CVE-2016-8569: The git_oid_nfmt function in commit.c in libgit2 before 0.24.3 allows remote attackers to cause a denial of service (NULL pointer…
Noroxi assessment
Priority: Monitor (action score 23/100)
- The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
- Probability of exploitation in the next 30 days: 1.8% (FIRST EPSS); higher than 79.7% of all records.
- Someone with local access to the system can trigger it. No account or password is required. A user must open a link or visit a page. No special conditions are required; it is repeatable.
- Fixed version: libgit2 (Alpine:v3.10) 0.24.3-r0; libgit2-0.27 (Alpine:v3.10) 0.24.3-r0; libgit2-1.0 (Alpine:v3.13) 0.24.3-r0.
Low priority for now. Upgrade to libgit2 (Alpine:v3.10) 0.24.3-r0; libgit2-0.27 (Alpine:v3.10) 0.24.3-r0; libgit2-1.0 (Alpine:v3.13) 0.24.3-r0 or later.
Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it
Primary sources: NVD · CVE.org · FIRST EPSS
The git_oid_nfmt function in commit.c in libgit2 before 0.24.3 allows remote attackers to cause a denial of service (NULL pointer dereference) via a cat-file command with a crafted object file.
- Published
- Feb 3, 2017
- Updated
- Jun 16, 2026
- EPSS
- 1.8% · 79th percentile
- CWE
- CWE-476
Report tools
Action score
23
Low priority for now.
- CVSS
- 22 / 40 · 5.5 / 10
- CISA KEV
- 0 / 30 · Not listed
- EPSS
- 1 / 30 · 1.8%
Get told when this record changes
- Not in KEV: no record of exploitation in the wild
- No public exploit code on record
- A fix has been released
If any of these changes, we'll tell you in the daily email digest.
Is your version affected? Check itNoroxi analysis
What does it mean in your environment?
The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.
We use this product, ask for helpAffected systems
Is your version affected?
Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.
| Vendor | Product | CPE |
|---|---|---|
| libgit2 project | libgit2 | cpe:2.3:a:libgit2_project:libgit2 |
| fedoraproject | fedora | cpe:2.3:o:fedoraproject:fedora |
| opensuse | leap | cpe:2.3:o:opensuse:leap |
| opensuse | opensuse | cpe:2.3:o:opensuse:opensuse |
| suse | linux enterprise | cpe:2.3:o:suse:linux_enterprise |
Affected versions
NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.
- fedoraproject fedora23
- fedoraproject fedora24
- fedoraproject fedora25
- libgit2 project libgit2up to 0.24.2 inclusive
- opensuse leap42.1
- opensuse leap42.2
- opensuse opensuse13.2
- suse linux enterprise12.0
Package-level exposure
OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.
| Ecosystem | Package | Affected range | Fix |
|---|---|---|---|
| Alpine:v3.10 | libgit2 | before 0.24.3-r0 | 0.24.3-r0 |
| Alpine:v3.10 | libgit2-0.27 | before 0.24.3-r0 | 0.24.3-r0 |
| Alpine:v3.13 | libgit2-1.0 | before 0.24.3-r0 | 0.24.3-r0 |
| Alpine:v3.15 | libgit2-1.1 | before 0.24.3-r0 | 0.24.3-r0 |
| Debian:12 | cargo | before 0.17.0-1 | 0.17.0-1 |
| Debian:12 | libgit2 | before 0.24.2-2 | 0.24.2-2 |
| openSUSE:Tumbleweed | libgit2 | before 0.24.3-1.1 | 0.24.3-1.1 |
| SUSE:Linux Enterprise Software Development Kit 12 SP2 | libgit2 | before 0.24.1-3.1 | 0.24.1-3.1 |
| SUSE:Package Hub 12 SP1 | libgit2 | before 0.24.3-6.1 | 0.24.3-6.1 |
Same product
libgit2 project: all recordsOther highest-scoring records for the same primary product.
- CVE-2016-10128Buffer overflow in the git_pkt_parse_line function in transports/smart_pkt.c in the Git Smart Protocol support in libgit2 before 0.24.6 and…40Plan
- CVE-2016-10129The Git Smart Protocol support in libgit2 before 0.24.6 and 0.25.x before 0.25.1 allows remote attackers to cause a denial of service (NULL…31Monitor
- CVE-2016-10130The http_connect function in transports/http.c in libgit2 before 0.24.6 and 0.25.x before 0.25.1 might allow man-in-the-middle attackers to…24Monitor
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 |
|---|---|---|
| alpine:libgit2 | 0.24.3-r0 · Alpine:v3.10 | Package registry (OSV) |
| alpine:libgit2-0.27 | 0.24.3-r0 · Alpine:v3.10 | Package registry (OSV) |
| alpine:libgit2-1.0 | 0.24.3-r0 · Alpine:v3.13 | Package registry (OSV) |
| alpine:libgit2-1.1 | 0.24.3-r0 · Alpine:v3.15 | Package registry (OSV) |
| debian:cargo | 0.17.0-1 · Debian:12 | Package registry (OSV) |
| debian:libgit2 | 0.24.2-2 · Debian:12 | Package registry (OSV) |
| opensuse:libgit2 | 0.24.3-1.1 · openSUSE:Tumbleweed | Package registry (OSV) |
| suse:libgit2 | 0.24.1-3.1 · SUSE:Linux Enterprise Software Development Kit 12 SP2 | 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).
Not on record for this CVE: patch commit or PR link · researcher credit · variant or chain candidate · public bounty program.
Technical details
Attack conditions
- Someone with local access to the system can trigger it.
- No account or password is required.
- A user must open a link or visit a page.
- No special conditions are required; it is repeatable.
If successful
- Confidentiality
- none
- Integrity
- none
- Availability
- high · the service can be disrupted
- Attack vector
- Local
- Attack complexity
- Low
- Privileges required
- None
- User interaction
- Required
- Scope
- Unchanged
- Confidentiality impact
- None
- Integrity impact
- None
- Availability impact
- High
Weakness class (CWE)
CWE-476 · NULL Pointer DereferenceCVSS vector
CVSS:3.0/AV:L/AC:L/PR:N/UI:R/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 (1)
- Fix✗ → ✓
For records you follow, these changes also arrive as notifications. →
References
Show all references (11 more)Show less
- lists.opensuse.org/opensuse-updates/2017-01/msg00103.html
- lists.opensuse.org/opensuse-updates/2017-01/msg00110.html
- lists.opensuse.org/opensuse-updates/2017-01/msg00114.html
- www.openwall.com/lists/oss-security/2016/10/08/7
- www.securityfocus.com/bid/93465
- bugzilla.redhat.com/show_bug.cgi?id=1383211
- github.com/libgit2/libgit2/issues/3937
- github.com/libgit2/libgit2/releases/tag/v0.24.3
- lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/4E77DG5KGQ7L34U75QY7O6NIPKZNQHQJ/
- lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/X3JBSNJAXP7JA3TGE2NPNRTD77JXFG4E/
- lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/XVUEIG6EESZB6BRU2IE3F5NRUEHMAEKC/
Vendor advisories and official records. Exploit/PoC links are deliberately left out.