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CVE-2019-20917

23
FAUCET Score

CVE-2019-20917 describes a NULL pointer dereference vulnerability in InspIRCd versions 2.0.28 and earlier, and 3.3.0 and earlier, specifically within the mysql module when compiled with mariadb-connector-c 3.0.5 or newer. This flaw, when combined with the sqlauth or sqloper modules, allows any connected user to remotely crash the InspIRCd server. Rated 6.5 Medium (CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H), it indicates a network-based attack with low complexity and privileges, resulting in high availability impact. There is no evidence of active exploitation, public exploit code, or significant community discussion surrounding this vulnerability.

Impacted Technologies

VendorProductVersion(s)CPE
>= 2.0, < 2.0.28CPE matchmatch criteria
cpe:2.3:a:inspircd:inspircd:*:*:*:*:*:*:*:*
>= 3.0, < 3.3.0CPE matchmatch criteria
cpe:2.3:a:inspircd:inspircd:*:*:*:*:*:*:*:*
9.0CPE matchmatch criteria
cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*
10.0CPE matchmatch criteria
cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

6.5MEDIUM

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
Exploitability Score
2.8
Impact Score
3.6
CvssVersion
3.1

Exploit Intelligence

EPSS Score
2.79%
Probability of exploitation in next 30 days
EPSS Percentile
84.9%
Percentile rank of EPSS score among Peer Group
As of 2026-07-25
Model: v2026.06.15
This CVE's current EPSS score of 0.0279 is in the 95th percentile among its peer group of 21,951 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.1 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.0 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (1)

github_advisorypatch availablevia nvd_reference
View patch

References

docs.inspircd.org / security/2019-02
Vendor Advisory
github.com / inspircd/inspircd/commit/2cc35d8625b7ea5cbd1d1ebb116aff86c5280162
PatchThird Party Advisory
github.com / inspircd/inspircd/commit/8745660fcdac7c1b80c94cfc0ff60928cd4dd4b7
PatchThird Party Advisory
lists.debian.org / debian-lts-announce/2020/09/msg00015.html
Mailing ListThird Party Advisory
debian.org / security/2020/dsa-4764
Third Party Advisory