CVE-2020-25660

NameCVE-2020-25660
DescriptionA flaw was found in the Cephx authentication protocol in versions before 15.2.6 and before 14.2.14, where it does not verify Ceph clients correctly and is then vulnerable to replay attacks in Nautilus. This flaw allows an attacker with access to the Ceph cluster network to authenticate with the Ceph service via a packet sniffer and perform actions allowed by the Ceph service. This issue is a reintroduction of CVE-2018-1128, affecting the msgr2 protocol. The msgr 2 protocol is used for all communication except older clients that do not support the msgr2 protocol. The msgr1 protocol is not affected. The highest threat from this vulnerability is to confidentiality, integrity, and system availability.
SourceCVE (at NVD; CERT, LWN, oss-sec, fulldisc, bugtraq, EDB, Metasploit, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, Mageia, GitHub code/issues, web search, more)
Debian Bugs975275

Vulnerable and fixed packages

The table below lists information on source packages.

Source PackageReleaseVersionStatus
ceph (PTS)stretch (security), stretch10.2.11-2fixed
buster12.2.11+dfsg1-2.1fixed
bullseye, sid14.2.9-1vulnerable

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

PackageTypeReleaseFixed VersionUrgencyOriginDebian Bugs
cephsourcestretch(not affected)
cephsourcebuster(not affected)
cephsource(unstable)(unfixed)975275

Notes

[buster] - ceph <not-affected> (Vulnerable code introduced later)
[stretch] - ceph <not-affected> (Vulnerable code introduced later)
https://www.openwall.com/lists/oss-security/2020/11/17/4
Proposed patches: https://www.openwall.com/lists/oss-security/2020/11/17/3
Introduced by: https://github.com/ceph/ceph/commit/321548010578d6ff7bbf2e5ce8a550008b131423 (v15.1.0, backported to v14.2.5)
Fixed by: https://github.com/ceph/ceph/commit/6c14c2fb5650426285428dfe6ca1597e5ea1d07d (15.2.6)
Fixed by: https://github.com/ceph/ceph/commit/1316c82aae8c51b3fe10d8a8f0a87b60db54ee16 (15.2.6)
Fixed by: https://github.com/ceph/ceph/commit/bafdfec8f974f1a3f7d404bcfd0a4cfad784937d (15.2.6)
Fixed by: https://github.com/ceph/ceph/commit/2927fd91d41e505237cc73f9700e5c6a63e5cb4f (14.2.14)
Fixed by: https://github.com/ceph/ceph/commit/4c11203122d729c832a645c9e3f5092db4963840 (14.2.14)
Fixed by: https://github.com/ceph/ceph/commit/bb5d3d58bfcae96d2e5f796eaa74fc0987f79e77 (14.2.14)

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