CVE-2017-12130: An exploitable NULL pointer dereference vulnerability exists in the tinysvcmdns library version 2017-11-05

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HIGH 7.5REMOTEDOWNGRADE

CVE-2017-12130 is a high-severity flaw (CVSS 7.5) affecting tinysvcmdns. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

An exploitable NULL pointer dereference vulnerability exists in the tinysvcmdns library version 2017-11-05. A specially crafted packet can make the library dereference a NULL pointer leading to a server crash and denial of service. An attacker needs to send a DNS query to trigger this vulnerability.

Why this priority

High severity
Public exploit reference
Remotely exploitable, no login, no user action

No fix is published yet: follow the downgrade or mitigation steps.

Risk facts

CVSS score	7.5 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	2.4% (top 16%)
CISA exploited list	No
Weakness	CWE-476
Published	2018-01-20
Last modified	2026-06-17

Publisher (CNA): Talos · Vendor: tinysvcmdns project

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2018-01-20 00:29 UTCPublished CVE record published
2026-06-17 01:02 UTCUpdated Record last modified

tinysvcmdns project tinysvcmdns DOWNGRADE

Affected: 2017-11-05

Fixed in: no fixed release known

Safe to downgrade to: a release before 2017-11-05

1. Check installed version

apt-cache policy tinysvcmdns || rpm -q tinysvcmdns || tinysvcmdns --version

2. No fixed release: DOWNGRADE to a release before 2017-11-05 (Debian / Ubuntu)

apt-cache madison tinysvcmdns sudo apt install tinysvcmdns=<VERSION_BEFORE_2017-11-05> sudo apt-mark hold tinysvcmdns

2. No fixed release: DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list tinysvcmdns sudo dnf downgrade tinysvcmdns-<VERSION_BEFORE_2017-11-05> sudo dnf versionlock add tinysvcmdns

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2017-12130?

tinysvcmdns: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2017-12130 being exploited?

CVE-2017-12130 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2017-12130 affect?

CVE-2017-12130 affects tinysvcmdns. Severity is high (CVSS 7.5). An exploitable NULL pointer dereference vulnerability exists in the tinysvcmdns library version 2017-11-05. A specially crafted packet can make the library dereference a NULL pointer leading to a server crash and denial of service. An attac

How urgent is CVE-2017-12130?

Priority 57/100. High severity; Public exploit reference; Remotely exploitable, no login, no user action

Related CVEs

CVE-2019-9748 CRITICAL 9.1 UPGRADE In tinysvcmdns through 2018-01-16, an mDNS server processing a crafted packet can perform arbitrary data read
CVE-2019-9747 HIGH 7.5 UPGRADE In tinysvcmdns through 2018-01-16, a maliciously crafted mDNS (Multicast DNS) packet triggers an infinite loop
CVE-2017-12087 CRITICAL 10.0 DOWNGRADE An exploitable heap overflow vulnerability exists in the tinysvcmdns library version 2016-07-18

References

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