Vulnerability in GNU Glibc
CVE-2019-19126
On the x86-64 architecture, the GNU C Library (aka glibc) before 2.31 fails to ignore the LD_PREFER_MAP_32BIT_EXEC environment variable during program execution after a security transition, allowing local attackers to restrict the possible mapping addresses for loaded libraries and thus bypass ASLR for a setuid program.
Vulnerability class: Dirty Pipe (CVE-2022-0847)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 3.3 (Low). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N.
EPSS exploit prediction
EPSS: 0.004 (32.6th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 33rd percentile — 32.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.004 · newest: 0.004 · change: 0.000
Affected products
- GNU Glibc
- Canonical Ubuntu Linux — versions 16.04, 18.04, 19.10
- Debian Linux — versions 10.0
- Fedoraproject Fedora — versions 30, 31
Weakness classification (CWE)
Public proof-of-concept exploits
References
- sourceware.org/bugzilla/show_bug.cgi (Patch, Third Party Advisory, Issue Tracking)
- lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/… (vendor-advisory)
- lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/… (vendor-advisory)
- usn.ubuntu.com/4416-1/ (vendor-advisory, Third Party Advisory)
- lists.debian.org/debian-lts-announce/2022/10/msg00021.html (mailing-list, Mailing List, Third Party Advisory)
Frequently asked questions
- What is CVE-2019-19126?
- CVE-2019-19126 is a low-severity vulnerability in GNU Glibc, classified under Improper Initialization. CVSS score: 3.3/10. Published 2019-11-19.
- How severe is CVE-2019-19126?
- Low severity. CVSS v3 base score is 3.3 out of 10.
- Is CVE-2019-19126 known to be exploited?
- 2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.