5.1 Medium
CVSS2
Attack Vector
NETWORK
Attack Complexity
HIGH
Authentication
NONE
Confidentiality Impact
PARTIAL
Integrity Impact
PARTIAL
Availability Impact
PARTIAL
AV:N/AC:H/Au:N/C:P/I:P/A:P
7.8 High
CVSS3
Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
7.9 High
AI Score
Confidence
High
0.001 Low
EPSS
Percentile
38.5%
Issue Overview:
A vulnerability was found in zsh in the parsecolorchar() function of prompt.c file. This flaw allows an attacker to perform code execution if they control a command output inside the prompt, as stated by a %F%K argument. This occurs because of recursive PROMPT_SUBST expansion. (CVE-2021-45444)
Affected Packages:
zsh
Note:
This advisory is applicable to Amazon Linux 2 (AL2) Core repository. Visit this FAQ section for the difference between AL2 Core and AL2 Extras advisories.
Issue Correction:
Run yum update zsh to update your system.
New Packages:
aarch64:
zsh-5.8.1-1.amzn2.0.1.aarch64
zsh-debuginfo-5.8.1-1.amzn2.0.1.aarch64
i686:
zsh-5.8.1-1.amzn2.0.1.i686
zsh-debuginfo-5.8.1-1.amzn2.0.1.i686
noarch:
zsh-html-5.8.1-1.amzn2.0.1.noarch
src:
zsh-5.8.1-1.amzn2.0.1.src
x86_64:
zsh-5.8.1-1.amzn2.0.1.x86_64
zsh-debuginfo-5.8.1-1.amzn2.0.1.x86_64
Red Hat: CVE-2021-45444
Mitre: CVE-2021-45444
OS | Version | Architecture | Package | Version | Filename |
---|---|---|---|---|---|
Amazon Linux | 2 | aarch64 | zsh | < 5.8.1-1.amzn2.0.1 | zsh-5.8.1-1.amzn2.0.1.aarch64.rpm |
Amazon Linux | 2 | aarch64 | zsh-debuginfo | < 5.8.1-1.amzn2.0.1 | zsh-debuginfo-5.8.1-1.amzn2.0.1.aarch64.rpm |
Amazon Linux | 2 | i686 | zsh | < 5.8.1-1.amzn2.0.1 | zsh-5.8.1-1.amzn2.0.1.i686.rpm |
Amazon Linux | 2 | i686 | zsh-debuginfo | < 5.8.1-1.amzn2.0.1 | zsh-debuginfo-5.8.1-1.amzn2.0.1.i686.rpm |
Amazon Linux | 2 | noarch | zsh-html | < 5.8.1-1.amzn2.0.1 | zsh-html-5.8.1-1.amzn2.0.1.noarch.rpm |
Amazon Linux | 2 | x86_64 | zsh | < 5.8.1-1.amzn2.0.1 | zsh-5.8.1-1.amzn2.0.1.x86_64.rpm |
Amazon Linux | 2 | x86_64 | zsh-debuginfo | < 5.8.1-1.amzn2.0.1 | zsh-debuginfo-5.8.1-1.amzn2.0.1.x86_64.rpm |
5.1 Medium
CVSS2
Attack Vector
NETWORK
Attack Complexity
HIGH
Authentication
NONE
Confidentiality Impact
PARTIAL
Integrity Impact
PARTIAL
Availability Impact
PARTIAL
AV:N/AC:H/Au:N/C:P/I:P/A:P
7.8 High
CVSS3
Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
7.9 High
AI Score
Confidence
High
0.001 Low
EPSS
Percentile
38.5%