Arch Linux Security Advisory ASA-202011-22

Severity: High
Date    : 2020-11-26
CVE-ID  : CVE-2020-1759 CVE-2020-1760 CVE-2020-10753 CVE-2020-25660
Package : ceph
Type    : multiple issues
Remote  : Yes
Link    :


The package ceph before version 15.2.6-1 is vulnerable to multiple
issues including authentication bypass, content spoofing, cross-site
scripting and private key recovery.


Upgrade to 15.2.6-1.

# pacman -Syu "ceph>=15.2.6-1"

The problems have been fixed upstream in version 15.2.6.




- CVE-2020-1759 (private key recovery)

A vulnerability was found in Red Hat Ceph Storage 4 and Red Hat
Openshift Container Storage 4.2, where a nonce reuse vulnerability was
discovered in the secure mode of the messenger v2 protocol, which can
allow an attacker to forge auth tags and potentially manipulate the
data by leveraging the reuse of a nonce in a session. Messages
encrypted using a reused nonce value are susceptible to serious
confidentiality and integrity attacks.

- CVE-2020-1760 (cross-site scripting)

A flaw was found in the Ceph Object Gateway, where it supports request
sent by an anonymous user in Amazon S3. This flaw could lead to
potential XSS attacks due to the lack of proper neutralization of
untrusted input. If the attacker knows the path to a publicly readable
object on any RGW cluster and the object is at least large enough to
cover the attack body then it is possible to run an XSS on any object.

- CVE-2020-10753 (content spoofing)

A flaw was found in the Ceph Storage RadosGW (Ceph Object Gateway). The
vulnerability is related to the injection of HTTP headers via a CORS
ExposeHeader tag. The newline character in the ExposeHeader tag in the
CORS configuration file generates a header injection in the response
when the CORS request is made. This issue affects the RadosGW S3 API,
it does not affect the Swift API.

- CVE-2020-25660 (authentication bypass)

A 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 msgr2 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


An attacker might be able to decrypt and force Ceph messages, bypass
CORS and exploit XSS to trick a user into performing an unwanted