CVE-2021-21401
HIGH7.1EPSS 0.84%nanopb vulnerable to invalid free() call with oneofs and PB_ENABLE_MALLOC
描述
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.
受影響套件(3)
- Debian/nanopbfrom 0, < 0.4.4-2
- PyPI/nanopb>= 0.3.2, < 0.3.9.8
- PyPI/nanopbfrom 0, < e2f0ccf939d9f82931d085acb6df8e9a182a4261 | from 0, < 0.3.9.8, >= 0.4.0, < 0.4.5
CVSS 分數
| 來源 | 版本 | 嚴重程度 | 向量 |
|---|---|---|---|
| osv | CVSS 4.0 | — | CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:H/VA:L/SC:N/SI:N/SA:N |
| osv | CVSS 3.1 | HIGH7.1 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:L |
參考連結(9)
- ADVISORYhttps://nvd.nist.gov/vuln/detail/CVE-2021-21401
- ADVISORYhttps://security-tracker.debian.org/tracker/CVE-2021-21401
- PATCHhttps://github.com/nanopb/nanopb
- WEBhttps://github.com/nanopb/nanopb/blob/c9124132a604047d0ef97a09c0e99cd9bed2c818/CHANGELOG.txt#L1
- WEBhttps://github.com/nanopb/nanopb/commit/4a375a560651a86726e5283be85a9231fd0efe9c
- WEBhttps://github.com/nanopb/nanopb/commit/e2f0ccf939d9f82931d085acb6df8e9a182a4261
- WEBhttps://github.com/nanopb/nanopb/issues/647
- WEBhttps://github.com/nanopb/nanopb/security/advisories/GHSA-7mv5-5mxh-qg88
- WEBhttps://github.com/pypa/advisory-database/tree/main/vulns/nanopb/PYSEC-2021-432.yaml