Medium severity · published Aug 22, 2018
CVE-2018-10844
It was found that the GnuTLS implementation of HMAC-SHA-256 was vulnerable to a Lucky thirteen style attack
5.9
CVSS
3.6%
EPSS
No
On KEV
Description
It was found that the GnuTLS implementation of HMAC-SHA-256 was vulnerable to a Lucky thirteen style attack. Remote attackers could use this flaw to conduct distinguishing attacks and plaintext-recovery attacks via statistical analysis of timing data using crafted packets.
CVSS vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N
Attack vector
Network
Complexity
High
Privileges
None
User interaction
None
Confidentiality
High
Integrity
None
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)3.6% · higher than 89% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
GN
Gnutls · Gnu
before 3.6.12 · source: vendor, NVD
DL
Debian Linux · Debian
8.0 · source: NVD
EL
Enterprise Linux Desktop · Redhat
7.0 · source: NVD
EL
Enterprise Linux Server · Redhat
7.0 · source: NVD
EL
Enterprise Linux Workstation · Redhat
7.0 · source: NVD
FE
Fedora · Fedoraproject
31; 32 · source: NVD
UL
Ubuntu Linux · Canonical
16.04; 18.04; 18.10; 19.04 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2018-10844
CVE.org
https://www.cve.org/CVERecord?id=CVE-2018-10844
Third Party Advisory
http://www.securityfocus.com/bid/105138
Third Party Advisory
https://access.redhat.com/errata/RHSA-2018:3050
Broken Link
https://access.redhat.com/errata/RHSA-2018:3505
Issue Tracking
https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2018-10844
Third Party Advisory
https://eprint.iacr.org/2018/747
Issue Tracking
https://gitlab.com/gnutls/gnutls/merge_requests/657
More from gnutls
5.9
CVE-2018-10845
It was found that the GnuTLS implementation of HMAC-SHA-384 was vulnerable to a Lucky thirteen style attack
5.6
CVE-2018-10846
A cache-based side channel in GnuTLS implementation that leads to plain text recovery in cross-VM attack setting was found