CVE-2009-5138: n/a vulnerability

CVE-2009-5138: GnuTLS before 2.7.6, when the GNUTLS_VERIFY_ALLOW_X509_V1_CA_CRT flag is not enabled, treats version 1 X.50...

GnuTLS before 2.7.6, when the GNUTLS_VERIFY_ALLOW_X509_V1_CA_CRT flag is not enabled, treats version 1 X.509 certificates as intermediate CAs, which allows remote attackers to bypass intended restrictions by leveraging a X.509 V1 certificate from a trusted CA to issue new certificates, a different vulnerability than CVE-2014-1959.

UnknownCVSS not scoredNot KEV-listedUpdatedAug 7, 2024, 07:32 UTC (UTC+00:00)

Security readout for executives and security teams

This flaw affects older GnuTLS certificate validation. A trusted version 1 X.509 certificate could be treated as if it could sign other certificates, letting an attacker bypass intended trust restrictions. Business impact is highest where affected GnuTLS versions protect sensitive client or server TLS connections. Exposure is likely limited to systems, appliances, or applications using GnuTLS before 2.7.6 for certificate verification. Prioritize internet-facing services, clients validating remote TLS endpoints, and distributions referenced by vendor advisories. Treat as high priority for legacy estate review, especially where old Linux distributions or embedded products still handle TLS. No active exploitation is shown in the provided sources, but certificate trust bypass can undermine core security controls. Mitigation focus: Upgrade or apply vendor-supported GnuTLS packages that address CVE-2009-5138.; Check Red Hat, SUSE, and distribution advisories for backported fixes.; Inventory applications statically or dynamically linked against vulnerable GnuTLS versions..

Prepared: Jun 14, 2026, 14:32 UTC (UTC+00:00)

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

Potential ATT&CK relevance

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Vulnerability profileCVE Program record

Severity: Unknown
CVSS: Not scored
Known Exploited: No
Published: Mar 6, 2014, 18:00 UTC (UTC+00:00)

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.

0CVSS vectors

0Timeline events

0ADP providers

3Source links

CVSS and timeline data

No CVSS vectors or timeline events were available in the normalized CVE source material.

Source materials

CVE List V5 sourceCVE List V5
https://gitorious.org/gnutls/gnutls/commit/c8dcbedd1fdc312f5b1a70fcfbc1afe235d800cdCVE reference · x_refsource_CONFIRM
https://bugzilla.redhat.com/show_bug.cgi?id=1069301CVE reference · x_refsource_CONFIRM

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus

n/an/an/aListed

Weakness

CWE details

No CWE listed

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