What is CVE-2019-12900?

CVE-2019-12900 is a critical-severity software vulnerability (Out-of-bounds write) with a CVSS score of 9.8. BZ2_decompress in decompress.c in bzip2 through 1.0.6 has an out-of-bounds write when there are many selectors.

Is CVE-2019-12900 being actively exploited?

It is not currently in CISA's KEV catalog. Its EPSS exploitation probability is 8%.

What products does CVE-2019-12900 affect?

Tracked products affected include Python. Check the version you run to see whether it is affected.

How do I fix CVE-2019-12900?

Apply the vendor fix promptly. An official patch or advisory is available. Upgrade affected products to a fixed version.

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CVE-2019-12900

CRITICAL severity · CVSS 9.8 · Out-of-bounds write

9.8CVSS CRITICAL

Summary

BZ2_decompress in decompress.c in bzip2 through 1.0.6 has an out-of-bounds write when there are many selectors.

Impact & exploitability

Attack vectorNetwork

Attack complexityLow

Privileges requiredNone

User interactionNone

Confidentiality impactHigh

Integrity impactHigh

Availability impactHigh

Exploit probability (EPSS)8%

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected products we track (1)

Python

Recommendation

Apply the vendor fix promptly. Open any affected product above for its exact safe version.

Official patch: https://gitlab.com/federicomenaquintero/bzip2/commit/74de1e2e6ffc9d51ef9824db71a8ffee5962cdbc ↗

Additional information

NVD record
https://gitlab.com/federicomenaquintero/bzip2/commit/74de1e2e6ffc9d51ef9824db71a8ffee5962cdbcPatch
http://lists.opensuse.org/opensuse-security-announce/2019-07/msg00040.htmlAdvisory
http://lists.opensuse.org/opensuse-security-announce/2019-08/msg00050.htmlAdvisory
http://lists.opensuse.org/opensuse-security-announce/2019-11/msg00078.htmlAdvisory
http://lists.opensuse.org/opensuse-security-announce/2019-12/msg00000.htmlAdvisory
http://packetstormsecurity.com/files/153644/Slackware-Security-Advisory-bzip2-Updates.htmlAdvisory
http://packetstormsecurity.com/files/153957/FreeBSD-Security-Advisory-FreeBSD-SA-19-18.bzip2.htmlAdvisory
https://lists.apache.org/thread.html/ra0adb9653c7de9539b93cc8434143b655f753b9f60580ff260becb2b%40%3Cusers.kafka.apache.org%3E