CVE-2024-33783: MP-SPDZ v0.3.8 was discovered to contain a segmentation violation via the function osuCrypto::SilentMultiPprfR

Routine

MEDIUM 6.5DOWNGRADE

CVE-2024-33783 is a medium-severity flaw (CVSS 6.5) 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 segmentation violation via the function osuCrypto::SilentMultiPprfReceiver::expand in /Tools/SilentPprf.cpp. This vulnerability allows attackers to cause a Denial of Service (DoS) via a crafted message.

Why this priority

Public exploit reference

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

Risk facts

CVSS score	6.5 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	Required
EPSS exploit chance	0.5% (top 56%)
CISA exploited list	No
Weakness	CWE-120
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-2024-33783?

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

Is CVE-2024-33783 being exploited?

CVE-2024-33783 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-2024-33783 affect?

CVE-2024-33783 affects multi-protocol spdz. Severity is medium (CVSS 6.5). MP-SPDZ v0.3.8 was discovered to contain a segmentation violation via the function osuCrypto::SilentMultiPprfReceiver::expand in /Tools/SilentPprf.cpp. This vulnerability allows attackers to cause a Denial of Service (DoS) via a crafted mes

How urgent is CVE-2024-33783?

Priority 39/100. Public exploit reference

Related CVEs

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-2024-33781 HIGH 7.5 DOWNGRADE MP-SPDZ v0.3.8 was discovered to contain a stack overflow via the function octetStream::get_bytes in /Tools/oc
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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