Debian LTS: Security Advisory for golang-go.crypto (DLA-2402-1)

Published: 2020-10-08 03:00:22
CVE Author: NIST National Vulnerability Database

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

Summary:
The remote host is missing an update for the 'golang-go.crypto' Linux Distribution Package(s) announced via the DLA-2402-1 advisory.

Detection Method:
Checks if a vulnerable Linux Distribution Package version is present on the target host.

Technical Details:
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 Linux Distribution Package. A client can attack an SSH server that accepts public keys. Also, a server can attack any SSH client.

Affected Versions:
'golang-go.crypto' Linux Distribution Package(s) on Debian Linux.

Recommendations:
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 Linux Distribution Packages.

Solution Type:
Vendor Patch

Detection Type:
Linux Distribution Package

NIST (National Institute of Standards and Technology) NVD (National Vulnerability Database)

https://nvd.nist.gov/vuln/detail/CVE-2019-11840
https://nvd.nist.gov/vuln/detail/CVE-2019-11841
https://nvd.nist.gov/vuln/detail/CVE-2020-9283

References:

https://lists.debian.org/debian-lts-announce/2020/10/msg00014.html
https://security-tracker.debian.org/tracker/DLA-2402-1

Severity
Medium
CVSS Score
5.0
Published
2020-10-08
Modified
2020-10-08
Category
Debian Local Security Checks

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