GHSA-8qxj-f9rh-9fg2
Suggest an improvement- Source
- https://github.com/advisories/GHSA-8qxj-f9rh-9fg2
- Import Source
- https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2020/04/GHSA-8qxj-f9rh-9fg2/GHSA-8qxj-f9rh-9fg2.json
- JSON Data
- https://api.osv.dev/v1/vulns/GHSA-8qxj-f9rh-9fg2
- Aliases
- Published
- 2020-04-01T16:35:26Z
- Modified
- 2024-09-20T17:07:56.173531Z
- Severity
-
- 9.1 (Critical) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N CVSS Calculator
- 9.3 (Critical) CVSS_V4 - CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N CVSS Calculator
- Summary
- Improper Verification of Cryptographic Signature in Pure-Python ECDSA
- Details
-
A flaw was found in all python-ecdsa versions before 0.13.3, where it did not correctly verify whether signatures used DER encoding. Without this verification, a malformed signature could be accepted, making the signature malleable. Without proper verification, an attacker could use a malleable signature to create false transactions.
- References
-
- https://nvd.nist.gov/vuln/detail/CVE-2019-14859
- https://github.com/warner/python-ecdsa/issues/114
- https://github.com/warner/python-ecdsa/pull/115
- https://github.com/tlsfuzzer/python-ecdsa/commit/3427fa29f319b27898a28601955807abb44c0830
- https://github.com/tlsfuzzer/python-ecdsa/commit/9080d1d5ac533da0de00466aaffb49bee808bb4e
- https://github.com/tlsfuzzer/python-ecdsa/commit/b0ea52bb3aa9a16c9a4a91fdc0041edbfed10b31
- https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2019-14859
- https://github.com/advisories/GHSA-8qxj-f9rh-9fg2
- https://github.com/pypa/advisory-database/tree/main/vulns/ecdsa/PYSEC-2020-163.yaml
- https://github.com/warner/python-ecdsa
- https://github.com/warner/python-ecdsa/releases/tag/python-ecdsa-0.13.3
- https://pypi.org/project/ecdsa/0.13.3
Affected packages
PyPI / ecdsa
Package
- Name
- ecdsa
- View open source insights on deps.dev
- Purl
- pkg:pypi/ecdsa
Affected ranges
- Type
- ECOSYSTEM
- Events
-
Introduced0Unknown introduced version / All previous versions are affectedFixed0.13.3
Ecosystem specific
{
"affected_functions": [
"ecdsa.der.remove_constructed",
"ecdsa.der.remove_sequence",
"ecdsa.der.remove_octet_string",
"ecdsa.der.remove_object",
"ecdsa.der.remove_integer",
"ecdsa.der.read_length",
"ecdsa.keys.VerifyingKey.verify_digest",
"ecdsa.util.sigdecode_string",
"ecdsa.util.sigdecode_strings"
]
}