Description
An error-handling flaw was found in python-ecdsa before version 0.13.3. During signature decoding, malformed DER signatures could raise unexpected exceptions (or no exceptions at all), which could lead to a denial of service.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| [UNKNOWN] | python-ecdsa | 0.13.3 | — |
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | python-ecdsa | 0.13.3-1 | — |
| Debian 13 | python-ecdsa | 0.13.3-1 | — |
| Debian 12 | python-ecdsa | 0.13.3-1 | — |
| Debian 10 | python-ecdsa | 0.13-3+deb10u1 | DSA-4588-1 |
| Debian 9 | python-ecdsa | 0.13-2+deb9u1 | DSA-4588-1 |
Show 1 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 8 | python-ecdsa | 0.11-1+deb8u1 | DLA-1978-1 |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 18.04 LTS | python-ecdsa | 0.13-2ubuntu0.18.04.1 | USN-4196-1 |
| Ubuntu 16.04 LTS | python-ecdsa | 0.13-2ubuntu0.16.04.1 | USN-4196-1 |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Red Hat Satellite Capsule 6 | foreman | 2.5.2.17-2.el7sat | RHSA-2021:4702 |
| Red Hat Satellite Capsule 6 | python-aiohttp | 3.7.4-1.el7pc | RHSA-2021:4702 |
| Red Hat Satellite Capsule 6 | python-ecdsa +1 | 0.13.3-2.el7pc | RHSA-2021:4702 |
| Red Hat Satellite Capsule 6 | python-pyyaml +1 | 5.4.1-1.el7pc | RHSA-2021:4702 |
| Red Hat Satellite Capsule 6 | python-urllib3 +1 | 1.26.5-1.el7pc | RHSA-2021:4702 |
| Red Hat Satellite Capsule 6 | python3-django | 2.2.24-1.el7pc | RHSA-2021:4702 |
| Red Hat Satellite Capsule 6 | satellite +1 | 6.10.0-3.el7sat | RHSA-2021:4702 |
| Red Hat Satellite Capsule 6 | tfm-rubygem-nokogiri | 1.11.3-2.el7sat | RHSA-2021:4702 |
| Red Hat Satellite 6 | candlepin | 4.0.9-1.el7sat | RHSA-2021:4702 |
| Red Hat Satellite 6 | foreman | 2.5.2.17-2.el7sat | RHSA-2021:4702 |
| Red Hat Satellite 6 | python-aiohttp | 3.7.4-1.el7pc | RHSA-2021:4702 |
| Red Hat Satellite 6 | python-ecdsa +1 | 0.13.3-2.el7pc | RHSA-2021:4702 |
| Red Hat Satellite 6 | python-pyyaml +1 | 5.4.1-1.el7pc | RHSA-2021:4702 |
| Red Hat Satellite 6 | python-urllib3 +1 | 1.26.5-1.el7pc | RHSA-2021:4702 |
| Red Hat Satellite 6 | python3-django | 2.2.24-1.el7pc | RHSA-2021:4702 |
| Red Hat Satellite 6 | satellite | 6.10.0-3.el7sat | RHSA-2021:4702 |
| Red Hat Satellite 6 | tfm-rubygem-activerecord-session_store | 2.0.0-1.el7sat | RHSA-2021:4702 |
| Red Hat Satellite 6 | tfm-rubygem-addressable | 2.8.0-1.el7sat | RHSA-2021:4702 |
| Red Hat Satellite 6 | tfm-rubygem-nokogiri | 1.11.3-2.el7sat | RHSA-2021:4702 |
| Red Hat Satellite 6 | tfm-rubygem-puma | 5.3.2-1.el7sat | RHSA-2021:4702 |
| Red Hat Satellite 6 | tfm-rubygem-rails +1 | 6.0.3.7-1.el7sat | RHSA-2021:4702 |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 15 SP2 | python-ecdsa | 0.13.3-3.3.1 | SUSE-SU-2019:2891-2 |
| SLES 15 SP1 | python-ecdsa | 0.13.3-3.3.1 | SUSE-SU-2019:2891-2, SUSE-SU-2019:2891-1 |
| SLES 15 | python-ecdsa | 0.13.3-3.3.1 | SUSE-SU-2019:2891-1 |
| SLES 12 | python-ecdsa | 0.13.3-5.10.1 | SUSE-SU-2019:3024-1 |
