CVE-2024-12133

MEDIUMPre-NVD 5.35.3
EchelonGraph scoreMEDIUM confidence

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

Score 5.3 from GitHub Security Advisory (severity: MODERATE) published 2025-02-10. A secondary CVSS source baseline 5.3; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: EPSS, GitHub Security Advisory, a secondary CVSS source

Also known asEUVD-2024-50622 (ENISA EUVD) · GHSA-j3qr-8f3v-fgjj (GitHub Security Advisories)Source: ENISA EUVD

5.3EG
EchelonGraph verdictMonitorRemediate within your standard update timelines at low or medium mission impact and sooner than that at high (the SSVC decision on this page).
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 1.1%CVSS: 5.3Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

A flaw in libtasn1 causes inefficient handling of specific certificate data. When processing a large number of elements in a certificate, libtasn1 takes much longer than expected, which can slow down or even crash the system. This flaw allows an attacker to send a specially crafted certificate, causing a denial of service attack.

CVSS v3
5.3
EG Score
5.3MEDIUMmedium confidence
EG Risk
39
EG Risk 39/100

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)
Severity53% × 45%
Impact severity (EG Severity): CVSS 5.3 of 10. Never the KEV-floored or EPSS-lifted EG Score.
Exploitation1.1% × 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 partial (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
1.1%
EPSS %ILE
66th
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 (5.3): severity, escalated by confirmed exploitation. This CVE's 5.3 is its impact severity (EG Severity), not escalated.

EG Severity
5.3 MEDIUMCVSS-B, impact only: no KEV listing, EPSS or EG-KEV tier raises it.GitHub Security Advisory CVSS
EG Likelihood
1.1% within 30 daysSource: FIRST EPSS (model v2026.06.15, score date 2026-11-04). 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: 14 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 partial (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)14 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 partial (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

February 10, 2025

Last Modified

November 5, 2026

Advisory Details (10)

Auto-updated Jun 26, 2026
Patch available. Sources: redhat.
Web page

oss-security - Fwd: libtasn1-4.20.0 released [fixes CVE-2024-12133]

http://www.openwall.com/lists/oss-security/2025/02/06/6
Web page

Parsing a certificate containing numerous names or name constraints leads to a DoS attack (#52) · Issues · gnutls / libtasn1 · GitLab

https://gitlab.com/gnutls/libtasn1/-/issues/52
Web page

doc/security/CVE-2024-12133.md · master · gnutls / libtasn1 · GitLab

https://gitlab.com/gnutls/libtasn1/-/blob/master/doc/security/CVE-2024-12133.md
Red HatMentions a patch (unverified)

2344611 – (CVE-2024-12133) CVE-2024-12133 libtasn1: Inefficient DER Decoding in libtasn1 Leading to Potential Remote DoS

Affected: Red Hat Enterprise Linux 8

https://bugzilla.redhat.com/show_bug.cgi?id=2344611
Red HatMentions a patch (unverified)

cve-details

https://access.redhat.com/security/cve/CVE-2024-12133
Red HatMentions a patch (unverified)
https://access.redhat.com/errata/RHSA-2025:8385
Red HatMentions a patch (unverified)

Affected: Red Hat Enterprise Linux 9.4 Extended Update Support.

https://access.redhat.com/errata/RHSA-2025:8021
Red HatMentions a patch (unverified)

Affected: Red Hat Enterprise Linux 9.

https://access.redhat.com/errata/RHSA-2025:7077
Red HatMentions a patch (unverified)

Affected: Red Hat Enterprise Linux 8.

https://access.redhat.com/errata/RHSA-2025:4049
Red HatMentions a patch (unverified)

Affected: Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions.

https://access.redhat.com/errata/RHSA-2025:17347

Patch Availability(10)

Vendor / EcosystemFix (by version range) / PatchReleasedSource
ubuntulibtasn1-doc (4.18.0-4ubuntu0.1) @ jammy2026-10-22ubuntu
ubuntulibtasn1-doc (4.19.0-3ubuntu0.24.04.1) @ noble2026-10-22ubuntu
redhatlibtasn1-0:4.13-4.el8_8.12026-06-29redhat
redhatlibtasn1-0:4.13-3.el8_6.22026-06-29redhat
redhatlibtasn1-0:4.13-3.el8_4.12026-06-29redhat
redhatlibtasn1-0:4.16.0-8.el9_2.12025-10-06redhat
redhatdiscovery/discovery-ui-rhel9:1.14.2-17484676192025-06-02redhat
redhatlibtasn1-0:4.16.0-8.el9_4.12025-05-20redhat
redhatlibtasn1-0:4.16.0-9.el92025-05-13redhat
redhatlibtasn1-0:4.13-5.el8_102025-04-23redhat

