CVE-2016-1000342
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.
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (1.80%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
Description
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.
- CVSS 3.0
- 7.5 HIGHCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
- EPSS
- 1.80% probability · 77th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-347
- Affected
- bouncycastle/bc-java · debian/debian linux
- Source
- cve@mitre.org
References
- https://access.redhat.com/errata/RHSA-2018:2669
- https://access.redhat.com/errata/RHSA-2018:2927
- https://github.com/bcgit/bc-java/commit/843c2e60f67d71faf81d236f448ebbe56c62c647#diff-25c3c78db788365f36839b3f2d3016b9Patch, Third Party Advisory
- https://lists.debian.org/debian-lts-announce/2018/07/msg00009.htmlThird Party Advisory
- https://security.netapp.com/advisory/ntap-20181127-0004/
- https://usn.ubuntu.com/3727-1/
- https://www.oracle.com/security-alerts/cpuoct2020.html
- https://access.redhat.com/errata/RHSA-2018:2669
- https://access.redhat.com/errata/RHSA-2018:2927
- https://github.com/bcgit/bc-java/commit/843c2e60f67d71faf81d236f448ebbe56c62c647#diff-25c3c78db788365f36839b3f2d3016b9Patch, Third Party Advisory
- https://lists.debian.org/debian-lts-announce/2018/07/msg00009.htmlThird Party Advisory
- https://security.netapp.com/advisory/ntap-20181127-0004/
- https://usn.ubuntu.com/3727-1/
- https://www.oracle.com/security-alerts/cpuoct2020.html
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.