Description
In Rhonabwy through 1.1.13, HMAC signature verification uses a strcmp function that is vulnerable to side-channel attacks, because it stops the comparison when the first difference is spotted in the two signatures. (The fix uses gnutls_memcmp, which has constant-time execution.)
Scores
CVSS v3
9.8
EPSS
0.0019
EPSS Percentile
40.5%
Attack Vector
NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CISA SSVC
Vulnrichment
Exploitation
none
Automatable
yes
Technical Impact
total
Details
CWE
CWE-1255
CWE-203
Status
published
Products (3)
debian/debian_linux
11.0
debian/debian_linux
12.0
rhonabwy_project/rhonabwy
< 1.1.3
Published
Feb 11, 2024
Tracked Since
Feb 18, 2026