraph re-scored
  8. 2026-10-30 13:43 UTCVendor advisory
  9. 2026-10-29 16:29 UTCEPSS rescoreEPSS 1.0% · 63rd percentile
  10. 2026-10-29 11:17 UTCEchelonGraph re-scored
  11. 2026-10-29 11:17 UTCVendor advisory
  12. 2026-10-28 16:28 UTCEPSS rescoreEPSS 1.0% · 63rd percentile
  13. 2026-10-28 09:06 UTCEchelonGraph re-scored
  14. 2026-10-28 09:06 UTCVendor advisory
  15. 2026-10-27 16:28 UTCEPSS rescoreEPSS 1.0% · 63rd percentile
  16. 2026-10-27 06:22 UTCEchelonGraph re-scored
  17. 2026-10-27 06:22 UTCVendor advisory
  18. 2026-10-26 16:28 UTCEPSS rescoreEPSS 1.0% · 63rd percentile
  19. 2026-10-26 00:14 UTCVendor advisory
  20. 2026-10-25 18:12 UTCEchelonGraph re-scored
  21. 2026-10-25 16:29 UTCEPSS rescoreEPSS 1.0% · 63rd percentile
  22. 2026-10-24 22:06 UTCEchelonGraph re-scored
  23. 2026-10-24 22:06 UTCVendor advisory
  24. 2026-10-24 16:29 UTCEPSS rescoreEPSS 1.0% · 63rd percentile
  25. 2026-10-23 19:53 UTCEchelonGraph re-scored
  26. 2026-10-23 19:53 UTCVendor advisory
  27. 2026-10-23 16:28 UTCEPSS rescoreEPSS 1.0% · 63rd percentile
  28. 2026-10-22 17:44 UTCEchelonGraph re-scored
  29. 2026-10-22 16:30 UTCEPSS rescoreEPSS 1.0% · 63rd percentile
  30. 2026-10-21 16:28 UTCEPSS rescoreEPSS 1.0% · 63rd percentile
  31. 2026-10-21 15:34 UTCEchelonGraph re-scored
  32. 2026-10-21 15:34 UTCVendor advisory
  33. 2026-10-20 16:29 UTCEPSS rescoreEPSS 1.0% · 63rd percentile
  34. 2026-10-20 13:22 UTCEchelonGraph re-scored
  35. 2026-10-20 13:22 UTCVendor advisory
  36. 2026-10-19 16:28 UTCEPSS rescoreEPSS 1.0% · 63rd percentile
  37. 2026-10-19 11:12 UTCEchelonGraph re-scored
  38. 2026-10-19 11:12 UTCVendor advisory
  39. 2026-10-18 16:28 UTCEPSS rescoreEPSS 1.0% · 63rd percentile
  40. 2026-10-18 08:24 UTCEchelonGraph re-scored
  41. 2026-10-17 16:29 UTCEPSS rescoreEPSS 1.0% · 63rd percentile
  42. 2026-10-17 06:14 UTCEchelonGraph re-scored
  43. 2026-10-16 16:34 UTCEPSS rescoreEPSS 1.0% · 63rd percentile
  44. 2026-10-16 04:03 UTCEchelonGraph re-scored
  45. 2026-10-15 16:28 UTCEPSS rescoreEPSS 1.0% · 63rd percentile
  46. 2026-10-15 00:59 UTCEchelonGraph re-scored
  47. 2026-10-14 16:29 UTCEPSS rescoreEPSS 1.0% · 63rd percentile
  48. 2026-10-13 22:13 UTCEchelonGraph re-scored
  49. 2026-10-13 16:29 UTCEPSS rescoreEPSS 1.0% · 63rd percentile
  50. 2026-10-12 18:56 UTCEchelonGraph re-scored
  51. 2026-10-12 16:30 UTCEPSS rescoreEPSS 1.0% · 63rd percentile
  52. 2026-10-11 23:24 UTCEchelonGraph re-scored
  53. 2026-10-11 13:44 UTCEPSS rescoreEPSS 1.0% · 62nd percentile
  54. 2026-10-10 19:56 UTCEPSS rescoreEPSS 1.0% · 62nd percentile
  55. 2026-10-09 20:04 UTCEPSS rescoreEPSS 1.0% · 62nd percentile
  56. 2026-10-08 16:40 UTCEPSS rescoreEPSS 1.0% · 62nd percentile
  57. 2026-10-07 23:45 UTCEPSS rescoreEPSS 1.0% · 62nd percentile
  58. 2026-10-06 15:14 UTCEPSS rescoreEPSS 1.0% · 62nd percentile
  59. 2026-10-05 17:40 UTCEPSS rescoreEPSS 1.0% · 62nd percentile
  60. 2026-10-04 23:19 UTCEPSS rescoreEPSS 1.0% · 62nd percentile
  61. 2026-10-03 14:22 UTCEPSS rescoreEPSS 1.0% · 62nd percentile
  62. 2026-09-30 15:51 UTCEchelonGraph re-scored
  63. 2026-09-30 15:00 UTCEPSS rescoreEPSS 1.0% · 62nd percentile
  64. 2026-09-29 15:15 UTCEPSS rescoreEPSS 1.0% · 62nd percentile
  65. 2026-09-28 13:48 UTCEPSS rescoreEPSS 1.0% · 62nd percentile
  66. 2026-09-27 13:41 UTCEPSS rescoreEPSS 1.0% · 62nd percentile
  67. 2026-09-26 00:22 UTCEPSS rescoreEPSS 1.0% · 62nd percentile
  68. 2026-09-24 23:14 UTCOSV refresh
  69. 2026-09-24 14:00 UTCEPSS rescoreEPSS 1.0% · 62nd percentile
  70. 2026-09-23 13:45 UTCEPSS rescoreEPSS 1.0% · 62nd percentile
  71. 2026-09-20 20:13 UTCEPSS rescoreEPSS 1.0% · 61st percentile
  72. 2026-09-17 19:23 UTCEPSS rescoreEPSS 1.0% · 61st percentile
  73. 2026-09-16 14:05 UTCEPSS rescoreEPSS 1.0% · 61st percentile
  74. 2026-09-15 03:06 UTCEPSS rescoreEPSS 1.0% · 61st percentile

Frequently asked(5)

What is CVE-2022-24884?
CVE-2022-24884 is a critical-severity vulnerability; its CVE record was published on May 6, 2022. ecdsautils is a tiny collection of programs used for ECDSA (keygen, sign, verify). ecdsa_verify_[prepare_]legacy() does not check whether the signature values r and s are non-zero. A signature consisting only of zeroes is always considered valid, making it trivial to forge signatures. Requiring…
When was the CVE record for CVE-2022-24884 published?
The CVE record for CVE-2022-24884 was published on May 6, 2022. That is the record's publication date; the vulnerability itself may have been made public earlier. EchelonGraph's copy of the record carries a last-modified date of November 21, 2024; the record at its source may have been updated since.
Is CVE-2022-24884 actively exploited?
CVE-2022-24884 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 1.0% probability of exploitation in the next 30 days (64th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2022-24884?
CVE-2022-24884 has a CVSS v3 base score of 10.0 (NVD).
How do I remediate CVE-2022-24884?
A fix for CVE-2022-24884 is available: update to the fixed version the vendor names in its advisory.

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