Vulnerabilities
Misconfiguration
Compliance
CVE Vulnerabilities

CVE-2014-1876

Improper Link Resolution Before File Access ('Link Following')

Published: Feb 10, 2014 | Modified: Apr 11, 2025
CVSS 3.x
N/A
Source:
NVD
CVSS 2.x
4.4 MEDIUM
AV:L/AC:M/Au:N/C:P/I:P/A:P
RedHat/V2
1.9 LOW
AV:L/AC:M/Au:N/C:N/I:P/A:N
RedHat/V3
Ubuntu
MEDIUM
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Additional information
NVDhttps://nvd.nist.gov/vuln/detail/CVE-2014-1876
CWEhttps://cwe.mitre.org/data/definitions/59.html

The unpacker::redirect_stdio function in unpack.cpp in unpack200 in OpenJDK 6, 7, and 8; Oracle Java SE 5.0u61, 6u71, 7u51, and 8; JRockit R27.8.1 and R28.3.1; and Java SE Embedded 7u51 does not securely create temporary files when a log file cannot be opened, which allows local users to overwrite arbitrary files via a symlink attack on /tmp/unpack.log.

Weakness

The product attempts to access a file based on the filename, but it does not properly prevent that filename from identifying a link or shortcut that resolves to an unintended resource.

Affected Software

NameVendorStart VersionEnd Version
OpenjdkOracle1.6.0 (including)1.6.0 (including)
OpenjdkOracle1.7.0 (including)1.7.0 (including)
OpenjdkOracle1.8.0 (including)1.8.0 (including)
Oracle Java for Red Hat Enterprise Linux 5RedHatjava-1.7.0-oracle-1:1.7.0.55-1jpp.2.el5_10*
Oracle Java for Red Hat Enterprise Linux 5RedHatjava-1.6.0-sun-1:1.6.0.75-1jpp.3.el5_10*
Oracle Java for Red Hat Enterprise Linux 6RedHatjava-1.7.0-oracle-1:1.7.0.55-1jpp.1.el6_5*
Oracle Java for Red Hat Enterprise Linux 6RedHatjava-1.6.0-sun-1:1.6.0.75-1jpp.1.el6_5*
Red Hat Enterprise Linux 5RedHatjava-1.7.0-openjdk-1:1.7.0.55-2.4.7.1.el5_10*
Red Hat Enterprise Linux 5RedHatjava-1.6.0-openjdk-1:1.6.0.0-5.1.13.3.el5_10*
Red Hat Enterprise Linux 6RedHatjava-1.7.0-openjdk-1:1.7.0.55-2.4.7.1.el6_5*
Red Hat Enterprise Linux 6RedHatjava-1.6.0-openjdk-1:1.6.0.0-5.1.13.3.el6_5*
Red Hat Enterprise Linux 7RedHatjava-1.7.0-openjdk-1:1.7.0.55-2.4.7.2.el7_0*
Red Hat Enterprise Linux 7RedHatjava-1.6.0-openjdk-1:1.6.0.0-6.1.13.3.el7_0*
Red Hat Network Satellite Server v 5.4RedHatjava-1.6.0-ibm-1:1.6.0.16.0-1jpp.1.el6*
Red Hat Network Satellite Server v 5.5RedHatjava-1.6.0-ibm-1:1.6.0.16.0-1jpp.1.el6*
Red Hat Satellite 5.6RedHatjava-1.6.0-ibm-1:1.6.0.16.0-1jpp.1.el6*
Supplementary for Red Hat Enterprise Linux 5RedHatjava-1.7.0-oracle-1:1.7.0.55-1jpp.2.el5_10*
Supplementary for Red Hat Enterprise Linux 5RedHatjava-1.7.0-ibm-1:1.7.0.7.0-1jpp.1.el5_10*
Supplementary for Red Hat Enterprise Linux 5RedHatjava-1.6.0-ibm-1:1.6.0.16.0-1jpp.1.el5_10*
Supplementary for Red Hat Enterprise Linux 5RedHatjava-1.5.0-ibm-1:1.5.0.16.6-1jpp.1.el5_10*
Supplementary for Red Hat Enterprise Linux 6RedHatjava-1.7.0-oracle-1:1.7.0.55-1jpp.1.el6_5*
Supplementary for Red Hat Enterprise Linux 6RedHatjava-1.7.0-ibm-1:1.7.0.7.0-1jpp.1.el6_5*
Supplementary for Red Hat Enterprise Linux 6RedHatjava-1.6.0-ibm-1:1.6.0.16.0-1jpp.1.el6_5*
Supplementary for Red Hat Enterprise Linux 6RedHatjava-1.5.0-ibm-1:1.5.0.16.6-1jpp.1.el6_5*
Supplementary for Red Hat Enterprise Linux 7RedHatjava-1.7.1-ibm-1:1.7.1.1.0-1jpp.2.el7_0*
Openjdk-6Ubuntulucid*
Openjdk-6Ubuntuprecise*
Openjdk-6Ubuntuquantal*
Openjdk-6Ubuntusaucy*
Openjdk-7Ubuntudevel*
Openjdk-7Ubuntuprecise*
Openjdk-7Ubuntuquantal*
Openjdk-7Ubuntusaucy*
Openjdk-7Ubuntutrusty*

Potential Mitigations

  • Follow the principle of least privilege when assigning access rights to entities in a software system.
  • Denying access to a file can prevent an attacker from replacing that file with a link to a sensitive file. Ensure good compartmentalization in the system to provide protected areas that can be trusted.

References

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