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update: shadow #1085

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vbatts opened this issue Jun 19, 2023 · 0 comments · Fixed by flatcar/scripts#1037
Closed

update: shadow #1085

vbatts opened this issue Jun 19, 2023 · 0 comments · Fixed by flatcar/scripts#1037
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advisory security advisory cvss/LOW < 4 assessed CVSS security security concerns

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vbatts commented Jun 19, 2023 •
edited by dongsupark
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Name: shadow
CVEs: CVE-2023-29383
CVSSs: 3.3
Action Needed: update to >= sys-apps/shadow-4.13-r4

Summary:

  • CVE-2023-29383: In Shadow 4.13, it is possible to inject control characters into fields provided to the SUID program chfn (change finger). Although it is not possible to exploit this directly (e.g., adding a new user fails because \n is in the block list), it is possible to misrepresent the /etc/passwd file when viewed. Use of \r manipulations and Unicode characters to work around blocking of the : character make it possible to give the impression that a new user has been added. In other words, an adversary may be able to convince a system administrator to take the system offline (an indirect, social-engineered denial of service) by demonstrating that "cat /etc/passwd" shows a rogue user account.
  • possible password leak during passwd(1) change

refmap.gentoo:
@vbatts vbatts added advisory security advisory security security concerns labels Jun 19, 2023
@dongsupark dongsupark moved this from 📝 Needs Triage to 🪵Backlog in Flatcar tactical, release planning, and roadmap Jun 19, 2023
@dongsupark dongsupark added the cvss/LOW < 4 assessed CVSS label Jun 19, 2023
@krnowak krnowak mentioned this issue Aug 1, 2023
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@github-actions github-actions bot mentioned this issue Nov 10, 2023
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dev-libs/openssl, sys-apps/shadow: Security updates flatcar/scripts
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