VulnerabilityModified

CVE-2015-2318

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.

HIGH 8.1EPSS 1.97%

Does this matter?

High impact if exploited, but EPSS currently rates exploitation as unlikely (1.97%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.

Description

CVSS 3.0: 8.1 HIGHCVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS: 1.97% probability · 79th percentile
CISA KEV: Not listed
Weakness: CWE-295
Affected: mono-project/mono · debian/debian linux
Source: cve@mitre.org

References

http://www.mono-project.com/news/2015/03/07/mono-tls-vulnerability/Vendor Advisory
http://www.openwall.com/lists/oss-security/2015/03/17/9Mailing List, Third Party Advisory
http://www.securityfocus.com/bid/73253Third Party Advisory, VDB Entry
http://www.ubuntu.com/usn/USN-2547-1Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=1202869Issue Tracking, Third Party Advisory
https://github.com/mono/mono/commit/1509226c41d74194c146deb173e752b8d3cdeec4Third Party Advisory
https://mitls.org/pages/attacks/SMACK#skipThird Party Advisory
https://www.debian.org/security/2015/dsa-3202Third Party Advisory
http://www.mono-project.com/news/2015/03/07/mono-tls-vulnerability/Vendor Advisory
http://www.openwall.com/lists/oss-security/2015/03/17/9Mailing List, Third Party Advisory
http://www.securityfocus.com/bid/73253Third Party Advisory, VDB Entry
http://www.ubuntu.com/usn/USN-2547-1Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=1202869Issue Tracking, Third Party Advisory
https://github.com/mono/mono/commit/1509226c41d74194c146deb173e752b8d3cdeec4Third Party Advisory
https://mitls.org/pages/attacks/SMACK#skipThird Party Advisory
https://www.debian.org/security/2015/dsa-3202Third Party Advisory

Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.