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CVE-2017-16654

Symfony Directory Traversal

7.5 HighFix available

An issue was discovered in Symfony before 2.7.38, 2.8.31, 3.2.14, 3.3.13, 3.4-BETA5, and 4.0-BETA5. The Intl component includes various bundle readers that are used to read resource bundles from the local filesystem. The read() methods of these classes use a path and a locale to determine the language bundle to retrieve. The locale argument value is commonly retrieved from untrusted user input (like a URL parameter). An attacker can use this argument to navigate to arbitrary directories via the dot-dot-slash attack, aka Directory Traversal.

Attack profile

How easy it is to exploit

Attack vector
Network
Complexity
Low
Privileges needed
None
User interaction
None

What an attacker can affect

Confidentiality
High
Integrity
None
Availability
None

Exploit likelihood

2.68%Up 1.6 points since Apr 14, 2021
90%50%10%1%

What each source reports

NVD Score used 7.5

An issue was discovered in Symfony before 2.7.38, 2.8.31, 3.2.14, 3.3.13, 3.4-BETA5, and 4.0-BETA5. The Intl component includes various bundle readers that are used to read resource bundles from the local filesystem. The read() methods of these classes use a path and a locale to determine the language bundle to retrieve. The locale argument value is commonly retrieved from untrusted user input (like a URL parameter). An attacker can use this argument to navigate to arbitrary directories via the dot-dot-slash attack, aka Directory Traversal.

Record
CVE-2017-16654
CVSS 3.0
7.5 HighCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
CVSS 2.0
5.0 MediumAV:N/AC:L/Au:N/C:P/I:N/A:N
Weakness
CWE-22
Updated
2026-11-02
CVE List No score

An issue was discovered in Symfony before 2.7.38, 2.8.31, 3.2.14, 3.3.13, 3.4-BETA5, and 4.0-BETA5. The Intl component includes various bundle readers that are used to read resource bundles from the local filesystem. The read() methods of these classes use a path and a locale to determine the language bundle to retrieve. The locale argument value is commonly retrieved from untrusted user input (like a URL parameter). An attacker can use this argument to navigate to arbitrary directories via the dot-dot-slash attack, aka Directory Traversal.

Record
CVE-2017-16654
Updated
2026-11-02
EUVDEUVD-2022-3499 No score

An issue was discovered in Symfony before 2.7.38, 2.8.31, 3.2.14, 3.3.13, 3.4-BETA5, and 4.0-BETA5. The Intl component includes various bundle readers that are used to read resource bundles from the local filesystem. The read() methods of these classes use a path and a locale to determine the language bundle to retrieve. The locale argument value is commonly retrieved from untrusted user input (like a URL parameter). An attacker can use this argument to navigate to arbitrary directories via the dot-dot-slash attack, aka Directory Traversal.

Record
EUVD-2022-3499
Updated
2026-11-03
GitHub AdvisoriesGHSA-c49r-8gj6-768r 7.5

Symfony Directory Traversal

An issue was discovered in Symfony before 2.7.38, 2.8.31, 3.2.14, 3.3.13, 3.4-BETA5, and 4.0-BETA5. The Intl component includes various bundle readers that are used to read resource bundles from the local filesystem. The read() methods of these classes use a path and a locale to determine the language bundle to retrieve. The locale argument value is commonly retrieved from untrusted user input (like a URL parameter). An attacker can use this argument to navigate to arbitrary directories via the dot-dot-slash attack, aka Directory Traversal.

Record
GHSA-c49r-8gj6-768r
CVSS 3.0
7.5 HighCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Weakness
CWE-22
Updated
2026-11-02
OSV 7.5

An issue was discovered in Symfony before 2.7.38, 2.8.31, 3.2.14, 3.3.13, 3.4-BETA5, and 4.0-BETA5. The Intl component includes various bundle readers that are used to read resource bundles from the local filesystem. The read() methods of these classes use a path and a locale to determine the language bundle to retrieve. The locale argument value is commonly retrieved from untrusted user input (like a URL parameter). An attacker can use this argument to navigate to arbitrary directories via the dot-dot-slash attack, aka Directory Traversal.

Record
CVE-2017-16654
CVSS 3.0
7.5 HighCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Updated
2026-11-02
OSVDEBIAN-CVE-2017-16654 7.5

An issue was discovered in Symfony before 2.7.38, 2.8.31, 3.2.14, 3.3.13, 3.4-BETA5, and 4.0-BETA5. The Intl component includes various bundle readers that are used to read resource bundles from the local filesystem. The read() methods of these classes use a path and a locale to determine the language bundle to retrieve. The locale argument value is commonly retrieved from untrusted user input (like a URL parameter). An attacker can use this argument to navigate to arbitrary directories via the dot-dot-slash attack, aka Directory Traversal.

