Podatność CVE-2021-21401


Publikacja: 2021-03-23

Opis:
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.

Typ:

CWE-763

CVSS2 => (AV:N/AC:L/Au:S/C:N/I:P/A:P)

Ogólna skala CVSS
Znaczenie
Łatwość wykorzystania
5.5/10
4.9/10
8/10
Wymagany dostęp
Złożoność ataku
Autoryzacja
Zdalny
Niska
Jednorazowa
Wpływ na poufność
Wpływ na integralność
Wpływ na dostępność
Brak
Częściowy
Częściowy
Affected software
Nanopb project -> Nanopb 

 Referencje:
https://github.com/nanopb/nanopb/blob/c9124132a604047d0ef97a09c0e99cd9bed2c818/CHANGELOG.txt#L1
https://github.com/nanopb/nanopb/commit/e2f0ccf939d9f82931d085acb6df8e9a182a4261
https://github.com/nanopb/nanopb/issues/647
https://github.com/nanopb/nanopb/security/advisories/GHSA-7mv5-5mxh-qg88

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