Heap overflow in KSL checksum initialization

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-79900
StatePUBLISHED
AssignerFortra
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-10-01 15:17:31 UTC
Updated2026-10-01 20:34:26 UTC
Descriptionboks_ksllogsd accepts a checksum algorithm name in the MD field of an authenticated KSL start message. Affected releases verify that OpenSSL recognizes the digest name but do not verify that the value fits in a fixed 16-byte checksum context field before copying it. An authenticated KSL client can supply an oversized, OpenSSL-recognized digest name and write beyond the end of the heap allocation.

Risk And Classification

Primary CVSS: v3.1 6.5 MEDIUM from df4dee71-de3a-4139-9588-11b62fe6c0ff

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

Problem Types: CWE-787 | CWE-787 CWE-787 Out-of-bounds write

VersionSourceTypeScoreSeverityVector
3.1df4dee71-de3a-4139-9588-11b62fe6c0ffSecondary6.5MEDIUMCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
3.1CNACVSS6.5MEDIUMCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High

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

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Fortra BoKS Manager Boks-server affected 8.1.0.24 semver Not specified
CNA Fortra BoKS Manager Boks-server affected 9.0.0.7 semver Not specified

References

ReferenceSourceLinkTags
www.fortra.com/security/advisories/product-security/fi-2026-013 df4dee71-de3a-4139-9588-11b62fe6c0ff www.fortra.com
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

Additional Advisory Data

Solutions

CNA: Upgrade to boks-server 8.1.0.24 or boks-server 9.0.0.7, as appropriate for the installed maintenance line, and ensure the updated boks_ksllogsd is running.

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