Record
DEBIAN-CVE-2017-16654
CVSS 3.0
7.5 HighCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Updated
2026-11-02
OSVGHSA-c49r-8gj6-768r 7.5

Symfony Directory Traversal

An issue was discovered in Symfony before 2.7.38, 2.8.31, 3.2.14, 3.3.13, 3.4-BETA5, and 4.0-BETA5. The Intl component includes various bundle readers that are used to read resource bundles from the local filesystem. The read() methods of these classes use a path and a locale to determine the language bundle to retrieve. The locale argument value is commonly retrieved from untrusted user input (like a URL parameter). An attacker can use this argument to navigate to arbitrary directories via the dot-dot-slash attack, aka Directory Traversal.

Record
GHSA-c49r-8gj6-768r
CVSS 3.0
7.5 HighCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Weakness
CWE-22
Updated
2026-11-02
OSVUBUNTU-CVE-2017-16654 7.5

An issue was discovered in Symfony before 2.7.38, 2.8.31, 3.2.14, 3.3.13, 3.4-BETA5, and 4.0-BETA5. The Intl component includes various bundle readers that are used to read resource bundles from the local filesystem. The read() methods of these classes use a path and a locale to determine the language bundle to retrieve. The locale argument value is commonly retrieved from untrusted user input (like a URL parameter). An attacker can use this argument to navigate to arbitrary directories via the dot-dot-slash attack, aka Directory Traversal.

Record
UBUNTU-CVE-2017-16654
CVSS 3.0
7.5 HighCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Updated
2026-11-02

