CVE-2023-4806: Glibc: potential use-after-free in getaddrinfo()

Affected versions

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

• fedoraproject fedora37
• fedoraproject fedora38
• fedoraproject fedora39
• gnu glibc2.33
• redhat codeready linux builder eus9.2
• redhat codeready linux builder eus for power little endian9.0_ppc64le
• redhat codeready linux builder eus for power little endian eus9.2_ppc64le
• redhat codeready linux builder for arm649.0_aarch64
• redhat codeready linux builder for arm64 eus9.2_aarch64
• redhat codeready linux builder for ibm z systems9.0_s390x
• redhat codeready linux builder for ibm z systems eus9.2_s390x
• redhat enterprise linux7.0
• redhat enterprise linux8.0
• redhat enterprise linux9.0
• redhat enterprise linux eus8.8
• redhat enterprise linux eus9.2
• redhat enterprise linux for arm 649.0_aarch64
• redhat enterprise linux for arm 64 eus9.2_aarch64
• redhat enterprise linux for ibm z systems8.0_s390x
• redhat enterprise linux for ibm z systems eus8.8_s390x

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.

• Red Hat Red Hat Enterprise Linux 6

  • all versionsunknown
  • all versionsunknown

• Red Hat Red Hat Enterprise Linux 7

  • all versionsaffected
  • all versionsaffected

• Red Hat Red Hat Enterprise Linux 8

  • 0:2.28-225.el8_8.6 and laternot affected · rpm
  • 0:2.28-225.el8_8.6 and laternot affected · rpm

• Red Hat Red Hat Enterprise Linux 8.6 Extended Update Support

  • 0:2.28-189.8.el8_6 and laternot affected · rpm

• Red Hat Red Hat Enterprise Linux 9

  • 0:2.34-60.el9_2.7 and laternot affected · rpm
  • 0:2.34-60.el9_2.7 and laternot affected · rpm

• Red Hat Red Hat Virtualization 4 for Red Hat Enterprise Linux 8

  • 0:2.28-189.8.el8_6 and laternot affected · rpm

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-2023-4813Sep 12, 2023 · Glibc: potential use-after-free in gaih_inet()
  24Monitor
• ← EarlierCVE-2023-4527Sep 18, 2023 · Glibc: stack read overflow in getaddrinfo in no-aaaa mode
  27Monitor
• Later →CVE-2023-5156Sep 25, 2023 · Glibc: dos due to memory leak in getaddrinfo.c
  30Monitor

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.