CVE-2019-13115: debian debian_linux Out-of-bounds Read
Vulnerability summary
CVE-2019-13115 is a high (CVSS 8.1) Out-of-bounds Read vulnerability in debian debian_linux. EPSS estimates a 11.66% chance of exploitation in the next 30 days, higher than 96% of scored vulnerabilities. 1 public exploit is recorded.
Public exploit (reference, Date unknown)
Source freshness unavailable
How is this decided?Advisory lineage
Upstream 0 · Downstream 4 · Related 1Timeline
- 16-07-2019PublishedVulnerability first disclosed.
- 04-08-2024Last modifiedVulnerability information updated.
Description
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.
CVSS metrics
5 scores · 4 sources · 2 versions- OSV · AlpineEcosystem advisory · calculated8.1HighCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:H
- OSV · UbuntuEcosystem advisory · calculated8.1HighCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:H
- OSV · DebianEcosystem advisory · calculated8.1HighCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:H
EPSS trend
Probability
11.66%
Chance of exploitation in the next 30 days
Percentile
96%
Versus all other CVEs
30-day change
No change 0.00 pp
From 11.66% on 04-10-2026
Known exploited
Compare KEV catalogs
CISA KEVNot in the CISA KEV catalog.
ENISA CNWNot in the ENISA CNW catalog.
CIRCLNot in the CIRCL catalog.
Public exploits
1 foundExploit Reference (blog.semmle.com)
Maturity: unknown
Weaknesses
CWE · root cause- CWE-125Out-of-bounds ReadThe product reads data past the end, or before the beginning, of the intended buffer.
- CWE-190Integer Overflow or WraparoundThe product performs a calculation that can produce an integer overflow or wraparound when the logic assumes that the resulting value will always be larger than the original value. This occurs when an integer value is incremented to a value that is too large to store in the associated representation. When this occurs, the value may become a very small or negative number.
Affected systems
Known conditions: network-reachable, no authentication, user interaction (CVSS vector). Other conditions: not stated in public data.
Netapp3 products
- cloud_backupna
- e-series_santricity_os_controller≥ 11.0.0, ≤ 11.70.1
- ontap_select_deploy_administration_utilityna
Debian2 products
- libssh2< 1.9.0-1
- debian_linuxEOL8.0 | 9.0
Alpine1 product
- libssh2< 1.9.0-r0
F51 product
- traffix_systems_signaling_delivery_controller≥ 5.0.0, ≤ 5.1.0
Fedoraproject1 product
- fedoraEOL29 | 30
Libssh21 product
- libssh2< 1.9.0
Ubuntu1 product
- libssh2< 1.4.3-2ubuntu0.2+esm2 | < 1.5.0-2ubuntu0.1+esm1 | All versions (No fix recorded)
7 vendors · 10 products
References
20 links- github.com/libssh2/libssh2/compare/02ecf17...42d37aaThird Party Advisory
- lists.fedoraproject.org/archives/…Vendor Advisory
- lists.fedoraproject.org/archives/…Vendor Advisory
- security.netapp.com/advisory/ntap-20190806-0002/Third Party Advisory
- support.f5.com/csp/article/K13322484Third Party Advisory
Show all 20 references
- lists.apache.org/thread.html/…Mailing List
- lists.apache.org/thread.html/…Mailing List