Affected products

Affected packages

Affected packages
PackageAffectedFixed
symfony/intl
Packagist
2.7.0 up to 2.7.38
2.7.38
symfony/intl
Packagist
2.8.0 up to 2.8.31
2.8.31
symfony/intl
Packagist
3.0.0 up to 3.2.14
3.2.14
symfony/intl
Packagist
3.3.0 up to 3.3.13
3.3.13
symfony/symfony
Packagist
2.7.0 up to 2.7.38
2.7.38
symfony/symfony
Packagist
2.8.0 up to 2.8.31
2.8.31
symfony/symfony
Packagist
3.0.0 up to 3.2.14
3.2.14
symfony/symfony
Packagist
3.3.0 up to 3.3.13
3.3.13
symfony
Debian:12
before 3.4.0+dfsg-1
3.4.0+dfsg-1
symfony
Debian:13
before 3.4.0+dfsg-1
3.4.0+dfsg-1
Show 12 moreShow less
Affected packages
PackageAffectedFixed
symfony
Debian:14
before 3.4.0+dfsg-1
3.4.0+dfsg-1
symfony
Debian:8
From an advisory covering 7 CVEs
before 2.3.21+dfsg-4+deb8u4, plus listed versions
2.3.21+dfsg-42.3.21+dfsg-4+deb8u12.3.21+dfsg-4+deb8u22.3.21+dfsg-4+deb8u3
2.3.21+dfsg-4+deb8u4
symfony
Debian:9
From an advisory covering 8 CVEs
before 2.8.7+dfsg-1.3+deb9u1, plus listed versions
2.8.7+dfsg-1.3
2.8.7+dfsg-1.3+deb9u1
symfony/intl
Packagist
2.7.0 up to 2.7.38, plus listed versions
v2.7.0v2.7.1v2.7.10v2.7.11v2.7.12
Show 33 moreShow less
v2.7.13v2.7.14v2.7.15v2.7.16v2.7.17v2.7.18v2.7.19v2.7.2v2.7.20v2.7.21v2.7.22v2.7.23v2.7.24v2.7.25v2.7.26v2.7.27v2.7.28v2.7.29v2.7.3v2.7.30v2.7.31v2.7.32v2.7.33v2.7.34v2.7.35v2.7.36v2.7.37v2.7.4v2.7.5v2.7.6v2.7.7v2.7.8v2.7.9
2.7.38
symfony/intl
Packagist
2.8.0 up to 2.8.31, plus listed versions
v2.8.0v2.8.1v2.8.10v2.8.11v2.8.12
Show 26 moreShow less
v2.8.13v2.8.14v2.8.15v2.8.16v2.8.17v2.8.18v2.8.19v2.8.2v2.8.20v2.8.21v2.8.22v2.8.23v2.8.24v2.8.25v2.8.26v2.8.27v2.8.28v2.8.29v2.8.3v2.8.30v2.8.4v2.8.5v2.8.6v2.8.7v2.8.8v2.8.9
2.8.31
symfony/intl
Packagist
3.0.0 up to 3.2.14, plus listed versions
v3.0.0v3.0.1v3.0.2v3.0.3v3.0.4
Show 35 moreShow less
v3.0.5v3.0.6v3.0.7v3.0.8v3.0.9v3.1.0v3.1.0-BETA1v3.1.0-RC1v3.1.1v3.1.10v3.1.2v3.1.3v3.1.4v3.1.5v3.1.6v3.1.7v3.1.8v3.1.9v3.2.0v3.2.0-BETA1v3.2.0-RC1v3.2.0-RC2v3.2.1v3.2.10v3.2.11v3.2.12v3.2.13v3.2.2v3.2.3v3.2.4v3.2.5v3.2.6v3.2.7v3.2.8v3.2.9
3.2.14
symfony/intl
Packagist
3.3.0 up to 3.3.13, plus listed versions
v3.3.0v3.3.1v3.3.10v3.3.11v3.3.12
Show 8 moreShow less
v3.3.2v3.3.3v3.3.4v3.3.5v3.3.6v3.3.7v3.3.8v3.3.9
3.3.13
symfony/symfony
Packagist
2.7.0 up to 2.7.38, plus listed versions
v2.7.0v2.7.1v2.7.10v2.7.11v2.7.12
Show 33 moreShow less
v2.7.13v2.7.14v2.7.15v2.7.16v2.7.17v2.7.18v2.7.19v2.7.2v2.7.20v2.7.21v2.7.22v2.7.23v2.7.24v2.7.25v2.7.26v2.7.27v2.7.28v2.7.29v2.7.3v2.7.30v2.7.31v2.7.32v2.7.33v2.7.34v2.7.35v2.7.36v2.7.37v2.7.4v2.7.5v2.7.6v2.7.7v2.7.8v2.7.9
2.7.38
symfony/symfony
Packagist
2.8.0 up to 2.8.31, plus listed versions
v2.8.0v2.8.1v2.8.10v2.8.11v2.8.12
Show 26 moreShow less
v2.8.13v2.8.14v2.8.15v2.8.16v2.8.17v2.8.18v2.8.19v2.8.2v2.8.20v2.8.21v2.8.22v2.8.23v2.8.24v2.8.25v2.8.26v2.8.27v2.8.28v2.8.29v2.8.3v2.8.30v2.8.4v2.8.5v2.8.6v2.8.7v2.8.8v2.8.9
2.8.31
symfony/symfony
Packagist
3.0.0 up to 3.2.14, plus listed versions
v3.0.0v3.0.1v3.0.2v3.0.3v3.0.4
Show 35 moreShow less
v3.0.5v3.0.6v3.0.7v3.0.8v3.0.9v3.1.0v3.1.0-BETA1v3.1.0-RC1v3.1.1v3.1.10v3.1.2v3.1.3v3.1.4v3.1.5v3.1.6v3.1.7v3.1.8v3.1.9v3.2.0v3.2.0-BETA1v3.2.0-RC1v3.2.0-RC2v3.2.1v3.2.10v3.2.11v3.2.12v3.2.13v3.2.2v3.2.3v3.2.4v3.2.5v3.2.6v3.2.7v3.2.8v3.2.9
3.2.14
symfony/symfony
Packagist
3.3.0 up to 3.3.13, plus listed versions
v3.3.0v3.3.1v3.3.10v3.3.11v3.3.12
Show 8 moreShow less
v3.3.2v3.3.3v3.3.4v3.3.5v3.3.6v3.3.7v3.3.8v3.3.9
3.3.13
symfony
Ubuntu:16.04:LTS
All versions, plus listed versions
2.7.1+dfsg-12.7.5+dfsg-12.7.9+dfsg-12.7.9+dfsg-1ubuntu22.7.10-0ubuntu2
None known

History

History
RecordedChangedSources
affected, facts
aliasesEUVD
first indexedCVE List, GitHub Advisories, NVD, OSV

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2017-16654 is a high vulnerability (CVSS 7.5) in Sensiolabs Symfony, published August 3, 2018. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 2.68%, the 85th percentile. Fixed in symfony/intl 2.7.38.

References

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