LiveActive security incident?Get immediate response
CVE Record

CVE-2023-52339: In libebml before 1.4.5, an integer overflow in MemIOCallback.cpp can occur when reading or writing.

In libebml before 1.4.5, an integer overflow in MemIOCallback.cpp can occur when reading or writing. It may result in buffer overflows.

MediumCVSS 6.5Not KEV-listedUpdated
Discuss exposureBack to CVEs
Glexia's TakeAutomated analysismoderate

Security readout for executives and security teams

Plain-English summary

CVE-2023-52339 is an integer overflow in libebml before 1.4.5. If triggered while reading or writing EBML data, it may lead to buffer overflows and crash affected software. The main business risk is availability loss in systems that process untrusted media or EBML-like files.

Executive priority

Address in normal vulnerability management cycles, faster for internet-facing or automated file-processing services. This is not supported as actively exploited, but crashes in media-processing workflows can create operational disruption.

Technical view

The flaw is CWE-190 in MemIOCallback.cpp. CVSS 3.1 is 6.5: network-reachable, low complexity, no privileges, user interaction required, with high availability impact and no stated confidentiality or integrity impact. Upstream references indicate the fix landed for libebml 1.4.5.

Likely exposure

Exposure is most likely where libebml before 1.4.5 is installed, linked, or bundled into software that reads or writes EBML data from users, partners, uploads, or automated feeds. The source bundle does not enumerate specific downstream applications beyond distro package advisories.

Exploitation context

The bundle provides no evidence of active exploitation, and KEV status is false. The CVSS vector requires user interaction, so practical risk depends on whether an affected application processes attacker-controlled files or data paths.

Researcher notes

Focus validation on MemIOCallback.cpp behavior and package provenance. The public description states overflow may result in buffer overflows, but the bundle does not provide exploit maturity, affected CPEs, or a complete downstream product list.

Mitigation direction

  • Upgrade libebml to 1.4.5 or a vendor-patched package.
  • Apply relevant Fedora or Debian security updates where used.
  • Identify software that bundles libebml rather than using system packages.
  • Restrict processing of untrusted EBML files until affected components are updated.

Validation and detection

  • Inventory installed libebml versions and statically bundled copies.
  • Confirm vendor package versions include the CVE-2023-52339 fix.
  • Review applications that read or write EBML data for dependency linkage.
  • Treat version 1.4.4 or earlier as exposed unless backport evidence exists.
Prepared
Confidence
high
Sources
9

Public sources used

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.

Potential ATT&CK relevance

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 · low confidence lookup

CWE-190: 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 lookup
cve · low confidence lookup

CVE-2023-52339 mapping review

Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.

Open ATT&CK lookup
Vulnerability profileCVE Program record
Severity
Medium
CVSS
6.5 (3.1)
Known Exploited
No
Published

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

Official CVE source material

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.

1CVSS vectors
0Timeline events
0ADP providers
10Source links

CVSS vector scores

1 official score

We 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.

ScoreVersionSeverityVectorExploitImpactSource
6.5CVSS 3.1MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H2.83.6Primary CVE score

Vulnerability scoring details

Base CVSS 3.1 score

6.5Medium
CVSS 3.1 vector shape for CVE-2023-52339Attack VectorAttack ComplexityPrivileges RequiredUser InteractionScopeConfidentiality ImpactIntegrity ImpactAvailability Impact

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

Attack Vector
NetworkAdjacentLocalPhysical
Attack Complexity
LowHigh
Privileges Required
NoneLowHigh
User Interaction
NoneRequired
Scope
ChangedUnchanged
Confidentiality Impact
HighLowNone
Integrity Impact
HighLowNone
Availability Impact
HighLowNone

Source materials

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus
n/an/an/aListed
Weakness

CWE details

CWE-190

CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.

CWE-190 · source CWE mapping

Integer Overflow or Wraparound

Integer Overflow or Wraparound represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.

Open CWE intelligenceSame-CWE CVEs