CVE-2019-11841
golang-go.crypto - security update
描述
A message-forgery issue was discovered in crypto/openpgp/clearsign/clearsign.go in supplementary Go cryptography libraries 2019-03-25. According to the OpenPGP Message Format specification in RFC 4880 chapter 7, a cleartext signed message can contain one or more optional "Hash" Armor Headers. The "Hash" Armor Header specifies the message digest algorithm(s) used for the signature. However, the Go clearsign package ignores the value of this header, which allows an attacker to spoof it. Consequently, an attacker can lead a victim to believe the signature was generated using a different message digest algorithm than what was actually used. Moreover, since the library skips Armor Header parsing in general, an attacker can not only embed arbitrary Armor Headers, but also prepend arbitrary text to cleartext messages without invalidating the signatures.
如何修補 CVE-2019-11841
要修補 CVE-2019-11841,請將受影響套件升級到下列已修補版本。
- —升級至 1:0.0~git20200221.2aa609c-1 或更新版本
- —升級至 0.0~hg190-1+deb8u2 或更新版本
- —升級至 0.0.0-20190424203555-c05e17bb3b2d 或更新版本
- —升級至 0.0.0-20190424203555-c05e17bb3b2d 或更新版本
CVE-2019-11841 正在被利用嗎?
低 — EPSS 為 2.0%,目前沒有觀察到大規模利用活動。
受影響套件(4)
- from 0, < 1:0.0~git20200221.2aa609c-1
- from 0, < 0.0~hg190-1+deb8u2
- from 0, < 0.0.0-20190424203555-c05e17bb3b2d
- from 0, < 0.0.0-20190424203555-c05e17bb3b2d
CVSS 分數
| 來源 | 版本 | 嚴重程度 | 向量 |
|---|---|---|---|
| osv | CVSS 3.1 | MEDIUM5.9 | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N |