Security readout for executives and security teams
CVE-2019-12900 is a memory corruption flaw in bzip2 decompression through version 1.0.6. A specially crafted compressed file with many selectors can trigger an out-of-bounds write. Because bzip2 is commonly embedded in operating systems and tools, exposure can appear through any workflow that decompresses untrusted .bz2 data. Likely exposure is systems, appliances, scanners, or applications using bzip2/libbzip2 through 1.0.6 to process untrusted compressed data. The bundle also references downstream products or packages that incorporated bzip2 fixes, including operating system distributions and ClamAV updates. Treat this as high-priority legacy exposure cleanup. The issue is old, but the affected component is widespread and may persist in long-lived systems, appliances, containers, and embedded dependencies. Prioritize internet-facing or automation-heavy environments that process untrusted compressed files. Mitigation focus: Upgrade bzip2/libbzip2 using vendor-supported packages for affected operating systems.; Patch downstream products that bundle or statically link vulnerable bzip2 code.; Prioritize systems that decompress externally supplied archives or mail/file attachments..
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
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ATT&CK lookup starting points
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Open ATT&CK lookupCVE-2019-12900 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- Critical
- CVSS
- 9.8 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
CVSS vector scores
1 official scoreWe collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H3.95.9Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
9.8CriticalVector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Source materials
- CVE List V5 sourceCVE List V5
- [debian-lts-announce] 20190624 [SECURITY] [DLA 1833-1] bzip2 security updateCVE reference · mailing-list, x_refsource_MLIST
- USN-4038-2CVE reference · vendor-advisory, x_refsource_UBUNTU
- USN-4038-1CVE reference · vendor-advisory, x_refsource_UBUNTU
- 20190715 [slackware-security] bzip2 (SSA:2019-195-01)CVE reference · mailing-list, x_refsource_BUGTRAQ
- [debian-lts-announce] 20190718 [SECURITY] [DLA 1833-2] bzip2 regression updateCVE reference · mailing-list, x_refsource_MLIST
- FreeBSD-SA-19:18CVE reference · vendor-advisory, x_refsource_FREEBSD
- 20190806 FreeBSD Security Advisory FreeBSD-SA-19:18.bzip2CVE reference · mailing-list, x_refsource_BUGTRAQ
- USN-4146-1CVE reference · vendor-advisory, x_refsource_UBUNTU
- USN-4146-2CVE reference · vendor-advisory, x_refsource_UBUNTU
- [debian-lts-announce] 20191010 [SECURITY] [DLA 1953-1] clamav security updateCVE reference · mailing-list, x_refsource_MLIST
- [debian-lts-announce] 20191014 [SECURITY] [DLA 1953-2] clamav regression updateCVE reference · mailing-list, x_refsource_MLIST
- [kafka-users] 20200413 CVEs for the dependency software guava and rocksdbjni of KafkaCVE reference · mailing-list, x_refsource_MLIST
- https://www.oracle.com/security-alerts/cpuoct2020.htmlCVE reference · x_refsource_MISC
- https://gitlab.com/federicomenaquintero/bzip2/commit/74de1e2e6ffc9d51ef9824db71a8ffee5962cdbcCVE reference · x_refsource_MISC
- https://support.f5.com/csp/article/K68713584?utm_source=f5support&%3Butm_medium=RSSCVE reference · x_refsource_CONFIRM
- [flink-user] 20210716 Flink 1.13.1 - Vulnerabilities CVE-2019-12900 for librocksdbjniCVE reference · mailing-list, x_refsource_MLIST
- [flink-user] 20210717 Re: Flink 1.13.1 - Vulnerabilities CVE-2019-12900 for librocksdbjniCVE reference · mailing-list, x_refsource_MLIST
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.
Out-of-bounds Write
Out-of-bounds Write represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.