CVE-2024-33781: MP-SPDZ v0.3.8 was discovered to contain a stack overflow via the function octetStream::get_bytes in /Tools/oc

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HIGH 7.5REMOTEDOWNGRADE

CVE-2024-33781 is a high-severity flaw (CVSS 7.5) affecting multi-protocol spdz. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

MP-SPDZ v0.3.8 was discovered to contain a stack overflow via the function octetStream::get_bytes in /Tools/octetStream.cpp. This vulnerability allows attackers to cause a Denial of Service (DoS) via a crafted message.

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	0.7% (top 48%)
CISA exploited list	No
Weakness	CWE-125
Published	2024-05-07
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: csiro

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

Am I affected?

Timeline

2024-05-07 14:15 UTCPublished CVE record published
2026-06-17 07:32 UTCUpdated Record last modified

csiro multi-protocol spdz DOWNGRADE

Affected: 0.3.8

Fixed in: no fixed release known

Safe to downgrade to: a release before 0.3.8

1. Check installed version

apt-cache policy multi-protocol-spdz || rpm -q multi-protocol-spdz || multi-protocol-spdz --version

2. No fixed release: DOWNGRADE to a release before 0.3.8 (Debian / Ubuntu)

apt-cache madison multi-protocol-spdz sudo apt install multi-protocol-spdz=<VERSION_BEFORE_0.3.8> sudo apt-mark hold multi-protocol-spdz

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

dnf --showduplicates list multi-protocol-spdz sudo dnf downgrade multi-protocol-spdz-<VERSION_BEFORE_0.3.8> sudo dnf versionlock add multi-protocol-spdz

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-2024-33781?

multi-protocol spdz: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2024-33781 being exploited?

CVE-2024-33781 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-2024-33781 affect?

CVE-2024-33781 affects multi-protocol spdz. Severity is high (CVSS 7.5). MP-SPDZ v0.3.8 was discovered to contain a stack overflow via the function octetStream::get_bytes in /Tools/octetStream.cpp. This vulnerability allows attackers to cause a Denial of Service (DoS) via a crafted message.

How urgent is CVE-2024-33781?

Priority 49/100. High severity; Public exploit reference; Remotely exploitable, no login, no user action

Related CVEs

CVE-2024-33783 MEDIUM 6.5 DOWNGRADE MP-SPDZ v0.3.8 was discovered to contain a segmentation violation via the function osuCrypto::SilentMultiPprfR
CVE-2024-33782 HIGH 7.5 DOWNGRADE MP-SPDZ v0.3.8 was discovered to contain a stack overflow via the function OTExtensionWithMatrix::extend in /O
CVE-2024-33780 MEDIUM 6.5 DOWNGRADE MP-SPDZ v0.3.8 was discovered to contain a segmentation violation via the function osuCrypto::copyOut at /Tool

References

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