Improper Certificate Validation in Debian Linux - CVE-2015-2318
Published: January 8, 2018 / Updated: August 8, 2020
Vulnerability identifier: #VU37697
CSH Severity: High
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber
CVE-ID: CVE-2015-2318
CWE-ID: CWE-295
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: Debian
Affected software:
Debian Linux
Debian Linux
Detailed vulnerability description
The vulnerability allows a remote non-authenticated attacker to execute arbitrary code.
The TLS stack in Mono before 3.12.1 allows man-in-the-middle attackers to conduct message skipping attacks and consequently impersonate clients by leveraging missing handshake state validation, aka a "SMACK SKIP-TLS" issue.
How to mitigate CVE-2015-2318
Install update from vendor's website.
Sources
- http://www.mono-project.com/news/2015/03/07/mono-tls-vulnerability/
- http://www.openwall.com/lists/oss-security/2015/03/17/9
- http://www.securityfocus.com/bid/73253
- http://www.ubuntu.com/usn/USN-2547-1
- https://bugzilla.redhat.com/show_bug.cgi?id=1202869
- https://github.com/mono/mono/commit/1509226c41d74194c146deb173e752b8d3cdeec4
- https://mitls.org/pages/attacks/SMACK#skip
- https://www.debian.org/security/2015/dsa-3202