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freebsdFreeBSD0A7A5DFB-ABA4-11ED-BE2C-001CC0382B2F
HistoryFeb 10, 2023 - 12:00 a.m.

GnuTLS -- timing sidechannel in RSA decryption

2023-02-1000:00:00
vuxml.freebsd.org
26
gnutls
timing sidechannel
rsa decryption
vulnerability
response times
pkcs#1 v1.5 padding
tls
ciphertext processing
unix

CVSS3

7.4

Attack Vector

NETWORK

Attack Complexity

HIGH

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

NONE

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

EPSS

0.002

Percentile

57.1%

The GnuTLS project reports:

A vulnerability was found that the response times to malformed RSA
ciphertexts in ClientKeyExchange differ from response times of
ciphertexts with correct PKCS#1 v1.5 padding. Only TLS ciphertext
processing is affected.

OSVersionArchitecturePackageVersionFilename
FreeBSDanynoarchgnutls< 3.7.9UNKNOWN

CVSS3

7.4

Attack Vector

NETWORK

Attack Complexity

HIGH

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

NONE

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

EPSS

0.002

Percentile

57.1%