CVE-2018-13259
zsh: Improper handling of shebang line longer than 64
Severity Score
9.8
*CVSS v3
Exploit Likelihood
*EPSS
Affected Versions
*CPE
Public Exploits
0
*Multiple Sources
Exploited in Wild
-
*KEV
Decision
-
*SSVC
Descriptions
An issue was discovered in zsh before 5.6. Shebang lines exceeding 64 characters were truncated, potentially leading to an execve call to a program name that is a substring of the intended one.
Se ha descubierto un problema en versiones anteriores a la 5.6 de zsh. Las líneas Shebang que exceden los 64 estaban truncadas, lo que podría conducir a una llamada execve a un programa nombrado que es una subcadena del planeado.
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.
*Credits:
N/A
CVSS Scores
Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality
Integrity
Availability
Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality
Integrity
Availability
Attack Vector
Attack Complexity
Authentication
Confidentiality
Integrity
Availability
* Common Vulnerability Scoring System
SSVC
- Decision:-
Exploitation
Automatable
Tech. Impact
* Organization's Worst-case Scenario
Timeline
- 2018-07-05 CVE Reserved
- 2018-09-05 CVE Published
- 2024-06-20 EPSS Updated
- 2024-08-05 CVE Updated
- ---------- Exploited in Wild
- ---------- KEV Due Date
- ---------- First Exploit
CWE
- CWE-20: Improper Input Validation
CAPEC
References (9)
| URL | Tag | Source |
|---|---|---|
| https://lists.debian.org/debian-lts-announce/2020/12/msg00000.html | Mailing List |
|
| URL | Date | SRC |
|---|
| URL | Date | SRC |
|---|---|---|
| https://bugs.debian.org/908000 | 2020-12-01 | |
| https://sourceforge.net/p/zsh/code/ci/1c4c7b6a4d17294df028322b70c53803a402233d | 2020-12-01 |
| URL | Date | SRC |
|---|---|---|
| https://access.redhat.com/errata/RHSA-2019:2017 | 2020-12-01 | |
| https://security.gentoo.org/glsa/201903-02 | 2020-12-01 | |
| https://usn.ubuntu.com/3764-1 | 2020-12-01 | |
| https://www.zsh.org/mla/zsh-announce/136 | 2020-12-01 | |
| https://access.redhat.com/security/cve/CVE-2018-13259 | 2019-08-06 | |
| https://bugzilla.redhat.com/show_bug.cgi?id=1626184 | 2019-08-06 |
Affected Vendors, Products, and Versions
| Vendor | Product | Version | Other | Status | ||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Vendor | Product | Version | Other | Status | <-- --> | Vendor | Product | Version | Other | Status |
| Canonical Search vendor "Canonical" | Ubuntu Linux Search vendor "Canonical" for product "Ubuntu Linux" | 14.04 Search vendor "Canonical" for product "Ubuntu Linux" and version "14.04" | lts |
Affected
| ||||||
| Canonical Search vendor "Canonical" | Ubuntu Linux Search vendor "Canonical" for product "Ubuntu Linux" | 16.04 Search vendor "Canonical" for product "Ubuntu Linux" and version "16.04" | lts |
Affected
| ||||||
| Canonical Search vendor "Canonical" | Ubuntu Linux Search vendor "Canonical" for product "Ubuntu Linux" | 18.04 Search vendor "Canonical" for product "Ubuntu Linux" and version "18.04" | lts |
Affected
| ||||||
| Zsh Search vendor "Zsh" | Zsh Search vendor "Zsh" for product "Zsh" | < 5.6 Search vendor "Zsh" for product "Zsh" and version " < 5.6" | - |
Affected
| ||||||