CVE-2017-0904
private_address_check vulnerable to bypass of Resolv.getaddresses method
CVE-2017-0904 is a high vulnerability (CVSS 8.1) in Hackerone Private Address Check Ruby Gem, published November 13, 2017. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 2.42%, the 84th percentile. Fixed in private_address_check 0.4.0.
The private_address_check ruby gem before 0.4.0 is vulnerable to a bypass due to use of Ruby's Resolv.getaddresses method, which is OS-dependent and should not be relied upon for security measures, such as when used to blacklist private network addresses to prevent server-side request forgery.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- High
- Privileges needed
- None
- User interaction
- None
What an attacker can affect
- Confidentiality
- High
- Integrity
- High
- Availability
- High
Exploit likelihood
What each source reports
NVD Score used
The private_address_check ruby gem before 0.4.0 is vulnerable to a bypass due to use of Ruby's Resolv.getaddresses method, which is OS-dependent and should not be relied upon for security measures, such as when used to blacklist private network addresses to prevent server-side request forgery.
- Record
CVE-2017-0904- CVSS 3.0
- 8.1 High
CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H - CVSS 2.0
- 6.8 Medium
AV:N/AC:M/Au:N/C:P/I:P/A:P - Weakness
- CWE-242, CWE-755
- Updated
- 2026-11-02
CVE List No score
The private_address_check ruby gem before 0.4.0 is vulnerable to a bypass due to use of Ruby's Resolv.getaddresses method, which is OS-dependent and should not be relied upon for security measures, such as when used to blacklist private network addresses to prevent server-side request forgery.
- Record
CVE-2017-0904- Weakness
- CWE-242
- Updated
- 2026-11-02
EUVDEUVD-2017-0348 No score
The private_address_check ruby gem before 0.4.0 is vulnerable to a bypass due to use of Ruby's Resolv.getaddresses method, which is OS-dependent and should not be relied upon for security measures, such as when used to blacklist private network addresses to prevent server-side request forgery.
- Record
EUVD-2017-0348- Updated
- 2026-11-03
GitHub AdvisoriesGHSA-hxhj-hp9m-qwc4 No score
private_address_check vulnerable to bypass of Resolv.getaddresses method
The private_address_check ruby gem before 0.4.0 is vulnerable to a bypass due to use of Ruby's Resolv.getaddresses method, which is OS-dependent and should not be relied upon for security measures, such as when used to blacklist private network addresses to prevent server-side request forgery.
- Record
GHSA-hxhj-hp9m-qwc4- Weakness
- CWE-242
- Updated
- 2026-11-02
OSV
The private_address_check ruby gem before 0.4.0 is vulnerable to a bypass due to use of Ruby's Resolv.getaddresses method, which is OS-dependent and should not be relied upon for security measures, such as when used to blacklist private network addresses to prevent server-side request forgery.
- Record
CVE-2017-0904- CVSS 3.0
- 8.1 High
CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H - Updated
- 2026-11-02
OSVGHSA-hxhj-hp9m-qwc4 No score
private_address_check vulnerable to bypass of Resolv.getaddresses method
The private_address_check ruby gem before 0.4.0 is vulnerable to a bypass due to use of Ruby's Resolv.getaddresses method, which is OS-dependent and should not be relied upon for security measures, such as when used to blacklist private network addresses to prevent server-side request forgery.
- Record
GHSA-hxhj-hp9m-qwc4- Weakness
- CWE-242
- Updated
- 2026-11-02
Affected products
Affected packages
| Package | Affected | Fixed |
|---|---|---|
private_address_checkRubyGems |
before 0.4.0 | 0.4.0 |
private_address_checkRubyGems |
before 0.4.0, plus listed versions 0.1.00.2.00.3.0 |
0.4.0 |
History
| When | Changed | Sources |
|---|---|---|
| 2026-11-03 | aliases, products | EUVD |
| 2026-11-02 | created | CVE List, GitHub Advisories, NVD, OSV |
References
hackerone.com/reports/287245
edoverflow.com/2017/ruby-resolv-bug
github.com/jtdowney/private_address_check/issues/1
nvd.nist.gov/vuln/detail/CVE-2017-0904