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

(11 across 11 ecosystems)
Alpine:v3.18(1)
PackageVulnerable rangeFix by version rangeDependents
libtasn1—
  • every version up to 4.20.0-r0: fixed in 4.20.0-r0
—
Alpine:v3.19(1)
PackageVulnerable rangeFix by version rangeDependents
libtasn1—
  • every version up to 4.20.0-r0: fixed in 4.20.0-r0
—
Alpine:v3.20(1)
PackageVulnerable rangeFix by version rangeDependents
libtasn1—
  • every version up to 4.20.0-r0: fixed in 4.20.0-r0
—
Alpine:v3.21(1)
PackageVulnerable rangeFix by version rangeDependents
libtasn1—
  • every version up to 4.20.0-r0: fixed in 4.20.0-r0
—
Alpine:v3.22(1)
PackageVulnerable rangeFix by version rangeDependents
libtasn1—
  • every version up to 4.20.0-r0: fixed in 4.20.0-r0
—
Alpine:v3.23(1)
PackageVulnerable rangeFix by version rangeDependents
libtasn1—
  • every version up to 4.20.0-r0: fixed in 4.20.0-r0
—
Alpine:v3.24(1)
PackageVulnerable rangeFix by version rangeDependents
libtasn1—
  • every version up to 4.20.0-r0: fixed in 4.20.0-r0
—
Debian:11(1)
PackageVulnerable rangeFix by version rangeDependents
libtasn1-64.16.0-2, 4.16.0-2+deb11u1
  • every version up to 4.16.0-2+deb11u2: fixed in 4.16.0-2+deb11u2
—
Debian:12(1)
PackageVulnerable rangeFix by version rangeDependents
libtasn1-64.19.0-2
  • every version up to 4.19.0-2+deb12u1: fixed in 4.19.0-2+deb12u1
—
Debian:13(1)
PackageVulnerable rangeFix by version rangeDependents
libtasn1-6—
  • every version up to 4.20.0-1: fixed in 4.20.0-1
—
Debian:14(1)
PackageVulnerable rangeFix by version rangeDependents
libtasn1-6—
  • every version up to 4.20.0-1: fixed in 4.20.0-1
—

Weakness Classification(1)

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

Additional Vendor Advisories

(2)

Vendors that published advisories for this CVE beyond the curated set above. Broader coverage but minimal per-row detail — click through for the original advisory.

Data Freshness Timeline

(refreshed 7× in last 7d / 48× 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 275 rows on record for this CVE, as 96 entries (4 repeats 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. 4 repeat rows among the latest 100 are merged into the row they repeat. The 175 oldest rows on record are not shown and were not checked, so the counts can still include repeats.

