CVE-2015-5343

Integer overflow in util.c in mod_dav_svn in Apache Subversion 1.7.x, 1.8.x before 1.8.15, and 1.9.x before 1.9.3 allows remote authenticated users to cause a denial of service (subversion server crash or memory consumption) and possibly execute arbitrary code via a skel-encoded request body, which triggers an out-of-bounds read and heap-based buffer overflow.

Published: 2016-04-14 Last update: 2026-05-06 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2015-5343 is rated High Risk (68.9/100): CVSS High severity, with high exploitation likelihood (EPSS 23.93%, 96th percentile). EPSS ranks this CVE among the most likely to be exploited in the near term. EPSS rose +4.84% over the last day, indicating growing attacker interest. High exploitation likelihood—assess exposure and prioritize remediation.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2015-5343

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-05-13 19.09% 23.93% +4.84%
2 2025-12-28 24.98% 19.09% -5.89%
3 2025-12-27 — 24.98% —

Full EPSS history (15 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2015-5343

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
7.6 3.0 HIGH
CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:H Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:L)
A normal user session is enough; they don’t have to be admin.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:L)
Some sensitive info could get out, but not a total data dump.
Integrity (I:L)
Attackers could change some data, but it’s limited—not everything goes.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 2.8 4.7 [email protected]
8.0 2.0 HIGH
AV:N/AC:L/Au:S/C:P/I:P/A:C Click to expand
Access vector (AV:N)
Can be exploited remotely over network reachability.
Access complexity (AC:L)
Exploitation conditions are straightforward and predictable.
Authentication (AU:S)
A single authentication is required.
Confidentiality impact (C:P)
Partial confidentiality impact.
Integrity impact (I:P)
Partial integrity impact.
Availability impact (A:C)
Complete availability impact.
 8.0 8.5 [email protected]

Weakness enumeration for CVE-2015-5343

OS Trackers for CVE-2015-5343

vendor priority summary link
debian not yet assigned CVE-2015-5343 not yet assigned priority: Debian including 1 source packages (subversion), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 5. https://security-tracker.debian.org/tracker/CVE-2015-5343
redhat medium — https://access.redhat.com/security/cve/CVE-2015-5343
ubuntu medium CVE-2015-5343 medium priority: Ubuntu including 1 source packages (subversion), 8 status rows across 8 suites (precise, trusty, upstream, vivid, wily, xenial, yakkety, zesty): not-affected 4, ignored 2, released 2. https://ubuntu.com/security/CVE-2015-5343

Affected software / configurations for CVE-2015-5343

Vendor Product Version Raw CPE
apache subversion >= 1.7.0, <= 1.7.20 cpe:2.3:a:apache:subversion:*:*:*:*:*:*:*:*
apache subversion >= 1.8.0, < 1.8.15 cpe:2.3:a:apache:subversion:*:*:*:*:*:*:*:*
apache subversion >= 1.9.0, < 1.9.3 cpe:2.3:a:apache:subversion:*:*:*:*:*:*:*:*
debian debian_linux 8.0 cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:*

References for CVE-2015-5343

cvelogic Threat Intelligence