CVE-2016-2195
Publication date 13 May 2016
Last updated 24 July 2024
Ubuntu priority
Cvss 3 Severity Score
Integer overflow in the PointGFp constructor in Botan before 1.10.11 and 1.11.x before 1.11.27 allows remote attackers to overwrite memory and possibly execute arbitrary code via a crafted ECC point, which triggers a heap-based buffer overflow. The bigint_mul and bigint_sqr functions received the size of the output buffer, but only used it to dispatch to a faster algorithm in cases where there was sufficient output space to call an unrolled multiplication function. The result is a heap overflow accessible via ECC point decoding, which accepted untrusted inputs. This is likely exploitable for remote code execution.
Status
Package | Ubuntu Release | Status |
---|---|---|
botan1.10 | ||
16.04 LTS xenial |
Not affected
|
|
14.04 LTS trusty |
Fixed 1.10.5-1+deb7u1ubuntu0.14.04.1
|
|
Notes
Severity score breakdown
Parameter | Value |
---|---|
Base score | 9.8 · Critical |
Attack vector | Network |
Attack complexity | Low |
Privileges required | None |
User interaction | None |
Scope | Unchanged |
Confidentiality | High |
Integrity impact | High |
Availability impact | High |
Vector | CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |