Security readout for executives and security teams
Plain-English summary
CVE-2023-6780 is a glibc logging-library bug triggered by extremely long messages sent through syslog-style functions. It can cause incorrect memory sizing and undefined behavior, with the published CVSS emphasizing limited availability impact. It is not in CISA KEV, and the provided sources do not show active exploitation.
Executive priority
Treat as a routine but important Linux platform update. Prioritize internet-facing services or products that process untrusted input and rely on syslog logging. This is not currently KEV-listed, so it should not displace confirmed exploited vulnerabilities unless your exposure is concentrated.
Technical view
An integer overflow in glibc __vsyslog_internal, used by syslog and vsyslog, can miscalculate the buffer needed for very long messages. The CVE describes affected glibc 2.37 and newer. The bundle lists Fedora as affected and Red Hat Enterprise Linux 6 through 9 glibc packages as unaffected.
Likely exposure
Exposure is most likely on Linux systems using affected glibc releases, especially distributions with vendor advisories such as Fedora or Gentoo. Risk depends on whether local or network-facing applications log attacker-influenced, very long strings through syslog or vsyslog.
Exploitation context
Public technical disclosures exist, but the source bundle does not establish active exploitation. CVSS indicates network-reachable, low-complexity conditions with no privileges or user interaction, but practical impact depends on an application path that passes oversized data into vulnerable logging calls.
Researcher notes
Evidence supports an integer overflow and undefined behavior in __vsyslog_internal for very long messages. The exact real-world impact is application-dependent. Avoid assuming all glibc deployments are affected; the provided Red Hat entries are explicitly unaffected, while Fedora is listed affected.
Mitigation direction
- Apply distribution glibc security updates where vendor advisories mark the platform affected.
- Check Fedora and Gentoo advisories for fixed package versions and deployment guidance.
- For Red Hat Enterprise Linux 6-9, note the provided Red Hat status is unaffected.
- For appliances or embedded products, follow the vendor advisory rather than assuming upstream status.
- Restart affected services after glibc updates if vendor guidance requires it.
Validation and detection
- Inventory systems and appliances using glibc 2.37 or newer.
- Map Linux distribution advisories to installed glibc package versions.
- Identify applications that log attacker-controlled long input through syslog or vsyslog.
- Confirm vendor status for Red Hat, Fedora, Gentoo, NetApp, and Siemens assets as applicable.
- Verify patched package deployment through approved vulnerability or configuration management tooling.
Public sources used
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
These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.
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-131: Exact CWE lookup
Use the exact CWE identifier as the starting point before reviewing related ATT&CK behavior. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.
Open ATT&CK lookupCVE-2023-6780 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
- Medium
- CVSS
- 5.3 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
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.
SSVC decision data
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:N/I:N/A:L3.91.4redhatVulnerability scoring details
Base CVSS 3.1 score
5.3MediumVector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
Vulnerability timeline
Timeline events are normalized from CVE metadata, CNA source timelines, ADP timelines, and KEV metadata when present.
- Source timelineredhat
Reported to Red Hat.
- CVE reservedCVE Program
The CVE ID was reserved by the assigning CNA.
- Source timelineredhat
Made public.
- CVE publishedCVE Program
The CVE record was published.
- CVE updatedCVE Program
The CVE record metadata indicates this as the latest update time.
ADP provider summaries
Source materials
- CVE List V5 sourceCVE List V5
- https://access.redhat.com/security/cve/CVE-2023-6780CVE reference, redhat · vdb-entry, x_refsource_REDHAT
- RHBZ#2254396CVE reference, redhat · issue-tracking, x_refsource_REDHAT
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/D2FIH77VHY3KCRROCXOT6L27WMZXSJ2G/CVE reference, redhat
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/MWQ6BZJ6CV5UAW4VZSKJ6TO4KIW2KWAQ/CVE reference, redhat
- https://security.gentoo.org/glsa/202402-01CVE reference, redhat
- https://www.openwall.com/lists/oss-security/2024/01/30/6CVE reference, redhat
- https://www.qualys.com/2024/01/30/cve-2023-6246/syslog.txtCVE reference, redhat
- https://security.netapp.com/advisory/ntap-20250207-0010/CVE reference, CVE
- https://cert-portal.siemens.com/productcert/html/ssa-082556.htmlCVE reference, siemens-SADP
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 Calculation of Buffer Size
Incorrect Calculation of Buffer Size represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.