CVE-2023-33757: A lack of SSL certificate validation in Splicecom iPCS (iOS App) v1.3.4, iPCS2 (iOS App) v2.8 and before, and

Q: How do I fix CVE-2023-33757?

ipcs: upgrade to newer than 1.8.5; ipcs: downgrade or apply the listed mitigation; ipcs2: upgrade to newer than 2.8. Exact commands for each OS are on this page.

Q: Is CVE-2023-33757 being exploited?

CVE-2023-33757 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2023-33757 affect?

CVE-2023-33757 affects ipcs, ipcs, ipcs2. Severity is medium (CVSS 5.9). A lack of SSL certificate validation in Splicecom iPCS (iOS App) v1.3.4, iPCS2 (iOS App) v2.8 and before, and iPCS (Android App) v1.8.5 and before allows attackers to eavesdrop on communications via a man-in-the-middle attack.

Q: How urgent is CVE-2023-33757?

Priority 36/100. Public exploit reference; Remotely exploitable, no login, no user action

This week

MEDIUM 5.9REMOTEUPGRADEDOWNGRADEUPGRADE

CVE-2023-33757 is a medium-severity flaw (CVSS 5.9) affecting ipcs, ipcs, ipcs2. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

A lack of SSL certificate validation in Splicecom iPCS (iOS App) v1.3.4, iPCS2 (iOS App) v2.8 and before, and iPCS (Android App) v1.8.5 and before allows attackers to eavesdrop on communications via a man-in-the-middle attack.

Why this priority

Public exploit reference
Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	5.9 (Medium)
Attack vector	Network (remote)
Attack complexity	High
Privileges needed	None
User interaction	None
EPSS exploit chance	0.3% (top 79%)
CISA exploited list	No
Weakness	CWE-295
Published	2024-01-25
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: splicecom

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

Am I affected?

Timeline

2024-01-25 08:15 UTCPublished CVE record published
2026-06-17 06:02 UTCUpdated Record last modified

splicecom ipcs UPGRADE

Affected: <= 1.8.5

Fixed in: newer than 1.8.5

Safe to downgrade to: no unaffected older release

1. Check installed version

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

2. UPGRADE to newer than 1.8.5 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade ipcs

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade ipcs

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

splicecom ipcs DOWNGRADE

Affected: 1.3.4

Fixed in: no fixed release known

Safe to downgrade to: a release before 1.3.4

1. Check installed version

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

2. No fixed release: DOWNGRADE to a release before 1.3.4 (Debian / Ubuntu)

apt-cache madison ipcs sudo apt install ipcs=<VERSION_BEFORE_1.3.4> sudo apt-mark hold ipcs

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

dnf --showduplicates list ipcs sudo dnf downgrade ipcs-<VERSION_BEFORE_1.3.4> sudo dnf versionlock add ipcs

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.

splicecom ipcs2 UPGRADE

Affected: <= 2.8

Fixed in: newer than 2.8

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy ipcs2 || rpm -q ipcs2 || ipcs2 --version

2. UPGRADE to newer than 2.8 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade ipcs2

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade ipcs2

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

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-2023-33757?

ipcs: upgrade to newer than 1.8.5; ipcs: downgrade or apply the listed mitigation; ipcs2: upgrade to newer than 2.8. Exact commands for each OS are on this page.

Is CVE-2023-33757 being exploited?

CVE-2023-33757 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-2023-33757 affect?

CVE-2023-33757 affects ipcs, ipcs, ipcs2. Severity is medium (CVSS 5.9). A lack of SSL certificate validation in Splicecom iPCS (iOS App) v1.3.4, iPCS2 (iOS App) v2.8 and before, and iPCS (Android App) v1.8.5 and before allows attackers to eavesdrop on communications via a man-in-the-middle attack.

How urgent is CVE-2023-33757?

Priority 36/100. Public exploit reference; Remotely exploitable, no login, no user action

Software pages

Android vulnerabilities · iOS vulnerabilities

References

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