CVE-2020-1752: A use-after-free vulnerability introduced in glibc upstream version 2.14 was found in the way the tilde expansion was carried out.

Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

• canonical ubuntu linux16.04
• canonical ubuntu linux18.04
• canonical ubuntu linux19.10
• debian debian linux10.0
• gnu glibcbefore 2.32.0
• netapp active iq unified manager9.5 and later
• netapp h410c firmwareall versions
• netapp hci management nodeall versions
• netapp solidfireall versions
• netapp steelstore cloud integrated storageall versions

Versions reported by the vendor

Affected version ranges reported by the assigning authority (redhat). Independent of NVD's CPE analysis and usually ahead of it.

• GNU Libc glibc

  • Affected: versions 2.14 and later, Fixed: version 2.32affected

Package-level exposure

OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.

Other highest-scoring records for the same primary product.

• CVE-2023-4911Glibc: buffer overflow in ld.so leading to privilege escalationKEV
  80Now
• CVE-2015-0235Heap-based buffer overflow in the __nss_hostname_digits_dots function in glibc 2.2, and other 2.x versions before 2.18, allows context-depen
  68This week
• CVE-2015-7547Multiple stack-based buffer overflows in the (1) send_dg and (2) send_vc functions in the libresolv library in the GNU C Library (aka glibc
  60This week

Published before and after this one in the same product

• ← EarlierCVE-2020-6096Apr 1, 2020 · An exploitable signed comparison vulnerability exists in the ARMv7 memcpy() implementation of GNU glibc 2.30.9000.
  34Monitor
• ← EarlierCVE-2020-1751Apr 17, 2020 · An out-of-bounds write vulnerability was found in glibc before 2.31 when handling signal trampolines on PowerPC.
  28Monitor
• Later →CVE-1999-0199Oct 6, 2020 · manual/search.texi in the GNU C Library (aka glibc) before 2.2 lacks a statement about the unspecified tdelete return value upon deletion of
  40Plan

FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).

Root cause

After a memory region is freed, another reference pointing to it is still used. By then, the same region may have been allocated for different data.

A representative example of this vulnerability class. Not the vendor's source code; it shows the faulty pattern and its fix.

1free(dev->buf);2/* ... another thread is still running ... */3process(dev->buf);

1lock(&dev->lock);2free(dev->buf);3dev->buf = NULL;4unlock(&dev->lock);

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

MITRE has no CAPEC/ATT&CK mapping for this CWE.