CVE-2017-8941: The Interval International app 3.3 through 3.5.1 for iOS does not verify X.509 certificates from SSL servers,

Routine

MEDIUM 5.9REMOTEDOWNGRADE

CVE-2017-8941 is a medium-severity flaw (CVSS 5.9) affecting interval international. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

The Interval International app 3.3 through 3.5.1 for iOS does not verify X.509 certificates from SSL servers, which allows man-in-the-middle attackers to spoof servers and obtain sensitive information via a crafted certificate.

Why this priority

Remotely exploitable, no login, no user action

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

Risk facts

CVSS score	5.9 (Medium)
Attack vector	Network (remote)
Attack complexity	High
Privileges needed	None
User interaction	None
EPSS exploit chance	0.6% (top 52%)
CISA exploited list	No
Weakness	CWE-295
Published	2017-05-15
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: interval international

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

Am I affected?

Timeline

2017-05-15 18:29 UTCPublished CVE record published
2026-06-17 01:27 UTCUpdated Record last modified

interval international interval international DOWNGRADE

Affected: 3.3 · 3.4 · 3.5 · 3.5.1

Fixed in: no fixed release known

Safe to downgrade to: a release before 3.3

1. Check installed version

apt-cache policy interval-international || rpm -q interval-international || interval-international --version

2. No fixed release: DOWNGRADE to a release before 3.3 (Debian / Ubuntu)

apt-cache madison interval-international sudo apt install interval-international=<VERSION_BEFORE_3.3> sudo apt-mark hold interval-international

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

dnf --showduplicates list interval-international sudo dnf downgrade interval-international-<VERSION_BEFORE_3.3> sudo dnf versionlock add interval-international

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-2017-8941?

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

Is CVE-2017-8941 being exploited?

CVE-2017-8941 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-2017-8941 affect?

CVE-2017-8941 affects interval international. Severity is medium (CVSS 5.9). The Interval International app 3.3 through 3.5.1 for iOS does not verify X.509 certificates from SSL servers, which allows man-in-the-middle attackers to spoof servers and obtain sensitive information via a crafted certificate.

How urgent is CVE-2017-8941?

Priority 38/100. Remotely exploitable, no login, no user action

Software pages

iOS vulnerabilities

References

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