Gnutls: gnutls impacted by inefficient der decoding in libtasn1 leading to remote dos
Priority LOW 33CWE-407Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Denial of service
- Confidentiality · integrity · availability
- None · None · Low
- Fix status
- Partial Red Hat: 9 fixed, 3 without a fix
Attack profile from CVSS 3.1 · CNA. Fix status from CNA and Red Hat. Impact type from CWE-407.
Summary
A flaw was found in GnuTLS, which relies on libtasn1 for ASN.1 data processing. Due to an inefficient algorithm in libtasn1, decoding certain DER-encoded certificate data can take excessive time, leading to increased resource consumption. This flaw allows a remote attacker to send a specially crafted certificate, causing GnuTLS to become unresponsive or slow, resulting in a denial-of-service condition.
Why it matters now
Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.01292 70th percentileScored 2026-11-07
Fix Partial gnutls: 3.8.8, 3.8.9Red Hat: 5 advisoriesRed Hat: 9 fixed, 3 without a fix
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- Yes
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| — | gnutls | up to 3.6.16; 3.7.0 – 3.7.11; 3.8.0 to before 3.8.8 | 3.8.8, 3.8.9 | Patch available | CNA |
| Red Hat | Red Hat Enterprise Linux 8 | — | 3.6.16-8.el8_10.3 | Patch available | CNA |
| Red Hat | Red Hat Enterprise Linux 8 | — | 3.6.16-8.el8_10.3 | Patch available | CNA |
| Red Hat | Red Hat Enterprise Linux 9 | — | 3.8.3-6.el9 | Patch available | CNA |
| Red Hat | Red Hat Enterprise Linux 9 | — | 3.8.3-6.el9 | Patch available | CNA |
| Red Hat | Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions | — | 3.7.6-21.el9_2.4 | Patch available | CNA |
| Red Hat | Red Hat Enterprise Linux 9.4 Extended Update Support | — | 3.8.3-4.el9_4.2 | Patch available | CNA |
| Red Hat | Red Hat Discovery 1.14 | — | 1.14.3-1748529279 | Patch available | CNA |
| Red Hat | Red Hat Discovery 1.14 | — | 1.14.2-1748467619 | Patch available | CNA |
| Red Hat | Red Hat Enterprise Linux 10 | — | — | Not affected | CNA |
| Red Hat | Red Hat Enterprise Linux 6 | — | — | No fix listed | CNA |
| Red Hat | Red Hat Enterprise Linux 7 | — | — | No fix listed | CNA |
| Red Hat | Red Hat OpenShift Container Platform 4 | — | — | No fix listed | CNA |
- gnutls Vendor— Affected up to 3.6.16; 3.7.0 – 3.7.11; 3.8.0 to before 3.8.8 Fixed in 3.8.8, 3.8.9 Patch available CNA
- Red Hat Enterprise Linux 8 VendorRed Hat Affected — Fixed in 3.6.16-8.el8_10.3 Patch available CNA
- Red Hat Enterprise Linux 8 VendorRed Hat Affected — Fixed in 3.6.16-8.el8_10.3 Patch available CNA
- Red Hat Enterprise Linux 9 VendorRed Hat Affected — Fixed in 3.8.3-6.el9 Patch available CNA
- Red Hat Enterprise Linux 9 VendorRed Hat Affected — Fixed in 3.8.3-6.el9 Patch available CNA
- Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions VendorRed Hat Affected — Fixed in 3.7.6-21.el9_2.4 Patch available CNA
- Red Hat Enterprise Linux 9.4 Extended Update Support VendorRed Hat Affected — Fixed in 3.8.3-4.el9_4.2 Patch available CNA
- Red Hat Discovery 1.14 VendorRed Hat Affected — Fixed in 1.14.3-1748529279 Patch available CNA
- Red Hat Discovery 1.14 VendorRed Hat Affected — Fixed in 1.14.2-1748467619 Patch available CNA
- Red Hat Enterprise Linux 10 VendorRed Hat Affected — Fixed in — Not affected CNA
- Red Hat Enterprise Linux 6 VendorRed Hat Affected — Fixed in — No fix listed CNA
- Red Hat Enterprise Linux 7 VendorRed Hat Affected — Fixed in — No fix listed CNA
- Red Hat OpenShift Container Platform 4 VendorRed Hat Affected — Fixed in — No fix listed CNA
CPE names CNA · 13
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:/a:redhat:enterprise_linux:8::appstream | 8 | — | Red Hat |
| cpe:/o:redhat:enterprise_linux:8::baseos | 8 | — | Red Hat |
| cpe:/a:redhat:enterprise_linux:9::appstream | 9 | — | Red Hat |
| cpe:/o:redhat:enterprise_linux:9::baseos | 9 | — | Red Hat |
| cpe:/a:redhat:rhel_e4s:9.2::appstream | 9.2 | — | Red Hat |
| cpe:/o:redhat:rhel_e4s:9.2::baseos | 9.2 | — | Red Hat |
| cpe:/a:redhat:rhel_eus:9.4::appstream | 9.4 | — | Red Hat |
| cpe:/o:redhat:rhel_eus:9.4::baseos | 9.4 | — | Red Hat |