  1. 2026-11-13 16:46 UTCEPSS rescoreEPSS 1.1% · 66th percentile
  2. 2026-11-12 16:30 UTCEPSS rescoreEPSS 1.1% · 66th percentile
  3. 2026-11-11 16:34 UTCEPSS rescoreEPSS 1.1% · 66th percentile
  4. 2026-11-10 16:38 UTCEPSS rescoreEPSS 1.1% · 66th percentile
  5. 2026-11-09 16:30 UTCEPSS rescoreEPSS 1.1% · 66th percentile
  6. 2026-11-08 16:35 UTCEPSS rescoreEPSS 1.1% · 66th percentile
  7. 2026-11-07 16:35 UTCEPSS rescoreEPSS 1.1% · 66th percentile
  8. 2026-11-06 16:31 UTCEPSS rescoreEPSS 1.1% · 66th percentile
  9. 2026-11-05 16:33 UTCEPSS rescoreEPSS 1.1% · 66th percentile
  10. 2026-11-05 12:27 UTCEchelonGraph re-scored
  11. 2026-11-05 12:27 UTCVendor advisory
  12. 2026-11-05 12:27 UTCGHSA enrichmentGHSA-j3qr-8f3v-fgjj · GitHub severity MODERATE · GitHub CVSS 5.3
  13. 2026-11-05 11:54 UTCEchelonGraph re-scored
  14. 2026-11-05 11:54 UTCVendor advisory
  15. 2026-11-05 11:54 UTCGHSA enrichmentGHSA-j3qr-8f3v-fgjj · GitHub severity MODERATE · GitHub CVSS 5.3
  16. 2026-11-04 16:32 UTCEPSS rescoreEPSS 1.1% · 66th percentile
  17. 2026-11-03 16:41 UTCEPSS rescoreEPSS 1.1% · 65th percentile
  18. 2026-11-02 16:40 UTCEPSS rescoreEPSS 1.1% · 65th percentile
  19. 2026-10-31 16:30 UTCEPSS rescoreEPSS 1.1% · 65th percentile
  20. 2026-10-30 16:31 UTCEPSS rescoreEPSS 1.1% · 65th percentile
  21. 2026-10-30 12:25 UTCOSV refresh
  22. 2026-10-29 16:30 UTCEPSS rescoreEPSS 1.1% · 65th percentile
  23. 2026-10-28 16:29 UTCEPSS rescoreEPSS 1.1% · 65th percentile
  24. 2026-10-27 16:29 UTCEPSS rescoreEPSS 1.1% · 65th percentile
  25. 2026-10-26 16:29 UTCEPSS rescoreEPSS 1.1% · 65th percentile
Show 71 more
  1. 2026-10-25 17:22 UTCEchelonGraph re-scored
  2. 2026-10-25 16:30 UTCEPSS rescoreEPSS 1.1% · 65th percentile
  3. 2026-10-24 16:30 UTCEPSS rescoreEPSS 1.1% · 65th percentile
  4. 2026-10-23 16:29 UTCEPSS rescoreEPSS 1.1% · 65th percentile
  5. 2026-10-22 22:29 UTCEchelonGraph re-scored
  6. 2026-10-22 22:29 UTCVendor advisory
  7. 2026-10-22 22:29 UTCGHSA enrichmentGHSA-j3qr-8f3v-fgjj · GitHub CVSS 5.3
  8. 2026-10-22 21:30 UTCEchelonGraph re-scored
  9. 2026-10-22 21:30 UTCVendor advisory
  10. 2026-10-22 21:30 UTCGHSA enrichmentGHSA-j3qr-8f3v-fgjj · GitHub CVSS 5.3
  11. 2026-10-22 16:31 UTCEPSS rescoreEPSS 1.1% · 65th percentile
  12. 2026-10-21 21:34 UTCEchelonGraph re-scored
  13. 2026-10-21 21:34 UTCVendor advisory
  14. 2026-10-21 21:34 UTCGHSA enrichmentGHSA-j3qr-8f3v-fgjj · GitHub CVSS 5.3
  15. 2026-10-21 20:26 UTCEchelonGraph re-scored
  16. 2026-10-21 20:26 UTCVendor advisory
  17. 2026-10-21 20:26 UTCGHSA enrichmentGHSA-j3qr-8f3v-fgjj · GitHub CVSS 5.3
  18. 2026-10-21 17:28 UTCEchelonGraph re-scored
  19. 2026-10-21 17:28 UTCVendor advisory
  20. 2026-10-21 17:27 UTCGHSA enrichmentGHSA-j3qr-8f3v-fgjj · GitHub CVSS 5.3
  21. 2026-10-21 16:30 UTCEchelonGraph re-scored
  22. 2026-10-21 16:30 UTCVendor advisory
  23. 2026-10-21 16:30 UTCGHSA enrichmentGHSA-j3qr-8f3v-fgjj · GitHub CVSS 5.3
  24. 2026-10-21 16:29 UTCEPSS rescoreEPSS 1.1% · 65th percentile
  25. 2026-10-20 16:30 UTCEPSS rescoreEPSS 1.1% · 65th percentile
  26. 2026-10-19 16:29 UTCEPSS rescoreEPSS 1.1% · 65th percentile
  27. 2026-10-18 16:29 UTCEPSS rescoreEPSS 1.1% · 65th percentile
  28. 2026-10-18 07:34 UTCEchelonGraph re-scored
  29. 2026-10-17 16:30 UTCEPSS rescoreEPSS 1.1% · 65th percentile
  30. 2026-10-16 16:36 UTCEPSS rescoreEPSS 1.1% · 65th percentile
  31. 2026-10-15 16:29 UTCEPSS rescoreEPSS 1.1% · 65th percentile
  32. 2026-10-15 01:21 UTCEchelonGraph re-scored
  33. 2026-10-15 01:21 UTCVendor advisory
  34. 2026-10-15 01:21 UTCGHSA enrichmentGHSA-j3qr-8f3v-fgjj · GitHub CVSS 5.3
  35. 2026-10-14 16:30 UTCEPSS rescoreEPSS 1.1% · 65th percentile
