Gentoo FoundationGLSA-200901-10GnuTLS: Certificate validation error
5.9 Medium
CVSS3
Attack Vector
NETWORK
Attack Complexity
HIGH
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
HIGH
Availability Impact
NONE
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N
4.3 Medium
CVSS2
Access Vector
NETWORK
Access Complexity
MEDIUM
Authentication
NONE
Confidentiality Impact
NONE
Integrity Impact
PARTIAL
Availability Impact
NONE
AV:N/AC:M/Au:N/C:N/I:P/A:N
0.002 Low
EPSS
Percentile
55.6%
Background
GnuTLS is an open-source implementation of TLS 1.0 and SSL 3.0.
Description
Martin von Gagern reported that the _gnutls_x509_verify_certificate() function in lib/x509/verify.c trusts certificate chains in which the last certificate is an arbitrary trusted, self-signed certificate.
Impact
A remote attacker could exploit this vulnerability and spoof arbitrary names to conduct Man-In-The-Middle attacks and intercept sensitive information.
Workaround
There is no known workaround at this time.
Resolution
All GnuTLS users should upgrade to the latest version:
# emerge --sync
# emerge --ask --oneshot --verbose ">=net-libs/gnutls-2.4.1-r2"
| OS | Version | Architecture | Package | Version | Filename |
|---|---|---|---|---|---|
| Gentoo | any | all | net-libs/gnutls | <Β 2.4.1-r2 | UNKNOWN |
Related
5.9 Medium
CVSS3
Attack Vector
NETWORK
Attack Complexity
HIGH
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
HIGH
Availability Impact
NONE
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N
4.3 Medium
CVSS2
Access Vector
NETWORK
Access Complexity
MEDIUM
Authentication
NONE
Confidentiality Impact
NONE
Integrity Impact
PARTIAL
Availability Impact
NONE
AV:N/AC:M/Au:N/C:N/I:P/A:N
0.002 Low
EPSS
Percentile
55.6%