| cpe:/a:redhat:discovery:1.14::el9 | 1.14 | — | Red Hat |
| cpe:/a:redhat:enterprise_linux:10 | 10 | — | Red Hat |
- cpe:/a:redhat:enterprise_linux:8::appstream Versions 8 — ·Red Hat
- cpe:/o:redhat:enterprise_linux:8::baseos Versions 8 — ·Red Hat
- cpe:/a:redhat:enterprise_linux:9::appstream Versions 9 — ·Red Hat
- cpe:/o:redhat:enterprise_linux:9::baseos Versions 9 — ·Red Hat
- cpe:/a:redhat:rhel_e4s:9.2::appstream Versions 9.2 — ·Red Hat
- cpe:/o:redhat:rhel_e4s:9.2::baseos Versions 9.2 — ·Red Hat
- cpe:/a:redhat:rhel_eus:9.4::appstream Versions 9.4 — ·Red Hat
- cpe:/o:redhat:rhel_eus:9.4::baseos Versions 9.4 — ·Red Hat
- cpe:/a:redhat:discovery:1.14::el9 Versions 1.14 — ·Red Hat
- cpe:/a:redhat:enterprise_linux:10 Versions 10 — ·Red Hat
Remediation
- Fix · CNA gnutls Fixed in 3.8.8, 3.8.9
Red Hat 5 advisories
- RHSA-2025:17361 Released 2025-10-06 · Red Hat rating Moderategnutls security, bug fix, and enhancement update
- Red Hat Enterprise Linux AppStream E4S (v.9.2) gnutls-c++-3.7.6-21.el9_2.4, gnutls-dane-3.7.6-21.el9_2.4, gnutls-devel-3.7.6-21.el9_2.4 +1
- Red Hat Enterprise Linux BaseOS E4S (v.9.2) gnutls-3.7.6-21.el9_2.4
- RHSA-2025:8385 Released 2025-06-02 · Red Hat rating ModerateA Subscription Management tool for finding and reporting Red Hat product usage
- Red Hat Discovery 1.14 registry.redhat.io/discovery/discovery-server-rhel9, registry.redhat.io/discovery/discovery-ui-rhel9
- RHSA-2025:8020 Released 2025-05-20 · Red Hat rating Moderategnutls security update
- Red Hat Enterprise Linux AppStream EUS (v.9.4) gnutls-c++-3.8.3-4.el9_4.2, gnutls-dane-3.8.3-4.el9_4.2, gnutls-devel-3.8.3-4.el9_4.2 +1
- Red Hat Enterprise Linux BaseOS EUS (v.9.4) gnutls-3.8.3-4.el9_4.2
Show 2 more Red Hat advisories
- RHSA-2025:7076 Released 2025-05-13 · Red Hat rating Moderategnutls security update
- Red Hat Enterprise Linux AppStream (v. 9) gnutls-c++-3.8.3-6.el9, gnutls-dane-3.8.3-6.el9, gnutls-devel-3.8.3-6.el9 +1
- Red Hat Enterprise Linux BaseOS (v. 9) gnutls-3.8.3-6.el9
- RHSA-2025:4051 Released 2025-04-23 · Red Hat rating Moderategnutls security update
- Red Hat Enterprise Linux AppStream (v. 8) gnutls-c++-3.6.16-8.el8_10.3, gnutls-dane-3.6.16-8.el8_10.3, gnutls-devel-3.6.16-8.el8_10.3 +1
- Red Hat Enterprise Linux BaseOS (v. 8) gnutls-3.6.16-8.el8_10.3
Vendor assessments
Red Hat
Red Hat rating: Moderate. Red Hat's page for this CVE →
| Product | Status | Plan or fix |
|---|---|---|
| Red Hat Enterprise Linux 6 | Affected | No fix planned: Out of support scope |
| Red Hat Enterprise Linux 7 | Affected | No fix planned: Out of support scope |
| Red Hat OpenShift Container Platform 4 | Affected | No fix yet: Fix deferred |
| Red Hat Discovery 1.14 | Fixed | RHSA-2025:8385 |
| Red Hat Enterprise Linux AppStream (v. 8) | Fixed | RHSA-2025:4051 |
| Red Hat Enterprise Linux AppStream (v. 9) | Fixed | RHSA-2025:7076 |
| Red Hat Enterprise Linux AppStream E4S (v.9.2) | Fixed | RHSA-2025:17361 |
| Red Hat Enterprise Linux AppStream EUS (v.9.4) | Fixed | RHSA-2025:8020 |
| Red Hat Enterprise Linux BaseOS (v. 8) | Fixed | RHSA-2025:4051 |
| Red Hat Enterprise Linux BaseOS (v. 9) | Fixed | RHSA-2025:7076 |
| Red Hat Enterprise Linux BaseOS E4S (v.9.2) | Fixed | RHSA-2025:17361 |
| Red Hat Enterprise Linux BaseOS EUS (v.9.4) | Fixed | RHSA-2025:8020 |
Not affected: 1 product
- Red Hat Enterprise Linux 10
Timeline
- 2026-10-02 Threatist record created from CVE-2024-12243
- 2026-10-03 Alias added: GHSA-cqj4-fp95-jqxq
- 2026-10-21 Fix available: discovery/[email protected], discovery/[email protected] · CNA
- 2026-10-21 Affected versions changed · Red Hat
- 2026-10-21 Affected versions changed · CNA
- 2026-10-22 Affected versions changed · Red Hat
- 2026-10-23 Affected versions changed · CNA
- 2026-10-23 Affected versions changed · Red Hat
References
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Sources
- CVE-2024-12243 · CVE Program
- CVE-2024-12243 · NVD
- FIRST EPSS
- GHSA-cqj4-fp95-jqxq · GitHub Advisory Database · CC BY 4.0
- CVE-2024-12243 · Red Hat security data · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences