CVE-2021-21401

Katalog CVE

CVSS 7.1 · High EPSS 1,8%

Kerentanan Release of Invalid Pointer or Reference pada nanopb project nanopb. Skor CVSS 3.1 7.1 (High) menurut NVD.

Deskripsi (NVD)

Nanopb is a small code-size Protocol Buffers implementation in ansi C. In Nanopb before versions 0.3.9.8 and 0.4.5, decoding a specifically formed message can cause invalid `free()` or `realloc()` calls if the message type contains an `oneof` field, and the `oneof` directly contains both a pointer field and a non-pointer field. If the message data first contains the non-pointer field and then the pointer field, the data of the non-pointer field is incorrectly treated as if it was a pointer value. Such message data rarely occurs in normal messages, but it is a concern when untrusted data is parsed. This has been fixed in versions 0.3.9.8 and 0.4.5. See referenced GitHub Security Advisory for more information including workarounds.

Rincian

Terbit di NVD

23 Maret 2021

Terakhir diubah

17 Juni 2026

Status NVD

Modified

CVSS 3.1

7.1 (High), sumber NVD
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:L · uraikan di kalkulator

Jenis kelemahan (CWE)

CWE-763: Release of Invalid Pointer or Reference

EPSS (30 hari)

1,8% peluang dieksploitasi; lebih tinggi dari 78,0% CVE lain

Produk dan versi terdampak

> Data dari konfigurasi CPE di NVD.

Referensi dan perbaikan

• https://github.com/nanopb/nanopb/commit/e2f0ccf939d9f82931d085acb6df8e9a182a4261 patch · advisory pihak ketiga
• https://github.com/nanopb/nanopb/security/advisories/GHSA-7mv5-5mxh-qg88 exploit · patch · advisory pihak ketiga
• https://github.com/nanopb/nanopb/blob/c9124132a604047d0ef97a09c0e99cd9bed2c818/CHANGELOG.txt#L1 release notes · advisory pihak ketiga
• https://github.com/nanopb/nanopb/issues/647 exploit · issue tracking · advisory pihak ketiga