CVE-2019-13050

Exp

Interaction between the sks-keyserver code through 1.2.0 of the SKS keyserver network, and GnuPG through 2.2.16, makes it risky to have a GnuPG keyserver configuration line referring to a host on the SKS keyserver network. Retrieving data from this network may cause a persistent denial of service, because of a Certificate Spamming Attack.

Published: 2019-06-29 Last update: 2026-06-16 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2019-13050 is rated High Exploit Risk (76.4/100): CVSS High severity, with medium exploitation likelihood (EPSS 2.66%). 1 public exploit reference(s) are indexed (Exploit-DB). EPSS rose +2.10% over the last day, indicating growing attacker interest. Public exploits are available—assess exposure, apply mitigations, and prioritize patching.

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

Public exploit references (Exploit-DB) for CVE-2019-13050

EDB-ID Source Kind Published Link
— nvd_ref exploit_tag Exploit-DB ↗

Exploit prediction scoring system (EPSS) score for CVE-2019-13050

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 0.56% 2.66% +2.10%
2 2026-03-14 0.74% 0.56% -0.17%
3 2025-11-21 — 0.74% —

Full EPSS history (18 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2019-13050

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]
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-2019-13050

OS Trackers for CVE-2019-13050

vendor priority summary link
alpine high CVE-2019-13050: 1 source package rows (gnupg); 6 state rows across 5 repos (3.19-main, 3.20-main, 3.21-main, 3.22-main, edge-main); fixed 0, open 6. https://security.alpinelinux.org/vuln/CVE-2019-13050
redhat medium — https://access.redhat.com/security/cve/CVE-2019-13050
suse medium CVE-2019-13050 severity moderate: SUSE including 311 source package names (0.1.0:gpg2-2.2.5-4.11.1, 0.1.75:gpg2-2.2.5-4.11.1, …), 371 product×package rows across 107 product lines (Container caasp/v4/389-ds, Container caasp/v4/busybox, … (107 product lines)): Fixed 214, Known Affected 157. https://www.suse.com/security/cve/CVE-2019-13050/
ubuntu low CVE-2019-13050 low priority: Ubuntu including 3 source packages (gnupg, gnupg2, sks), 55 status rows across 19 suites (bionic, cosmic, disco, eoan, focal, groovy, hirsute, impish, jammy, kinetic, lunar, mantic, noble, oracular, plucky, questing, trusty, upstream, xenial): not-affected 22, DNE 18, ignored 6, deferred 5, released 3, needs-triage 1. https://ubuntu.com/security/CVE-2019-13050

Affected software / configurations for CVE-2019-13050

Vendor Product Version Raw CPE
gnupg gnupg <= 2.2.16 cpe:2.3:a:gnupg:gnupg:*:*:*:*:*:*:*:*
sks_keyserver_project sks_keyserver <= 1.2.0 cpe:2.3:a:sks_keyserver_project:sks_keyserver:*:*:*:*:*:*:*:*
fedoraproject fedora 29 cpe:2.3:o:fedoraproject:fedora:29:*:*:*:*:*:*:*
fedoraproject fedora 30 cpe:2.3:o:fedoraproject:fedora:30:*:*:*:*:*:*:*
opensuse leap 15.0 cpe:2.3:o:opensuse:leap:15.0:*:*:*:*:*:*:*
opensuse leap 15.1 cpe:2.3:o:opensuse:leap:15.1:*:*:*:*:*:*:*
f5 traffix_signaling_delivery_controller >= 5.0.0, <= 5.1.0 cpe:2.3:a:f5:traffix_signaling_delivery_controller:*:*:*:*:*:*:*:*

References for CVE-2019-13050

URL Tags
http://lists.opensuse.org/opensuse-security-announce/2019-08/msg00039.html Mailing List Third Party Advisory
https://gist.github.com/rjhansen/67ab921ffb4084c865b3618d6955275f Exploit Issue Tracking Mitigation Third Party Advisory
https://lists.apache.org/thread.html/r58af02e294bd07f487e2c64ffc0a29b837db5600e33b6e698b9d696b%40%3Cissues.bookkeeper.apache.org%3E
https://lists.apache.org/thread.html/rf4c02775860db415b4955778a131c2795223f61cb8c6a450893651e4%40%3Cissues.bookkeeper.apache.org%3E
https://lists.apache.org/thread.html/rf9fa47ab66495c78bb4120b0754dd9531ca2ff0430f6685ac9b07772%40%3Cdev.mina.apache.org%3E
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/AUK2YRO6QIH64WP2LRA5D4LACTXQPPU4/
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/CP4ON34YEXEZDZOXXWV43KVGGO6WZLJ5/
https://lists.gnupg.org/pipermail/gnupg-announce/2019q3/000439.html Third Party Advisory
https://support.f5.com/csp/article/K08654551 Third Party Advisory
https://support.f5.com/csp/article/K08654551?utm_source=f5support&amp%3Butm_medium=RSS
https://twitter.com/lambdafu/status/1147162583969009664 Third Party Advisory
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