VulnerabilityModified
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 keys via a timing side-channel attack.
HIGH 7.5EPSS 2.44%
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (2.44%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
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 keys via a timing side-channel attack.
- CVSS 3.0
- 7.5 HIGHCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
- EPSS
- 2.44% probability · 83th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-200
- Affected
- debian/debian linux · fedoraproject/fedora · botan project/botan
- Source
- cve@mitre.org
References
- http://botan.randombit.net/security.htmlVendor Advisory
- http://lists.fedoraproject.org/pipermail/package-announce/2016-May/183669.html
- http://marc.info/?l=botan-devel&m=146185420505943&w=2Vendor Advisory
- http://www.debian.org/security/2016/dsa-3565
- https://security.gentoo.org/glsa/201701-23
- http://botan.randombit.net/security.htmlVendor Advisory
- http://lists.fedoraproject.org/pipermail/package-announce/2016-May/183669.html
- http://marc.info/?l=botan-devel&m=146185420505943&w=2Vendor Advisory
- http://www.debian.org/security/2016/dsa-3565
- https://security.gentoo.org/glsa/201701-23
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.