CVE-2012-5875: Firefly Media Server 1.0.0.1359 allows remote attackers to cause a denial of service (NULL pointer dereference

This week

MEDIUM 5.0DOWNGRADE

CVE-2012-5875 is a medium-severity flaw (CVSS 5.0) affecting firefly media server. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Firefly Media Server 1.0.0.1359 allows remote attackers to cause a denial of service (NULL pointer dereference) via a (1) crafted Connection HTTP header; a return carriage control character in the (2) Accept Language header, (3) User-agent header, (4) Host header, or (5) protocol version; or a (6) crafted HTTP protocol version.

Why this priority

EPSS top 4%: very likely to be exploited
Public exploit reference

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

Risk facts

CVSS score	5.0 (Medium)
EPSS exploit chance	10.8% (top 4%)
CISA exploited list	No
Published	2013-01-18
Last modified	2026-06-16

Publisher (CNA): MITRE · Vendor: fireflymediaserver

Last updated 2026-06-16 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2013-01-18 11:48 UTCPublished CVE record published
2026-06-16 23:47 UTCUpdated Record last modified

fireflymediaserver firefly media server DOWNGRADE

Affected: 1.0.0.1359

Fixed in: no fixed release known

Safe to downgrade to: a release before 1.0.0.1359

1. Check installed version

apt-cache policy firefly-media-server || rpm -q firefly-media-server || firefly-media-server --version

2. No fixed release: DOWNGRADE to a release before 1.0.0.1359 (Debian / Ubuntu)

apt-cache madison firefly-media-server sudo apt install firefly-media-server=<VERSION_BEFORE_1.0.0.1359> sudo apt-mark hold firefly-media-server

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

dnf --showduplicates list firefly-media-server sudo dnf downgrade firefly-media-server-<VERSION_BEFORE_1.0.0.1359> sudo dnf versionlock add firefly-media-server

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.

Public exploits and detection

Public code exists for this CVE. Treat unpatched systems as at risk, and only run PoCs in a lab.

Exploit-DB: FireFly Mediaserver 1.0.0.1359 - Null Pointer Dereference

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-2012-5875?

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

Is CVE-2012-5875 being exploited?

CVE-2012-5875 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-2012-5875 affect?

CVE-2012-5875 affects firefly media server. Severity is medium (CVSS 5.0). Firefly Media Server 1.0.0.1359 allows remote attackers to cause a denial of service (NULL pointer dereference) via a (1) crafted Connection HTTP header; a return carriage control character in the (2) Accept Language header, (3) User-agent

How urgent is CVE-2012-5875?

Priority 46/100. EPSS top 4%: very likely to be exploited; Public exploit reference

References

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