Out-of-bounds Read in F5 Traffix Systems Signaling Delivery Controller
CVE-2019-13115
In libssh2 before 1.9.0, kex_method_diffie_hellman_group_exchange_sha256_key_exchange in kex.c has an integer overflow that could lead to an out-of-bounds read in the way packets are read from the server. A remote attacker who compromises a SSH server may be able to disclose sensitive information or cause a denial of service condition on the client system when a user connects to the server. This is related to an _libssh2_check_length mistake, and is different from the various issues fixed in 1.8.1, such as CVE-2019-3855.
Vulnerability class: Buffer Overflow
Published · last modified .
CVSS v3 metric
CVSS v3 base score 8.1 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:H.
EPSS exploit prediction
EPSS: 0.117 (95.9th percentile), scored .
Moderate probability of exploitation in the next 30 days — watch for active exploitation reports. 96th percentile — 95.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.117 · newest: 0.117 · change: 0.000
Affected products
Weakness classification (CWE)
Public proof-of-concept exploits
References
- github.com/libssh2/libssh2/pull/350 (Third Party Advisory, Issue Tracking)
- libssh2.org/changes.html (Release Notes, Vendor Advisory)
- github.com/libssh2/libssh2/compare/02ecf17...42d37aa (Third Party Advisory)
- blog.semmle.com/libssh2-integer-overflow/ (Exploit, Third Party Advisory)
- lists.debian.org/debian-lts-announce/2019/07/msg00024.html (mailing-list, Mailing List, Third Party Advisory)
- lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/… (vendor-advisory)
- lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/… (vendor-advisory)
- security.netapp.com/advisory/ntap-20190806-0002/ (Third Party Advisory)
- support.f5.com/csp/article/K13322484 (Third Party Advisory)
- support.f5.com/csp/article/K13322484
Frequently asked questions
- What is CVE-2019-13115?
- CVE-2019-13115 is a high-severity vulnerability in F5 Traffix Systems Signaling Delivery Controller, classified under Out-of-bounds Read. CVSS score: 8.1/10. Published 2019-07-16.
- How severe is CVE-2019-13115?
- High severity. CVSS v3 base score is 8.1 out of 10.
- Is CVE-2019-13115 known to be exploited?
- 7 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.