Security readout for executives and security teams
CVE-2016-9842 is a zlib 1.2.8 flaw in decompression handling. If vulnerable software processes attacker-controlled compressed data, the impact is listed as potentially severe but unspecified. The record does not show active exploitation, and the affected-product metadata is incomplete, so exposure depends on where zlib 1.2.8 is present or bundled. Exposure is most likely in systems, appliances, containers, or applications using zlib 1.2.8, especially where compressed untrusted input is decompressed. The CVE affected list is n/a, so inventory must include OS packages and bundled or statically linked copies. Treat as high priority where zlib handles external compressed data, because zlib is common and the CVSS impact is severe. Do not assume universal exposure from the CVE alone; require inventory confirmation and vendor-update tracking. Mitigation focus: Identify zlib versions in operating systems, containers, appliances, and application dependencies.; Apply relevant vendor security updates for zlib or affected downstream packages.; Check products that bundle or statically link zlib, not only OS package inventories..
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
Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.
CWE-1335: Exact CWE lookup
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Open ATT&CK lookupCVE-2016-9842 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
- High
- CVSS
- 8.8 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/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:R/S:U/C:H/I:H/A:H2.85.9Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
8.8HighVector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Source materials
- CVE List V5 sourceCVE List V5
- RHSA-2017:1221CVE reference · vendor-advisory, x_refsource_REDHAT
- RHSA-2017:1220CVE reference · vendor-advisory, x_refsource_REDHAT
- RHSA-2017:3047CVE reference · vendor-advisory, x_refsource_REDHAT
- RHSA-2017:3046CVE reference · vendor-advisory, x_refsource_REDHAT
- GLSA-201701-56CVE reference · vendor-advisory, x_refsource_GENTOO
- RHSA-2017:1222CVE reference · vendor-advisory, x_refsource_REDHAT
- RHSA-2017:3453CVE reference · vendor-advisory, x_refsource_REDHAT
- RHSA-2017:2999CVE reference · vendor-advisory, x_refsource_REDHAT
- [debian-lts-announce] 20190324 [SECURITY] [DLA 1725-1] rsync security updateCVE reference · mailing-list, x_refsource_MLIST
- USN-4246-1CVE reference · vendor-advisory, x_refsource_UBUNTU
- [debian-lts-announce] 20200129 [SECURITY] [DLA 2085-1] zlib security updateCVE reference · mailing-list, x_refsource_MLIST
- USN-4292-1CVE reference · vendor-advisory, x_refsource_UBUNTU
- https://www.oracle.com/security-alerts/cpujul2020.htmlCVE reference · x_refsource_MISC
- https://support.apple.com/HT208144CVE reference · x_refsource_CONFIRM
- https://wiki.mozilla.org/MOSS/Secure_Open_Source/Completed#zlibCVE reference · x_refsource_MISC
- https://support.apple.com/HT208113CVE reference · x_refsource_CONFIRM
- https://support.apple.com/HT208112CVE reference · x_refsource_CONFIRM
- https://support.apple.com/HT208115CVE reference · x_refsource_CONFIRM
- https://wiki.mozilla.org/images/0/09/Zlib-report.pdfCVE reference · x_refsource_MISC
- https://bugzilla.redhat.com/show_bug.cgi?id=1402348CVE reference · x_refsource_CONFIRM
- https://github.com/madler/zlib/commit/e54e1299404101a5a9d0cf5e45512b543967f958CVE reference · x_refsource_CONFIRM
- GLSA-202007-54CVE reference · vendor-advisory, x_refsource_GENTOO
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.
Incorrect Bitwise Shift of Integer
Incorrect Bitwise Shift of Integer represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.