CVE-2018-10846

NameCVE-2018-10846
DescriptionA cache-based side channel in GnuTLS implementation that leads to plain text recovery in cross-VM attack setting was found. An attacker could use a combination of "Just in Time" Prime+probe attack in combination with Lucky-13 attack to recover plain text using crafted packets.
SourceCVE (at NVD; CERT, LWN, oss-sec, fulldisc, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more)
ReferencesDLA-1560-1

Vulnerable and fixed packages

The table below lists information on source packages.

Source PackageReleaseVersionStatus
gnutls28 (PTS)buster3.6.7-4+deb10u8fixed
buster (security)3.6.7-4+deb10u12fixed
bullseye3.7.1-5+deb11u4fixed
bullseye (security)3.7.1-5+deb11u3fixed
bookworm3.7.9-2+deb12u2fixed
trixie3.8.3-1fixed
sid3.8.3-1.1fixed

The information below is based on the following data on fixed versions.

PackageTypeReleaseFixed VersionUrgencyOriginDebian Bugs
gnutls26source(unstable)(unfixed)
gnutls28sourceexperimental3.6.3-1
gnutls28sourcejessie3.3.30-0+deb8u1DLA-1560-1
gnutls28sourcestretch3.5.8-5+deb9u4
gnutls28source(unstable)3.5.19-1

Notes

https://gitlab.com/gnutls/gnutls/merge_requests/657
https://gitlab.com/gnutls/gnutls/commit/ce671a6db9e47006cff152d485091141b1569f39 (master)
The proposed fix is to introduce a new option to force encrypt-then-mac
instead of correcting the issue.
https://eprint.iacr.org/2018/747
Backport of the MR657 to 3.5.x: https://gitlab.com/gnutls/gnutls/merge_requests/663

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