Vulnerability in Apple Ipados
CVE-2019-20044
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().
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.8 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.005 (42.5th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 42nd percentile — 42.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.005 · newest: 0.005 · change: 0.000
Affected products
- Apple Ipados
- Apple Iphone OS
- Apple macOS
- Apple Mac OS X — versions 10.13.6, 10.14.6
- Apple tvOS
- Apple watchOS
- Linux Kernel
- Zsh
- Debian Linux — versions 8.0, 9.0
- Fedoraproject Fedora — versions 30, 31
Weakness classification (CWE)
Public proof-of-concept exploits
References
- zsh.sourceforge.net/releases.html (Third Party Advisory, Release Notes)
- github.com/XMB5/zsh-privileged-upgrade (Broken Link)
- www.zsh.org/mla/zsh-announce/141 (Release Notes, Vendor Advisory)
- lists.debian.org/debian-lts-announce/2020/03/msg00004.html (mailing-list, Mailing List, Third Party Advisory)
- lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/… (vendor-advisory)
- lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/… (vendor-advisory)
- security.gentoo.org/glsa/202003-55 (vendor-advisory, Third Party Advisory)
- support.apple.com/kb/HT211170 (Third Party Advisory)
- support.apple.com/kb/HT211175 (Third Party Advisory)
- support.apple.com/kb/HT211171 (Third Party Advisory)
Frequently asked questions
- What is CVE-2019-20044?
- CVE-2019-20044 is a high-severity vulnerability in Apple Ipados, classified under Improper Check for Dropped Privileges. CVSS score: 7.8/10. Published 2020-02-24.
- How severe is CVE-2019-20044?
- High severity. CVSS v3 base score is 7.8 out of 10.
- Is CVE-2019-20044 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.