CVE-2019-12900

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

Published: 2019-06-19 Last update: 2025-06-09 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2019-12900 is rated High Risk (66.5/100): CVSS Critical severity, with medium exploitation likelihood (EPSS 1.13%). High exploitation likelihood—assess exposure and prioritize remediation.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2019-12900

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-03-24 1.16% 1.13% -0.03%
2 2026-03-21 1.13% 1.16% +0.03%
3 2025-12-28 — 1.13% —

Full EPSS history (54 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2019-12900

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
9.8 3.1 CRITICAL
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:H)
Serious risk that confidential data gets exposed in a big way.
Integrity (I:H)
They could widely tamper with or forge data—trust in the data is badly hurt.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 3.9 5.9 [email protected]
9.8 3.1 CRITICAL
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:H)
Serious risk that confidential data gets exposed in a big way.
Integrity (I:H)
They could widely tamper with or forge data—trust in the data is badly hurt.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 3.9 5.9 134c704f-9b21-4f2e-91b3-4a467353bcc0
7.5 2.0 HIGH
AV:N/AC:L/Au:N/C:P/I:P/A:P Click to expand
Access vector (AV:N)
Can be exploited remotely over network reachability.
Access complexity (AC:L)
Exploitation conditions are straightforward and predictable.
Authentication (AU:N)
No authentication is required.
Confidentiality impact (C:P)
Partial confidentiality impact.
Integrity impact (I:P)
Partial integrity impact.
Availability impact (A:P)
Partial availability impact.
 10.0 6.4 [email protected]

Weakness enumeration for CVE-2019-12900

OS Trackers for CVE-2019-12900

vendor priority summary link
alpine — CVE-2019-12900: 1 source package rows (bzip2); 15 state rows across 10 repos (3.10-main, 3.11-main, 3.12-main, 3.17-main, 3.18-main, 3.19-main, 3.20-main, 3.21-main, 3.22-main, edge-main); fixed 10, open 5. https://security.alpinelinux.org/vuln/CVE-2019-12900
debian not yet assigned CVE-2019-12900 not yet assigned priority: Debian including 2 source packages (bzip2, clamav), 10 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 10. https://security-tracker.debian.org/tracker/CVE-2019-12900
redhat medium — https://access.redhat.com/security/cve/CVE-2019-12900
suse medium CVE-2019-12900 severity moderate: SUSE including 448 source package names (0.1.0:libbz2-1-1.0.6-5.9.1, 0.1.75:libbz2-1-1.0.6-5.9.1, …), 760 product×package rows across 238 product lines (Container bci/bci-init, Container bci/bci-minimal, … (238 product lines)): Fixed 603, Known Affected 157. https://www.suse.com/security/cve/CVE-2019-12900/
ubuntu medium CVE-2019-12900 medium priority: Ubuntu including 2 source packages (bzip2, clamav), 11 status rows across 6 suites (bionic, cosmic, disco, trusty, upstream, xenial): released 11. https://ubuntu.com/security/CVE-2019-12900