  36. 2026-10-13 16:30 UTCEPSS rescoreEPSS 1.1% · 65th percentile
  37. 2026-10-12 18:07 UTCEchelonGraph re-scored
  38. 2026-10-12 16:31 UTCEPSS rescoreEPSS 1.1% · 65th percentile
  39. 2026-10-11 21:32 UTCEchelonGraph re-scored
  40. 2026-10-11 13:45 UTCEPSS rescoreEPSS 1.1% · 64th percentile
  41. 2026-10-10 19:58 UTCEPSS rescoreEPSS 1.1% · 64th percentile
  42. 2026-10-09 20:05 UTCEPSS rescoreEPSS 1.1% · 64th percentile
  43. 2026-10-08 17:07 UTCEPSS rescoreEPSS 1.1% · 64th percentile
  44. 2026-10-07 23:46 UTCEPSS rescoreEPSS 1.1% · 64th percentile
  45. 2026-10-07 00:54 UTCOSV refresh
  46. 2026-10-06 15:15 UTCEPSS rescoreEPSS 1.1% · 64th percentile
  47. 2026-10-05 17:41 UTCEPSS rescoreEPSS 1.1% · 64th percentile
  48. 2026-10-04 23:20 UTCEPSS rescoreEPSS 1.1% · 64th percentile
  49. 2026-10-03 14:23 UTCEPSS rescoreEPSS 1.1% · 64th percentile
  50. 2026-10-01 19:48 UTCEPSS rescoreEPSS 1.1% · 64th percentile
  51. 2026-09-30 16:43 UTCEchelonGraph re-scored
  52. 2026-09-30 15:01 UTCEPSS rescoreEPSS 1.1% · 64th percentile
  53. 2026-09-29 15:17 UTCEPSS rescoreEPSS 1.1% · 64th percentile
  54. 2026-09-28 13:49 UTCEPSS rescoreEPSS 1.1% · 64th percentile
  55. 2026-09-27 13:43 UTCEPSS rescoreEPSS 1.1% · 64th percentile
  56. 2026-09-26 00:23 UTCEPSS rescoreEPSS 1.1% · 64th percentile
  57. 2026-09-24 14:01 UTCEPSS rescoreEPSS 1.1% · 64th percentile
  58. 2026-09-23 13:46 UTCEPSS rescoreEPSS 1.1% · 64th percentile
  59. 2026-09-22 14:46 UTCEPSS rescoreEPSS 1.1% · 64th percentile
  60. 2026-09-20 20:14 UTCEPSS rescoreEPSS 1.1% · 64th percentile
  61. 2026-09-19 15:40 UTCEPSS rescoreEPSS 1.1% · 64th percentile
  62. 2026-09-18 19:26 UTCEPSS rescoreEPSS 1.1% · 64th percentile
  63. 2026-09-17 06:36 UTCOSV refresh
  64. 2026-09-16 14:06 UTCEPSS rescoreEPSS 1.1% · 64th percentile
  65. 2026-09-16 05:11 UTCEPSS rescoreEPSS 1.1% · 64th percentile
  66. 2026-09-15 03:08 UTCEPSS rescoreEPSS 1.1% · 64th percentile
  67. 2026-09-11 14:51 UTCEPSS rescoreEPSS 1.1% · 63rd percentile
  68. 2026-09-11 09:34 UTCEPSS rescoreEPSS 1.1% · 63rd percentile
  69. 2026-09-08 21:58 UTCEPSS rescoreEPSS 1.1% · 63rd percentile
  70. 2026-09-07 15:59 UTCEPSS rescoreEPSS 1.1% · 63rd percentile
  71. 2026-09-06 13:46 UTCEPSS rescoreEPSS 1.1% · 63rd percentile

Frequently asked(5)

What is CVE-2024-12133?
CVE-2024-12133 is a medium-severity vulnerability; its CVE record was published on February 10, 2025. A flaw in libtasn1 causes inefficient handling of specific certificate data. When processing a large number of elements in a certificate, libtasn1 takes much longer than expected, which can slow down or even crash the system. This flaw allows an attacker to send a specially crafted certificate,…
When was CVE-2024-12133 made public?
CVE-2024-12133 was made public on February 10, 2025: that is the date its CVE record's CNA, Red Hat, Inc., gives for when the vulnerability was made public. The CVE record itself was published on February 10, 2025. EchelonGraph's copy of the record carries a last-modified date of November 5, 2026; the record at its source may have been updated since.
Is CVE-2024-12133 actively exploited?
CVE-2024-12133 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 1.1% probability of exploitation in the next 30 days (66th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2024-12133?
CVE-2024-12133 has a CVSS base score of 5.3 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2024-12133?
A fix for CVE-2024-12133 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2024-12133 are linked in the Vendor Advisories panel on this page.

Dependency Blast Radius

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