Vulnerability · Published Feb 9, 2021 · Assigned by Chrome
CVE-2021-21123
Medium 6.5
In plain English
A medium-severity security flaw in Chrome from Google. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 10.9% (higher than 96% of all known vulnerabilities). Ready-made attack tooling exists: public proof-of-concept code. Fixed versions are available - upgrade the affected package.
Severity (CVSS NVD)6.5Medium
Exploit odds (30 days)10.9%top 4.1% of all CVEs
Exploited in the wildNo reportsnot in CISA KEV
Attack tooling1Public PoC
Official description
Insufficient data validation in File System API in Google Chrome prior to 88.0.4324.96 allowed a remote attacker to bypass filesystem restrictions via a crafted HTML page.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine:v3.20 | qt5-qtwebengine | 5.15.3_git20200401-r0 | ALPINE-CVE-2021-21123 |
| Alpine:v3.21 | qt5-qtwebengine | 5.15.3_git20200401-r0 | ALPINE-CVE-2021-21123 |
| Alpine:v3.22 | qt5-qtwebengine | 5.15.3_git20200401-r0 | ALPINE-CVE-2021-21123 |
| Alpine:v3.23 | qt5-qtwebengine | 5.15.3_git20200401-r0 | ALPINE-CVE-2021-21123 |
| Debian:12 | chromium | 88.0.4324.96-0.1 | DEBIAN-CVE-2021-21123 |
| Debian:13 | chromium | 88.0.4324.96-0.1 | DEBIAN-CVE-2021-21123 |
| Debian:14 | chromium | 88.0.4324.96-0.1 | DEBIAN-CVE-2021-21123 |
Affected products (as reported)
References
- https://chromereleases.googleblog.com/2021/01/stable-channel-update-for-desktop_19.html x_refsource_MISC
- https://crbug.com/1137247 x_refsource_MISC
- https://msrc.microsoft.com/update-guide/en-US/vulnerability/CVE-2021-21123 x_refsource_MISC