AmazonALAS-2019-1285Medium: zsh
9.8 High
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
7.5 High
CVSS2
Access Vector
NETWORK
Access Complexity
LOW
Authentication
NONE
Confidentiality Impact
PARTIAL
Integrity Impact
PARTIAL
Availability Impact
PARTIAL
AV:N/AC:L/Au:N/C:P/I:P/A:P
0.01 Low
EPSS
Percentile
83.4%
Issue Overview:
It was discovered that zsh does not properly validate the shebang of input files and it truncates it to the first 64 bytes. A local attacker may use this flaw to make zsh execute a different binary than what is expected, named with a substring of the shebang one.(CVE-2018-13259)
Affected Packages:
zsh
Issue Correction:
Run yum update zsh to update your system.
New Packages:
i686:
zsh-html-5.0.2-33.18.amzn1.i686
zsh-5.0.2-33.18.amzn1.i686
zsh-debuginfo-5.0.2-33.18.amzn1.i686
src:
zsh-5.0.2-33.18.amzn1.src
x86_64:
zsh-html-5.0.2-33.18.amzn1.x86_64
zsh-5.0.2-33.18.amzn1.x86_64
zsh-debuginfo-5.0.2-33.18.amzn1.x86_64
Additional References
Red Hat: CVE-2018-13259
Mitre: CVE-2018-13259
| OS | Version | Architecture | Package | Version | Filename |
|---|---|---|---|---|---|
| Amazon Linux | 1 | i686 | zsh-html | < 5.0.2-33.18.amzn1 | zsh-html-5.0.2-33.18.amzn1.i686.rpm |
| Amazon Linux | 1 | i686 | zsh | < 5.0.2-33.18.amzn1 | zsh-5.0.2-33.18.amzn1.i686.rpm |
| Amazon Linux | 1 | i686 | zsh-debuginfo | < 5.0.2-33.18.amzn1 | zsh-debuginfo-5.0.2-33.18.amzn1.i686.rpm |
| Amazon Linux | 1 | x86_64 | zsh-html | < 5.0.2-33.18.amzn1 | zsh-html-5.0.2-33.18.amzn1.x86_64.rpm |
| Amazon Linux | 1 | x86_64 | zsh | < 5.0.2-33.18.amzn1 | zsh-5.0.2-33.18.amzn1.x86_64.rpm |
| Amazon Linux | 1 | x86_64 | zsh-debuginfo | < 5.0.2-33.18.amzn1 | zsh-debuginfo-5.0.2-33.18.amzn1.x86_64.rpm |
Related
9.8 High
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
7.5 High
CVSS2
Access Vector
NETWORK
Access Complexity
LOW
Authentication
NONE
Confidentiality Impact
PARTIAL
Integrity Impact
PARTIAL
Availability Impact
PARTIAL
AV:N/AC:L/Au:N/C:P/I:P/A:P
0.01 Low
EPSS
Percentile
83.4%