Show 7 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SUSE OpenStack Cloud Crowbar 9 | python-ecdsa | 0.13.3-5.10.1 | SUSE-SU-2019:3024-1 |
| SUSE OpenStack Cloud Crowbar 8 | python-ecdsa | 0.13.3-5.10.1 | SUSE-SU-2019:3024-1 |
| SUSE OpenStack Cloud 9 | python-ecdsa | 0.13.3-5.10.1 | SUSE-SU-2019:3024-1 |
| SUSE OpenStack Cloud 8 | python-ecdsa | 0.13.3-5.10.1 | SUSE-SU-2019:3024-1 |
| SUSE OpenStack Cloud 7 | python-ecdsa | 0.13.3-5.10.1 | SUSE-SU-2019:3024-1 |
| SUSE Manager Server 3.2 | python-ecdsa | 0.13.3-5.10.1 | SUSE-SU-2019:3024-1 |
| SUSE HPE Helion OpenStack 8 | python-ecdsa | 0.13.3-5.10.1 | SUSE-SU-2019:3024-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | python-ecdsa | 0.16.1-1.5 | openSUSE-SU-2026:12008-1, openSUSE-SU-2024:13862-1, openSUSE-SU-2024:11229-1 |
| openSUSE Leap 15.1 | python-ecdsa | 0.13.3-lp151.3.3.1 | openSUSE-SU-2019:2474-1 |
| openSUSE Leap 15.0 | python-ecdsa | 0.13.3-lp150.2.3.1 | openSUSE-SU-2019:2472-1 |
Alpine
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.24 | py3-ecdsa | 0.13.3-r0 | — |
| Alpine v3.23 | py3-ecdsa | 0.13.3-r0 | — |
| Alpine v3.22 | py3-ecdsa | 0.13.3-r0 | — |
| Alpine v3.21 | py3-ecdsa | 0.13.3-r0 | — |
| Alpine v3.20 | py3-ecdsa | 0.13.3-r0 | — |
Show 9 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.19 | py3-ecdsa | 0.13.3-r0 | — |
| Alpine v3.18 | py3-ecdsa | 0.13.3-r0 | — |
| Alpine v3.17 | py3-ecdsa | 0.13.3-r0 | — |
| Alpine v3.16 | py3-ecdsa | 0.13.3-r0 | — |
| Alpine v3.15 | py3-ecdsa | 0.13.3-r0 | — |
| Alpine v3.14 | py3-ecdsa | 0.13.3-r0 | — |
| Alpine v3.13 | py3-ecdsa | 0.13.3-r0 | — |
| Alpine v3.12 | py3-ecdsa | 0.13.3-r0 | — |
| Alpine v3.11 | py3-ecdsa | 0.13.3-r0 | — |
Affected packages
| Ecosystem | Package | Affected | Fixed | Record |
|---|---|---|---|---|
| PyPI | ecdsa | < 0.13.3 | 0.13.3 | GHSA-pwfw-mgfj-7g3g |
Advisories 12
- RHSA-2021:4702 Red Hat Security Advisory: Satellite 6.10 Release Red Hat Security Advisories (RHSA) · Oct 13, 2026
- openSUSE-SU-2026:12008-1 python313-ecdsa-0.19.2-2.2 on GA media SUSE / openSUSE Security Updates · Oct 5, 2026
- DSA-4588-1 python-ecdsa - security update Debian Security (DSA / DLA) · Mar 9, 2026
- DLA-1978-1 python-ecdsa - security update Debian Security (DSA / DLA) · Mar 9, 2026
- USN-4196-1 python-ecdsa vulnerabilities Ubuntu Security Notices (USN) · Feb 10, 2026
- SUSE-SU-2019:3024-1 Security update for python-ecdsa SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2024:11229-1 python36-ecdsa-0.16.1-1.5 on GA media SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2019:2474-1 Security update for python-ecdsa SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2019:2891-2 Security update for python-ecdsa SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2019:2472-1 Security update for python-ecdsa SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2019:2891-1 Security update for python-ecdsa SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2024:13862-1 python310-ecdsa-0.19.0-1.1 on GA media SUSE / openSUSE Security Updates · Feb 4, 2026