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CVE-2019-20044

HIGH

7.8

CVSS Score

Published: February 24, 2020 at 01:09 PM UTC

Updated: June 17, 2026 at 02:29 AM UTC

8 products affected across 4 vendorsmacOSDebian LinuxFedora· also runs on 1 platform

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Severity

HIGH7.8

Exploit prediction

EPSS 0.5%

Description

In Zsh before 5.8, attackers able to execute commands can regain privileges dropped by the --no-PRIVILEGED option. Zsh fails to overwrite the saved uid, so the original privileges can be restored by executing MODULE_PATH=/dir/with/module zmodload with a module that calls setuid().

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

iPadOS · Apple

95%

v < 13.5

Affected range stops below 13.5, so it looks safe — our inference, not a vendor statement

iPhone OS · Apple

95%

v < 13.5

Affected range stops below 13.5, so it looks safe — our inference, not a vendor statement

95%

Affected range stops below 10.13.6, so it looks safe — our inference, not a vendor statement

Affected range stops below 10.14.6, so it looks safe — our inference, not a vendor statement

Affected range stops below 10.15.5, so it looks safe — our inference, not a vendor statement

95%

v < 13.4.5

Affected range stops below 13.4.5, so it looks safe — our inference, not a vendor statement

watchOS · Apple

95%

v < 6.2.5

Affected range stops below 6.2.5, so it looks safe — our inference, not a vendor statement

Debian Linux · Debiandrupal

95%

Fedora · Fedora Projectrpm

95%

95%

v < 5.8

Affected range stops below 5.8, so it looks safe — our inference, not a vendor statement

apple-macos (environment) · linux-linux-kernel (environment)

Runs on — not affected

The affected product only carries this flaw when running on these platforms. The platforms themselves are not vulnerable.

Linux Kernel · Linux

95%

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references

References (20)

Mailing Listx_refsource_FULLDISCThird Party Advisory

Source: [email protected]

http://seclists.org/fulldisclosure/2020/May/49

Mailing Listx_refsource_FULLDISCThird Party Advisory

Source: [email protected]

http://seclists.org/fulldisclosure/2020/May/53

Mailing Listx_refsource_FULLDISCThird Party Advisory

Source: [email protected]

http://seclists.org/fulldisclosure/2020/May/55

Mailing Listx_refsource_FULLDISCThird Party Advisory

Source: [email protected]

http://seclists.org/fulldisclosure/2020/May/59

x_refsource_MISCRelease NotesThird Party Advisory

Source: [email protected]

http://zsh.sourceforge.net/releases.html

x_refsource_MISCBroken Link

Source: [email protected]

https://github.com/XMB5/zsh-privileged-upgrade

Mailing Listx_refsource_MLISTThird Party Advisory

Source: [email protected]

https://lists.debian.org/debian-lts-announce/2020/03/msg00004.html

Mailing Listx_refsource_MLISTThird Party Advisory

Source: [email protected]

https://lists.debian.org/debian-lts-announce/2020/12/msg00000.html

CVSS

7.8HIGH[email protected]

Attack Vector: LOCAL
Complexity: LOW
Privileges: LOW
User Interaction: NONE
Scope: UNCHANGED
Confidentiality: HIGH
Integrity: HIGH
Availability: HIGH

Vector?

Quick Info

StatusMODIFIED

CWE

CWE-273

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