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Debian DLA-3455-1 : golang-go.crypto - LTS security update

medium Nessus Plugin ID 177400

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Synopsis

The remote Debian host is missing one or more security-related updates.

Description

The remote Debian 10 host has a package installed that is affected by multiple vulnerabilities as referenced in the dla-3455 advisory.

 - An issue was discovered in supplementary Go cryptography libraries, aka golang-googlecode-go-crypto, before 2019-03-20. A flaw was found in the amd64 implementation of golang.org/x/crypto/salsa20 and golang.org/x/crypto/salsa20/salsa. 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-2019-11840)

 - A message-forgery issue was discovered in crypto/openpgp/clearsign/clearsign.go in supplementary Go cryptography libraries 2019-03-25. According to the OpenPGP Message Format specification in RFC 4880 chapter 7, a cleartext signed message can contain one or more optional Hash Armor Headers. The Hash Armor Header specifies the message digest algorithm(s) used for the signature. However, the Go clearsign package ignores the value of this header, which allows an attacker to spoof it. Consequently, an attacker can lead a victim to believe the signature was generated using a different message digest algorithm than what was actually used. Moreover, 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-2019-11841)

 - golang.org/x/crypto before v0.0.0-20200220183623-bac4c82f6975 for Go 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. (CVE-2020-9283)

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

Solution

Upgrade the golang-go.crypto packages.

For Debian 10 buster, these problems have been fixed in version 1

See Also

https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=952462

https://www.debian.org/lts/security/2023/dla-3455

https://security-tracker.debian.org/tracker/CVE-2019-11840

https://security-tracker.debian.org/tracker/CVE-2019-11841

https://security-tracker.debian.org/tracker/CVE-2020-9283

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

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

Plugin Details

Severity: Medium

ID: 177400

File Name: debian_DLA-3455.nasl

Version: 1.3

Type: local

Agent: unix

Published: 6/16/2023

Updated: 12/8/2023

Supported Sensors: Agentless Assessment, Continuous Assessment, Frictionless Assessment Agent, Nessus Agent, Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 4.4

CVSS v2

Risk Factor: Medium

Base Score: 4.3

Temporal Score: 3.4

Vector: CVSS2#AV:N/AC:M/Au:N/C:N/I:P/A:N

CVSS Score Source: CVE-2019-11841

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: CVSS:3.0/E:P/RL:O/RC:C

Vulnerability Information

CPE: cpe:/o:debian:debian_linux:10.0, p-cpe:/a:debian:debian_linux:golang-golang-x-crypto-dev

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: 6/16/2023

Vulnerability Publication Date: 5/9/2019

Reference Information

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

IAVB: 2023-B-0080-S