CVE-2019-11840

medium
New! CVE Severity Now Using CVSS v3

The calculated severity for CVEs has been updated to use CVSS v3 by default. CVEs that do not have a CVSS v3 score will fall back CVSS v2 for calculating severity. Severity display preferences can be toggled in the settings dropdown.

Description

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.

References

https://bugzilla.redhat.com/show_bug.cgi?id=1691529

https://github.com/golang/go/issues/30965

https://go.googlesource.com/crypto/+/b7391e95e576cacdcdd422573063bc057239113d

https://groups.google.com/forum/#!msg/golang-announce/tjyNcJxb2vQ/n0NRBziSCAAJ

https://lists.debian.org/debian-lts-announce/2019/06/msg00029.html

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

https://lists.debian.org/debian-lts-announce/2020/11/msg00016.html

https://lists.debian.org/debian-lts-announce/2020/11/msg00030.html

https://lists.debian.org/debian-lts-announce/2021/01/msg00015.html

Details

Source: MITRE

Published: 2019-05-09

Updated: 2021-01-18

Type: CWE-330

Risk Information

CVSS v2

Base Score: 4.3

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

Impact Score: 2.9

Exploitability Score: 8.6

Severity: MEDIUM

CVSS v3

Base Score: 5.9

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

Impact Score: 3.6

Exploitability Score: 2.2

Severity: MEDIUM

Vulnerable Software

Configuration 1

OR

cpe:2.3:a:golang:crypto:*:*:*:*:*:*:*:*

Tenable Plugins

View all (6 total)

IDNameProductFamilySeverity
145229RHEL 7 : OpenShift Container Platform 3.11.374 bug fix and (RHSA-2021:0079)NessusRed Hat Local Security Checks
medium
145165Debian DLA-2527-1 : snapd security updateNessusDebian Local Security Checks
medium
143099Debian DLA-2454-1 : rclone security updateNessusDebian Local Security Checks
medium
142667Debian DLA-2442-1 : obfs4proxy security updateNessusDebian Local Security Checks
medium
141271Debian DLA-2402-1 : golang-go.crypto security updateNessusDebian Local Security Checks
medium
126349Debian DLA-1840-1 : golang-go.crypto security updateNessusDebian Local Security Checks
medium