CVE-2016-2195
Published: 13 May 2016
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.
Notes
Author | Note |
---|---|
seth-arnold | "Introduced in 1.9.18, fixed in 1.11.27 and 1.10.11" |
Priority
Status
Package | Release | Status |
---|---|---|
botan1.10 Launchpad, Ubuntu, Debian |
precise |
Ignored
(end of life)
|
upstream |
Released
(1.10.12-1)
|
|
wily |
Ignored
(end of life)
|
|
xenial |
Not vulnerable
(1.10.12-1)
|
|
yakkety |
Not vulnerable
(1.10.12-1)
|
|
zesty |
Not vulnerable
(1.10.12-1)
|
|
trusty |
Released
(1.10.5-1+deb7u1ubuntu0.14.04.1)
|
Severity score breakdown
Parameter | Value |
---|---|
Base score | 9.8 |
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 |