Affected software / configurations for CVE-2019-12900

Vendor Product Version Raw CPE
bzip bzip2 <= 1.0.6 cpe:2.3:a:bzip:bzip2:*:*:*:*:*:*:*:*
debian debian_linux 8.0 cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:*
opensuse leap 15.0 cpe:2.3:o:opensuse:leap:15.0:*:*:*:*:*:*:*
opensuse leap 15.1 cpe:2.3:o:opensuse:leap:15.1:*:*:*:*:*:*:*
canonical ubuntu_linux 12.04 cpe:2.3:o:canonical:ubuntu_linux:12.04:*:*:*:*:*:*:*
canonical ubuntu_linux 14.04 cpe:2.3:o:canonical:ubuntu_linux:14.04:*:*:*:esm:*:*:*
canonical ubuntu_linux 16.04 cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:esm:*:*:*
canonical ubuntu_linux 18.04 cpe:2.3:o:canonical:ubuntu_linux:18.04:*:*:*:lts:*:*:*
canonical ubuntu_linux 19.04 cpe:2.3:o:canonical:ubuntu_linux:19.04:*:*:*:*:*:*:*
freebsd freebsd 11.2 cpe:2.3:o:freebsd:freebsd:11.2:-:*:*:*:*:*:*
freebsd freebsd 11.2 cpe:2.3:o:freebsd:freebsd:11.2:p10:*:*:*:*:*:*
freebsd freebsd 11.2 cpe:2.3:o:freebsd:freebsd:11.2:p11:*:*:*:*:*:*
freebsd freebsd 11.2 cpe:2.3:o:freebsd:freebsd:11.2:p12:*:*:*:*:*:*
freebsd freebsd 11.2 cpe:2.3:o:freebsd:freebsd:11.2:p2:*:*:*:*:*:*
freebsd freebsd 11.2 cpe:2.3:o:freebsd:freebsd:11.2:p3:*:*:*:*:*:*
freebsd freebsd 11.2 cpe:2.3:o:freebsd:freebsd:11.2:p4:*:*:*:*:*:*
freebsd freebsd 11.2 cpe:2.3:o:freebsd:freebsd:11.2:p5:*:*:*:*:*:*
freebsd freebsd 11.2 cpe:2.3:o:freebsd:freebsd:11.2:p6:*:*:*:*:*:*
freebsd freebsd 11.2 cpe:2.3:o:freebsd:freebsd:11.2:p7:*:*:*:*:*:*
freebsd freebsd 11.2 cpe:2.3:o:freebsd:freebsd:11.2:p8:*:*:*:*:*:*
freebsd freebsd 11.2 cpe:2.3:o:freebsd:freebsd:11.2:p9:*:*:*:*:*:*
freebsd freebsd 11.2 cpe:2.3:o:freebsd:freebsd:11.2:rc3:*:*:*:*:*:*
freebsd freebsd 11.3 cpe:2.3:o:freebsd:freebsd:11.3:-:*:*:*:*:*:*
freebsd freebsd 11.3 cpe:2.3:o:freebsd:freebsd:11.3:p1:*:*:*:*:*:*
freebsd freebsd 12.0 cpe:2.3:o:freebsd:freebsd:12.0:-:*:*:*:*:*:*
freebsd freebsd 12.0 cpe:2.3:o:freebsd:freebsd:12.0:p1:*:*:*:*:*:*
freebsd freebsd 12.0 cpe:2.3:o:freebsd:freebsd:12.0:p2:*:*:*:*:*:*
freebsd freebsd 12.0 cpe:2.3:o:freebsd:freebsd:12.0:p3:*:*:*:*:*:*
freebsd freebsd 12.0 cpe:2.3:o:freebsd:freebsd:12.0:p4:*:*:*:*:*:*
freebsd freebsd 12.0 cpe:2.3:o:freebsd:freebsd:12.0:p5:*:*:*:*:*:*
freebsd freebsd 12.0 cpe:2.3:o:freebsd:freebsd:12.0:p6:*:*:*:*:*:*
freebsd freebsd 12.0 cpe:2.3:o:freebsd:freebsd:12.0:p7:*:*:*:*:*:*
freebsd freebsd 12.0 cpe:2.3:o:freebsd:freebsd:12.0:p8:*:*:*:*:*:*
python python >= 3.7.0, < 3.7.13 cpe:2.3:a:python:python:*:*:*:*:*:*:*:*
python python >= 3.8.0, < 3.8.13 cpe:2.3:a:python:python:*:*:*:*:*:*:*:*
python python >= 3.9.0, < 3.9.11 cpe:2.3:a:python:python:*:*:*:*:*:*:*:*
python python >= 3.10.0, < 3.10.3 cpe:2.3:a:python:python:*:*:*:*:*:*:*:*

References for CVE-2019-12900

URL Tags
http://lists.opensuse.org/opensuse-security-announce/2019-07/msg00040.html Mailing List Third Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2019-08/msg00050.html Mailing List Third Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2019-11/msg00078.html Mailing List Third Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2019-12/msg00000.html Mailing List Third Party Advisory
http://packetstormsecurity.com/files/153644/Slackware-Security-Advisory-bzip2-Updates.html Third Party Advisory VDB Entry
http://packetstormsecurity.com/files/153957/FreeBSD-Security-Advisory-FreeBSD-SA-19-18.bzip2.html Third Party Advisory VDB Entry
https://gitlab.com/federicomenaquintero/bzip2/commit/74de1e2e6ffc9d51ef9824db71a8ffee5962cdbc Patch Vendor Advisory
https://lists.apache.org/thread.html/ra0adb9653c7de9539b93cc8434143b655f753b9f60580ff260becb2b%40%3Cusers.kafka.apache.org%3E
https://lists.apache.org/thread.html/rce8cd8c30f60604b580ea01bebda8a671a25c9a1629f409fc24e7774%40%3Cuser.flink.apache.org%3E
https://lists.apache.org/thread.html/rda98305669476c4d90cc8527c4deda7e449019dd1fe9936b56671dd4%40%3Cuser.flink.apache.org%3E
https://lists.debian.org/debian-lts-announce/2019/06/msg00021.html Mailing List Third Party Advisory
https://lists.debian.org/debian-lts-announce/2019/07/msg00014.html Mailing List Third Party Advisory
https://lists.debian.org/debian-lts-announce/2019/10/msg00012.html Mailing List Third Party Advisory
https://lists.debian.org/debian-lts-announce/2019/10/msg00018.html Mailing List Third Party Advisory
https://seclists.org/bugtraq/2019/Aug/4 Mailing List Patch Third Party Advisory
https://seclists.org/bugtraq/2019/Jul/22 Mailing List Third Party Advisory
https://security.FreeBSD.org/advisories/FreeBSD-SA-19:18.bzip2.asc Patch Third Party Advisory
https://support.f5.com/csp/article/K68713584?utm_source=f5support&amp%3Butm_medium=RSS
https://usn.ubuntu.com/4038-1/ Third Party Advisory
https://usn.ubuntu.com/4038-2/ Third Party Advisory
https://usn.ubuntu.com/4146-1/ Third Party Advisory
https://usn.ubuntu.com/4146-2/ Third Party Advisory
https://www.oracle.com/security-alerts/cpuoct2020.html Patch Third Party Advisory
cvelogic Threat Intelligence