7.1

CVE-2021-21401

Exploit

Invalid free() call in Nanopb

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.
Daten sind bereitgestellt durch National Vulnerability Database (NVD)
Nanopb Project ≫ Nanopb Version < 0.3.9.8
Nanopb Project ≫ Nanopb Version >= 0.4.0 < 0.4.5
Zu dieser CVE wurde keine Warnung gefunden.
EPSS Metriken
Typ Quelle Score Percentile
EPSS FIRST.org 1.81% 0.758
CVSS Metriken
Quelle Base Score Exploit Score Impact Score Vector String
nvd@nist.gov 7.1 2.8 4.2
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:L
nvd@nist.gov 5.5 8 4.9
AV:N/AC:L/Au:S/C:N/I:P/A:P
security-advisories@github.com 7.1 2.8 4.2
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:L
CWE-763 Release of Invalid Pointer or Reference

The product attempts to return a memory resource to the system, but it calls the wrong release function or calls the appropriate release function incorrectly.

https://github.com/nanopb/nanopb/blob/c9124132a604047d0ef97a09c0e99cd9bed2c818/CHANGELOG.txt#L1
Third Party Advisory
Release Notes
https://github.com/nanopb/nanopb/commit/e2f0ccf939d9f82931d085acb6df8e9a182a4261
Patch
Third Party Advisory
https://github.com/nanopb/nanopb/issues/647
Third Party Advisory
Exploit
Issue Tracking
https://github.com/nanopb/nanopb/security/advisories/GHSA-7mv5-5mxh-qg88
Patch
Third Party Advisory
Exploit