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Test ID:1.3.6.1.4.1.25623.1.0.892402
Category:Debian Local Security Checks
Title:Debian LTS: Security Advisory for golang-go.crypto (DLA-2402-1)
Summary:The remote host is missing an update for the 'golang-go.crypto'; package(s) announced via the DLA-2402-1 advisory.
Description:Summary:
The remote host is missing an update for the 'golang-go.crypto'
package(s) announced via the DLA-2402-1 advisory.

Vulnerability Insight:
CVE-2019-11840

An issue was discovered in supplementary Go cryptography libraries, aka
golang-googlecode-go-crypto. If more than 256 GiB of keystream is
generated, or if the counter otherwise grows greater than 32 bits, the amd64
implementation will first generate incorrect output, and then cycle back to
previously generated keystream. Repeated keystream bytes can lead to loss of
confidentiality in encryption applications, or to predictability in CSPRNG
applications.

CVE-2019-11841

A message-forgery issue was discovered in
crypto/openpgp/clearsign/clearsign.go in supplementary Go cryptography
libraries. The 'Hash' Armor Header specifies the message digest
algorithm(s) used for the signature. Since the library skips Armor Header
parsing in general, an attacker can not only embed arbitrary Armor Headers,
but also prepend arbitrary text to cleartext messages without invalidating
the signatures.

CVE-2020-9283

golang.org/x/crypto allows a panic during signature verification in the
golang.org/x/crypto/ssh package. A client can attack an SSH server that accepts
public keys. Also, a server can attack any SSH client.

Affected Software/OS:
'golang-go.crypto' package(s) on Debian Linux.

Solution:
For Debian 9 stretch, these problems have been fixed in version
1:0.0~
git20170407.0.55a552f+REALLY.0.0~
git20161012.0.5f31782-1+deb8u1.

We recommend that you upgrade your golang-go.crypto packages.

CVSS Score:
5.0

CVSS Vector:
AV:N/AC:L/Au:N/C:N/I:N/A:P

Cross-Ref: Common Vulnerability Exposure (CVE) ID: CVE-2020-9283
http://packetstormsecurity.com/files/156480/Go-SSH-0.0.2-Denial-Of-Service.html
https://lists.debian.org/debian-lts-announce/2020/10/msg00014.html
https://lists.debian.org/debian-lts-announce/2020/11/msg00027.html
CopyrightCopyright (C) 2020 Greenbone Networks GmbH

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