Debian DLA-2402-1 : golang-go.crypto security update

medium Nessus Plugin ID 141271
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Synopsis

The remote Debian host is missing a security update.

Description

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.

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.

For the detailed security status of golang-go.crypto please refer to its security tracker page at:
https://security-tracker.debian.org/tracker/golang-go.crypto

NOTE: Tenable Network Security has extracted the preceding description block directly from the DLA security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

Solution

Upgrade the affected packages.

See Also

https://lists.debian.org/debian-lts-announce/2020/10/msg00014.html

https://packages.debian.org/source/stretch/golang-go.crypto

http://www.nessus.org/u?e94138e5

Plugin Details

Severity: Medium

ID: 141271

File Name: debian_DLA-2402.nasl

Version: 1.2

Type: local

Agent: unix

Published: 10/8/2020

Updated: 10/12/2020

Dependencies: ssh_get_info.nasl

Risk Information

CVSS Score Source: CVE-2019-11841

VPR

Risk Factor: Medium

Score: 6.1

CVSS v2

Risk Factor: Medium

Base Score: 4.3

Temporal Score: 3.4

Vector: AV:N/AC:M/Au:N/C:N/I:P/A:N

Temporal Vector: E:POC/RL:OF/RC:C

CVSS v3

Risk Factor: Medium

Base Score: 5.9

Temporal Score: 5.3

Vector: CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N

Temporal Vector: E:P/RL:O/RC:C

Vulnerability Information

CPE: p-cpe:/a:debian:debian_linux:golang-go.crypto-dev, p-cpe:/a:debian:debian_linux:golang-golang-x-crypto-dev, cpe:/o:debian:debian_linux:9.0

Required KB Items: Host/local_checks_enabled, Host/Debian/release, Host/Debian/dpkg-l

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 10/7/2020

Vulnerability Publication Date: 5/9/2019

Reference Information

CVE: CVE-2019-11840, CVE-2019-11841, CVE-2020-9283