CVE-2016-2849
Botan before 1.10.13 and 1.11.x before 1.11.29 do not use a constant-time algorithm to perform a modular inverse on the signature nonce k, which might allow remote attackers to obtain ECDSA secret
02 Description
Botan before 1.10.13 and 1.11.x before 1.11.29 do not use a constant-time algorithm to perform a modular inverse on the signature nonce k, which might allow remote attackers to obtain ECDSA secret
03 Exploitation and scoring
- Exploitation
- Not assessed. CISA has not published an exploitation assessment for this record, and it is not in the KEV catalog. That is an absence of assessment, not a finding of no risk.
- SSVC decision
- Not assessed by CISA
- EPSS probability
- 2.81% probability of exploitation activity in the next 30 days.
- EPSS percentile
- Equal to or higher than the score of 86.1% of scored records. A rank, not a probability.
- NVD base score
- 7.5 (CVSS v3.x), scored by the NVD independently of the CNA.
- NVD CVSS vector
- CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
- NVD analysis status
- Modified. NVD last modified this record on 2026-06-17.
- Red Hat severity
- No Red Hat rating. Red Hat rates the CVEs that affect its products.
Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.
04 Metadata
- Published
- 2016-05-13 14:00Z10 YR AGO
- Last updated
- 2024-08-05 23:32Z2 YR AGO
- Reserved
- 2016-03-06
- Assigning CNA
- mitre
- Record state
- PUBLISHED
- Severity
- Not rated by the issuing CNA
- CNA CVSS vector
- Not published by the issuing CNA
- Weaknesses
- CWE-200Exposure of Sensitive Information to an Unauthorized ActorClass
- Data version
- 5.1
- Document digest
- 314c9bab946542b989a4840a80f3b40220b98f6b831a139d16633b3ef84e0180
05 Affected products
06 References
- lists.fedoraproject.orgFEDORA-2016-a545f81683http://lists.fedoraproject.org/pipermail/package-announce/2016-May/183669.html
- www.debian.orgDSA-3565http://www.debian.org/security/2016/dsa-3565
- marc.info[botan-devel] 20160428 Botan 1.10.13 releasedhttp://marc.info/?l=botan-devel&m=146185420505943&w=2
- security.gentoo.orgGLSA-201701-23https://security.gentoo.org/glsa/201701-23
- botan.randombit.nethttp://botan.randombit.net/security.html
07 Fixed in
Ubuntu 14.04 LTS
- botan1.10 Fixed in 1.10.5-1+deb7u1ubuntu0.14.04.1
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu 16.04 LTS
- botan1.10 No fix yet
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
A release or ecosystem missing from this list has no record here. It may be unaffected or not covered by the source. Source notices and licences.