CVE-2017-12143: In libquicktime 1.2.4, an allocation failure was found in the function quicktime_read_info in lqt_quicktime.c,

Routine

MEDIUM 6.5DOWNGRADE

CVE-2017-12143 is a medium-severity flaw (CVSS 6.5) affecting libquicktime. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

In libquicktime 1.2.4, an allocation failure was found in the function quicktime_read_info in lqt_quicktime.c, which allows attackers to cause a denial of service via a crafted file.

Why this priority

No elevated risk signals yet

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	1.0% (top 36%)
CISA exploited list	No
Weakness	CWE-20
Published	2017-08-02
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: libquicktime

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

Am I affected?

Timeline

2017-08-02 05:29 UTCPublished CVE record published
2026-06-17 01:02 UTCUpdated Record last modified

libquicktime libquicktime DOWNGRADE

Affected: 1.2.4

Fixed in: no fixed release known

Safe to downgrade to: a release before 1.2.4

1. Check installed version

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

2. No fixed release: DOWNGRADE to a release before 1.2.4 (Debian / Ubuntu)

apt-cache madison libquicktime sudo apt install libquicktime=<VERSION_BEFORE_1.2.4> sudo apt-mark hold libquicktime

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

dnf --showduplicates list libquicktime sudo dnf downgrade libquicktime-<VERSION_BEFORE_1.2.4> sudo dnf versionlock add libquicktime

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-2017-12143?

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

Is CVE-2017-12143 being exploited?

CVE-2017-12143 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-2017-12143 affect?

CVE-2017-12143 affects libquicktime. Severity is medium (CVSS 6.5). In libquicktime 1.2.4, an allocation failure was found in the function quicktime_read_info in lqt_quicktime.c, which allows attackers to cause a denial of service via a crafted file.

How urgent is CVE-2017-12143?

Priority 39/100. No elevated risk signals yet.

Related CVEs

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CVE-2017-9126 MEDIUM 6.5 DOWNGRADE The quicktime_read_dref_table function in dref.c in libquicktime 1.2.4 allows remote attackers to cause a deni
CVE-2017-9125 MEDIUM 6.5 DOWNGRADE The lqt_frame_duration function in lqt_quicktime.c in libquicktime 1.2.4 allows remote attackers to cause a de
CVE-2017-9124 MEDIUM 6.5 DOWNGRADE The quicktime_match_32 function in util.c in libquicktime 1.2.4 allows remote attackers to cause a denial of s

References

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