PT-2020-9615 · Unknown+1 · Newlib Libc+1

Dimitrios Glynos · Published 2020-03-19 · Updated 2020-03-24 · CVE-2019-14876

Positive Technologies (AI Summary)

CVSS v3.1

6.5

Medium

Base vector

AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Name of the Vulnerable Software and Affected Versions newlib libc library versions prior to 3.3.0

Description The issue arises in the lshift function of the newlib libc library, where memory allocation using Balloc for a big integer does not include a check for allocation success. This oversight can lead to a null pointer dereference bug if memory allocation fails, as access to b1 will be attempted without verifying if the allocation was successful.

Recommendations For versions prior to 3.3.0, update to version 3.3.0 or later to resolve the issue.

Exploit

Fix

NULL Pointer Dereference

Weakness Enumeration

CWE-476

Related Identifiers

CVE-2019-14876

Affected Products

Debian

Newlib Libc

References · 8

• 🔥 https://census-labs.com/news/2020/01/31/multiple-null-pointer-dereference-vulnerabilities-in-newlib · Exploit
• https://osv.dev/vulnerability/DEBIAN-CVE-2019-14876 · Vendor Advisory
• https://security-tracker.debian.org/tracker/CVE-2019-14876 · Vendor Advisory
• https://cve.org/CVERecord?id=CVE-2019-14876 · Security Note
• https://osv.dev/vulnerability/CVE-2019-14876 · Vendor Advisory
• https://osv.dev/vulnerability/UBUNTU-CVE-2019-14876 · Vendor Advisory
• https://ubuntu.com/security/CVE-2019-14876 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2019-14876 · Security Note