CVE-2015-8270: The AMF3ReadString function in amf.c in RTMPDump 2.4 allows remote RTMP Media servers to cause a denial of ser

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HIGH 7.5REMOTEDOWNGRADE

CVE-2015-8270 is a high-severity flaw (CVSS 7.5) affecting rtmpdump. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

The AMF3ReadString function in amf.c in RTMPDump 2.4 allows remote RTMP Media servers to cause a denial of service (invalid pointer dereference and process crash).

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	3.2% (top 12%)
CISA exploited list	No
Weakness	CWE-476
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-2015-8270?

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

Is CVE-2015-8270 being exploited?

CVE-2015-8270 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-2015-8270 affect?

CVE-2015-8270 affects rtmpdump. Severity is high (CVSS 7.5). The AMF3ReadString function in amf.c in RTMPDump 2.4 allows remote RTMP Media servers to cause a denial of service (invalid pointer dereference and process crash).

How urgent is CVE-2015-8270?

Priority 58/100. High severity; 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-2015-8271 CRITICAL 9.8 DOWNGRADE The AMF3CD_AddProp function in amf.c in RTMPDump 2.4 allows remote RTMP Media servers to execute arbitrary cod

References

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