Bug 1626187 (CVE-2018-0502) - CVE-2018-0502 zsh: Improper parsing of the shebang line with special chars
Summary: CVE-2018-0502 zsh: Improper parsing of the shebang line with special chars
Keywords:
Status: CLOSED NOTABUG
Alias: CVE-2018-0502
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Red Hat Product Security
QA Contact:
URL:
Whiteboard:
Depends On: 1626190 1626191
Blocks: 1626189
TreeView+ depends on / blocked
 
Reported: 2018-09-06 17:28 UTC by Pedro Sampaio
Modified: 2021-02-16 23:05 UTC (History)
5 users (show)

Fixed In Version: zsh 5.6
Clone Of:
Environment:
Last Closed: 2018-10-05 09:46:37 UTC
Embargoed:

Attachments (Terms of Use)

Description Pedro Sampaio 2018-09-06 17:28:17 UTC 
An issue was discovered in zsh before 5.6. The beginning of a #! script file was mishandled, potentially leading to an execve call to a program named on the second line.

Upstream patch:

https://sourceforge.net/p/zsh/code/ci/1c4c7b6a4d17294df028322b70c53803a402233d

References:

https://www.zsh.org/mla/zsh-announce/136
Comment 1 Pedro Sampaio 2018-09-06 17:29:52 UTC 
Created zsh tracking bugs for this issue:

Affects: fedora-all [bug 1626190]
Comment 3 Riccardo Schirone 2018-10-05 09:46:37 UTC 
Closing this as NOTABUG and asked to MITRE to reject the CVE. Executing the second line of a script is not a security issue, since in the moment you execute a script you already expect all commands inside it to be executed.
Comment 4 Doran Moppert 2020-02-11 00:31:20 UTC 
Statement:

Red Hat Product Security determined that this flaw was not a security vulnerability. See the Bugzilla link for more details.
Note You need to log in before you can comment on or make changes to this bug.