CVE-2019-14853

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.

Published: 2019-11-26 Last update: 2024-11-21 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2019-14853 is rated Moderate Risk (61.4/100): CVSS High severity, with medium exploitation likelihood (EPSS 2.50%). EPSS rose +2.44% over the last day, indicating growing attacker interest. Review affected assets and schedule remediation.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2019-14853

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-06-15 0.07% 2.50% +2.44%
2 2025-11-21 0.50% 0.07% -0.43%
3 2025-11-18 — 0.50% —

Full EPSS history (13 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2019-14853

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
7.5 3.1 HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:N)
Doesn’t really leak secrets in a meaningful way.
Integrity (I:N)
Data isn’t meaningfully altered or forged.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 3.9 3.6 [email protected]
3.7 3.0 LOW
CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:H)
Even with access, the exploit needs extra luck, timing, or a fussy environment to actually work.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:N)
Doesn’t really leak secrets in a meaningful way.
Integrity (I:N)
Data isn’t meaningfully altered or forged.
Availability (A:L)
Might cause slowdowns, glitches, or partial disruption—not a full brick.
 2.2 1.4 [email protected]
5.0 2.0 MEDIUM
AV:N/AC:L/Au:N/C:N/I:N/A:P Click to expand
Access vector (AV:N)
Can be exploited remotely over network reachability.
Access complexity (AC:L)
Exploitation conditions are straightforward and predictable.
Authentication (AU:N)
No authentication is required.
Confidentiality impact (C:N)
No confidentiality impact.
Integrity impact (I:N)
No integrity impact.
Availability impact (A:P)
Partial availability impact.
 10.0 2.9 [email protected]

Weakness enumeration for CVE-2019-14853

GitHub Security Advisory for CVE-2019-14853

GHSA-pwfw-mgfj-7g3g · Severity: high · Ecosystem: pip — ecdsa Denial of Service vulnerability in signature verification and signature malleability

OS Trackers for CVE-2019-14853

vendor priority summary link
alpine high CVE-2019-14853: 1 source package rows (py3-ecdsa); 7 state rows across 7 repos (3.17-community, 3.18-community, 3.19-community, 3.20-community, 3.21-community, 3.22-community, edge-community); fixed 7, open 0. https://security.alpinelinux.org/vuln/CVE-2019-14853
debian not yet assigned CVE-2019-14853 not yet assigned priority: Debian including 1 source packages (python-ecdsa), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 5. https://security-tracker.debian.org/tracker/CVE-2019-14853
redhat low — https://access.redhat.com/security/cve/CVE-2019-14853
suse medium CVE-2019-14853 severity moderate: SUSE including 255 source package names (0.1.75:python3-ecdsa-0.13.3-3.3.1, 1.1.1.0.1.5.57:python3-ecdsa-0.13.3-3.3.1, …), 305 product×package rows across 65 product lines (Container caasp/v4/k8s-sidecar, Container ses/6/cephcsi/cephcsi, … (65 product lines)): Known Affected 181, Fixed 122, Will Not Fix 2. https://www.suse.com/security/cve/CVE-2019-14853/
ubuntu low CVE-2019-14853 low priority: Ubuntu including 1 source packages (python-ecdsa), 6 status rows across 6 suites (bionic, disco, eoan, trusty, upstream, xenial): released 5, DNE 1. https://ubuntu.com/security/CVE-2019-14853

Affected software / configurations for CVE-2019-14853

Vendor Product Version Raw CPE
python-ecdsa_project python-ecdsa < 0.13.3 cpe:2.3:a:python-ecdsa_project:python-ecdsa:*:*:*:*:*:*:*:*

References for CVE-2019-14853

cvelogic Threat Intelligence