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CVE-2024-5463· NVD / CVE Program· CNA synology

A vulnerability regarding buffer copy without checking the size of input ('Classic Buffer Overflow') has been found in the login component.

A vulnerability regarding buffer copy without checking the size of input ('Classic Buffer Overflow') has been found in the login component. This allows remote attackers to write specific files containing non-sensitive information and conduct limited denial-of-service attacks via unspecified vectors. This attack only affects the login service which will automatically restart. The following models with Synology Camera Firmware versions before 1.1.1-0383 may be affected: BC500 and TC500.

MediumCVSS 6.5 · v3.1—No exploit Fix available
Published
Jun 4, 2024
Updated
Jun 17, 2026
EPSS
0.4% · 32th percentile
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Action score

26

Monitor

Low priority for now.

CVSS
26 / 40 · 6.5 / 10
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.4%

CISA SSVC decision

Exploitation
none
Automatable
yes
Technical impact
partial

Vulnrichment: CISA's decision-tree inputs.

CNA vs NVD score

NVD
6.5
CNA · synology
6.5
agree

The score given by the assigning authority versus NVD’s independent score. A gap means the severity is contested.

Affected systems

VendorProduct
synologybc500 firmware
synologybc500
synologytc500 firmware
synologytc500

Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

  • synology bc500 firmwarebefore 1.1.1-0383
  • synology tc500 firmwarebefore 1.1.1-0383

Versions reported by the vendor

Affected version ranges reported by the assigning authority (synology). Independent of NVD's CPE analysis and usually ahead of it.

  • Synology Camera Firmware

    • 1.1 and later · before 1.1.1-0383affected · semver
    • 1.0 and later · before 1.1.1-0383affected · semver

Same product

synology: all records

Other highest-scoring records for the same primary product.

  • CVE-2023-5746A vulnerability regarding use of externally-controlled format string is found in the cgi component.
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  • CVE-2024-39349A vulnerability regarding buffer copy without checking size of input ('Classic Buffer Overflow') is found in the libjansson component and it
    39Monitor
  • CVE-2024-39351A vulnerability regarding improper neutralization of special elements used in an OS command ('OS Command Injection') is found in the NTP con
    28Monitor
  • CVE-2023-47802A vulnerability regarding improper neutralization of special elements used in an OS command ('OS Command Injection') is found in the IP bloc
    28Monitor
  • CVE-2023-47803A vulnerability regarding improper limitation of a pathname to a restricted directory ('Path Traversal') is found in the Language Settings f
    21Monitor
  • CVE-2024-39352A vulnerability regarding incorrect authorization is found in the firmware upgrade functionality.
    19Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / packageFixed versionSource
Synology Camera Firmware1.1.1-0383Vendor (CNA)

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.

EPSS, last 120 days

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 researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

  • CVE-2024-3934924 days apartA vulnerability regarding buffer copy without checking size of input ('Classic Buffer Overflow') is found in the libjansson component and it
    39Monitor

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.
  • No account or password is required.
  • No user action is required.
  • No special conditions are required; it is repeatable.

If successful

Confidentiality
none
Integrity
low · data or configuration can be modified
Availability
low · the service can be disrupted
Attack vector
Network
Attack complexity
Low
Privileges required
None
User interaction
None
Scope
Unchanged
Confidentiality impact
None
Integrity impact
Low
Availability impact
Low

Weakness class (CWE)

CWE-120 · Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L

nvd-primary

Root cause

When data is copied, the source length is not compared with the size of the destination buffer. Excess data overwrites adjacent memory.

The bug in code

The whole CWE-120 class

A representative example of this vulnerability class. Not the vendor's source code; it shows the faulty pattern and its fix.

Vulnerable

c
char buf[256];memcpy(buf, pkt->data, pkt->len);

Fixed

c
char buf[256];if (pkt->len > sizeof(buf)) {  return -EINVAL;}memcpy(buf, pkt->data, pkt->len);

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

ATT&CK techniques

—

Noroxi analysis

No Noroxi analysis for this record yet

We don't hand-write analysis for all 385,000+ vulnerabilities; 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

Change log

  1. Fix✗ → ✓

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References

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records