The req_check_access function in the mod_authz_svn module in the httpd server in Apache Subversion before 1.8.16 and 1.9.x before 1.9.4 allo
The req_check_access function in the mod_authz_svn module in the httpd server in Apache Subversion before 1.8.16 and 1.9.x before 1.9.4 allows remote authenticated users to cause a denial of service (NULL pointer dereference and crash) via a crafted header in a (1) MOVE or (2) COPY request, involving an authorization check.
Noroxi analysis
No Noroxi analysis for this record yet
We don't hand-write analysis for the hundreds of thousands of vulnerabilities in the database; that wouldn't be honest. For notable, high-impact vulnerabilities our team writes the mechanism, detection and remediation steps.
We use this product, ask for help- Published
- May 5, 2016
- Updated
- Jun 16, 2026
- EPSS
- 19.9% · 97th percentile
- CWE
- —
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Report tools
Action score
32
Monitor
Low priority for now.
- CVSS
- 26 / 40 · 6.5 / 10
- CISA KEV
- 0 / 30 · Not listed
- EPSS
- 6 / 30 · 19.9%
Affected systems
| Vendor | Product | CPE |
|---|---|---|
| apache | subversion | cpe:2.3:a:apache:subversion |
Affected versions
NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.
- apache subversionup to 1.8.15 inclusive
- apache subversion1.9.0
- apache subversion1.9.1
- apache subversion1.9.2
- apache subversion1.9.3
Package-level exposure
OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.
| Ecosystem | Package | Affected range | Fix |
|---|---|---|---|
| Debian:12 | subversion | before 1.9.4-1 | 1.9.4-1 |
| Debian:7 | subversion | before 1.6.17dfsg-4+deb7u11 | 1.6.17dfsg-4+deb7u11 |
| Debian:8 | subversion | before 1.8.10-6+deb8u4 | 1.8.10-6+deb8u4 |
| SUSE:Linux Enterprise Software Development Kit 11 SP4 | subversion | before 1.6.17-1.35.1 | 1.6.17-1.35.1 |
| SUSE:Linux Enterprise Software Development Kit 12 | subversion | before 1.8.10-21.1 | 1.8.10-21.1 |
| SUSE:Linux Enterprise Software Development Kit 12 SP2 | subversion | before 1.8.19-25.3.1 | 1.8.19-25.3.1 |
Same product
apache: all recordsOther highest-scoring records for the same primary product.
- CVE-2015-5259Integer overflow in the read_string function in libsvn_ra_svn/marshal.c in Apache Subversion 1.9.x before 1.9.3 allows remote attackers to e51Plan
- CVE-2018-11803Subversion's mod_dav_svn Apache HTTPD module versions 1.11.0 and 1.10.0 to 1.10.3 will crash after dereferencing an uninitialized pointer if48Plan
- CVE-2017-9800A maliciously constructed svn+ssh:// URL would cause Subversion clients before 1.8.19, 1.9.x before 1.9.7, and 1.10.0.x through 1.10.0-alpha45Plan
- CVE-2020-17525Remote unauthenticated denial-of-service in Subversion mod_authz_svn42Plan
- CVE-2015-5343Integer 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 authenticate39Monitor
- CVE-2013-2088contrib/hook-scripts/svn-keyword-check.pl in Subversion before 1.6.23 allows remote authenticated users with commit permissions to execute a37Monitor
Remediation
Which version to upgrade to
Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.
| Product / package | Fixed version | Source |
|---|---|---|
| debian:subversion | 1.9.4-1 · Debian:12 | Package registry (OSV) |
| suse:subversion | 1.8.10-21.1 · SUSE:Linux Enterprise Software Development Kit 12 | Package registry (OSV) |
Exploit status
No known public exploit
No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.
Research context
For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.
Timeline
From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.
No dated events beyond publication.
FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).
Patch and commit links
Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.
No commit or PR link among the references.
Credits
All researchersFinders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.
No credits in the CNA record.
Variant candidates
Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.
No nightly-computed relations.
Chain candidates
An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.
—
Bug bounty scope
No known public program.
Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).
Technical details
Attack conditions
- Anyone who can reach it over the internet can trigger it.
- A low-privileged account is enough.
- No user action is required.
- No special conditions are required; it is repeatable.
If successful
- Confidentiality
- none
- Integrity
- none
- Availability
- high · the service can be disrupted
- Attack vector
- Network
- Attack complexity
- Low
- Privileges required
- Low
- User interaction
- None
- Scope
- Unchanged
- Confidentiality impact
- None
- Integrity impact
- None
- Availability impact
- High
Weakness class (CWE)
—
CVSS vector
CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
nvd-primary
Attack context
MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.
MITRE has no CAPEC/ATT&CK mapping for this CWE.
Change log
- Fix✗ → ✓
For records you follow, these changes also arrive as notifications. →
References
- lists.fedoraproject.org/pipermail/package-announce/2016-May/184545.html
- lists.opensuse.org/opensuse-updates/2016-05/msg00043.html
- lists.opensuse.org/opensuse-updates/2016-05/msg00044.html
- mail-archives.apache.org/mod_mbox/subversion-announce/201604.mbox/%3CCAP_GPNgJet+7_MAhomFVOXPgLtewcUw9w=k9zdPCkq5tvPxVMA%40mail.gmail.com%3E
- mail-archives.apache.org/mod_mbox/subversion-announce/201604.mbox/%3CCAP_GPNgfn1iKueW51EpmXzXi_URNfGNofZSgOyW1_jnSeNm5DQ%40mail.gmail.com%3E
- subversion.apache.org/security/CVE-2016-2168-advisory.txt
- www.debian.org/security/2016/dsa-3561
- www.securityfocus.com/bid/89320
- www.securitytracker.com/id/1035707
- www.slackware.com/security/viewer.php?l=slackware-security&y=2016&m=slackware-security.417496
- security.gentoo.org/glsa/201610-05
- www.oracle.com/security-alerts/cpuoct2020.html
Vendor advisories and official records. Exploit/PoC links are deliberately left out.