GitHub Advisory DatabaseGHSA-QCJ7-G2J5-G7R3In Bouncy Castle JCE Provider ECDSA does not fully validate ASN.1 encoding of signature on verification
5 Medium
CVSS2
Attack Vector
NETWORK
Attack Complexity
LOW
Authentication
NONE
Confidentiality Impact
NONE
Integrity Impact
PARTIAL
Availability Impact
NONE
AV:N/AC:L/Au:N/C:N/I:P/A:N
7.5 High
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
HIGH
Availability Impact
NONE
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
0.005 Low
EPSS
Percentile
77.2%
In the Bouncy Castle JCE Provider version 1.55 and earlier ECDSA does not fully validate ASN.1 encoding of signature on verification. It is possible to inject extra elements in the sequence making up the signature and still have it validate, which in some cases may allow the introduction of ‘invisible’ data into a signed structure.
Affected configurations
| CPE | Name | Operator | Version |
|---|---|---|---|
| org.bouncycastle:bcprov-jdk15 | lt | 1.56 | |
| org.bouncycastle:bcprov-jdk14 | lt | 1.56 |
References
access.redhat.com/errata/RHSA-2018:2669
access.redhat.com/errata/RHSA-2018:2927
github.com/advisories/GHSA-qcj7-g2j5-g7r3
github.com/bcgit/bc-java/commit/843c2e60f67d71faf81d236f448ebbe56c62c647#diff-25c3c78db788365f36839b3f2d3016b9
lists.debian.org/debian-lts-announce/2018/07/msg00009.html
nvd.nist.gov/vuln/detail/CVE-2016-1000342
security.netapp.com/advisory/ntap-20181127-0004/
usn.ubuntu.com/3727-1/
www.oracle.com/security-alerts/cpuoct2020.html
Related
5 Medium
CVSS2
Attack Vector
NETWORK
Attack Complexity
LOW
Authentication
NONE
Confidentiality Impact
NONE
Integrity Impact
PARTIAL
Availability Impact
NONE
AV:N/AC:L/Au:N/C:N/I:P/A:N
7.5 High
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
HIGH
Availability Impact
NONE
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
0.005 Low
EPSS
Percentile
77.2%