Vulnerability · Published Aug 12, 2021 · Assigned by mitre
CVE-2021-38604
High 7.5
In plain English
A high-severity null pointer dereference in the glibc package (Ubuntu). There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 3.7% (higher than 90% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Severity (CVSS 3.1)7.5High
Exploit odds (30 days)3.7%top 10.2% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official description
In librt in the GNU C Library (aka glibc) through 2.34, sysdeps/unix/sysv/linux/mq_notify.c mishandles certain NOTIFY_REMOVED data, leading to a NULL pointer dereference. NOTE: this vulnerability was introduced as a side effect of the CVE-2021-33574 fix.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu:22.04:LTS | glibc | 2.34-0ubuntu3 | UBUNTU-CVE-2021-38604 |
Affected products (as reported)
Weakness: CWE-476 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
References
- https://sourceware.org/git/?p=glibc.git%3Ba=commit%3Bh=b805aebd42364fe696e417808a700fdb9800c9e8 x_refsource_MISC
- https://sourceware.org/git/?p=glibc.git%3Ba=commit%3Bh=4cc79c217744743077bf7a0ec5e0a4318f1e6641 x_refsource_MISC
- https://sourceware.org/bugzilla/show_bug.cgi?id=28213 x_refsource_MISC
- FEDORA-2021-16dc1f33af vendor-advisory, x_refsource_FEDORA
- https://www.oracle.com/security-alerts/cpujul2022.html x_refsource_MISC
- https://blog.tuxcare.com/cve/tuxcare-team-identifies-cve-2021-38604-a-new-vulnerability-in-glibc x_refsource_MISC
- https://security.netapp.com/advisory/ntap-20210909-0005/ x_refsource_CONFIRM
- GLSA-202208-24 vendor-advisory, x_refsource_GENTOO
- https://cert-portal.siemens.com/productcert/html/ssa-831302.html
- https://cert-portal.siemens.com/productcert/html/ssa-398330.html