CVE-2015-8271: The AMF3CD_AddProp function in amf.c in RTMPDump 2.4 allows remote RTMP Media servers to execute arbitrary cod

This week

CRITICAL 9.8REMOTEDOWNGRADE

CVE-2015-8271 is a critical-severity flaw (CVSS 9.8) affecting rtmpdump. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

The AMF3CD_AddProp function in amf.c in RTMPDump 2.4 allows remote RTMP Media servers to execute arbitrary code.

Why this priority

Critical severity
EPSS top 7%: very likely to be exploited
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	9.8 (Critical)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	5.9% (top 7%)
CISA exploited list	No
Weakness	CWE-123
Published	2017-04-13
Last modified	2026-06-17

Publisher (CNA): CERT/CC · Vendor: rtmpdump project

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

Am I affected?

Timeline

2017-04-13 14:59 UTCPublished CVE record published
2026-06-17 00:34 UTCUpdated Record last modified

rtmpdump project rtmpdump DOWNGRADE

Affected: 2.4

Fixed in: no fixed release known

Safe to downgrade to: a release before 2.4

1. Check installed version

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

2. No fixed release: DOWNGRADE to a release before 2.4 (Debian / Ubuntu)

apt-cache madison rtmpdump sudo apt install rtmpdump=<VERSION_BEFORE_2.4> sudo apt-mark hold rtmpdump

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

dnf --showduplicates list rtmpdump sudo dnf downgrade rtmpdump-<VERSION_BEFORE_2.4> sudo dnf versionlock add rtmpdump

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-2015-8271?

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

Is CVE-2015-8271 being exploited?

CVE-2015-8271 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-2015-8271 affect?

CVE-2015-8271 affects rtmpdump. Severity is critical (CVSS 9.8). The AMF3CD_AddProp function in amf.c in RTMPDump 2.4 allows remote RTMP Media servers to execute arbitrary code.

How urgent is CVE-2015-8271?

Priority 68/100. Critical severity; EPSS top 7%: very likely to be exploited; Public exploit reference; Remotely exploitable, no login, no user action

Related CVEs

CVE-2015-8272 MEDIUM 6.5 DOWNGRADE RTMPDump 2.4 allows remote attackers to trigger a denial of service (NULL pointer dereference and process cras
CVE-2015-8270 HIGH 7.5 DOWNGRADE The AMF3ReadString function in amf.c in RTMPDump 2.4 allows remote RTMP Media servers to cause a denial of ser

References

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