CVE-2015-7529: Sosreport SoSReport Predictable Tmp File Names Vulnerability

HIGH
Advisory Identifier: GHSA-3g56-2hh3-35ph
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CVSS 7.8
CWE-59
Published
Advisory Summary

CVE-2015-7529 is a HIGH (CVSS 7.8) sosreport predictable tmp file names vulnerability (CWE-59: Improper Link Resolution Before File Access ('Link Following')) affecting Sosreport libraries in the PyPI ecosystem. The issue involves sosreport predictable tmp file names. Remediation is available by upgrading affected packages to version 3.3.

CVE-2015-7529 at a Glance

CVE Identifier CVE-2015-7529
GHSA Identifier GHSA-3g56-2hh3-35ph
Severity HIGH
CVSS v3.1 Base Score 7.8
CWE Classification CWE-59: Improper Link Resolution Before File Access ('Link Following')
Affected Product Sosreport
Package Ecosystem PyPI
Published Date
Last Updated

Security Impact

CVSS: 7.8

The security impact metrics below are parsed directly from the CVSS v3.1 vector string (CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H).

Attack Vector Local (AV:L)
Attack Complexity Low (AC:L)
Privileges Required Low (PR:L)
User Interaction None (UI:N)
Scope Unchanged (S:U)
Confidentiality High (C:H)
Integrity High (I:H)
Availability High (A:H)

How to Fix CVE-2015-7529

To remediate this vulnerability, upgrade all affected Sosreport dependencies to a patched release. Both direct and transitive dependencies should be checked, as frameworks or security libraries may pull in vulnerable versions transitively.

sosreport fixed: 3.3 
pip install sosreport>=3.3
Verify Direct and Transitive Dependencies

Run the following command in your project directory to verify that all resolved dependencies use the patched release: 

pip show sosreport

How to Check if You Are Affected

To determine whether your Python environment is affected by CVE-2015-7529, inspect your installed packages using pip:

pip show sosreport

Analyze the terminal output to locate any version of Sosreport in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 3.3), your application is affected.

Note: The pip show sosreport command checks currently installed packages in your active Python environment.

Technical Details

Vulnerability Mechanism & Technical Analysis

This vulnerability is classified under CWE-59: Improper Link Resolution Before File Access ('Link Following'), where 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. In Sosreport, software state validation or input boundaries are circumvented during processing. Review the official source advisory statement below for specific affected components, classes, and reproduction details.

Source Advisory Statement

sosreport in SoS 3.x allows local users to obtain sensitive information from sosreport files or gain privileges via a symlink attack on an archive file in a temporary directory, as demonstrated by `sosreport-$hostname-$date.tar` in `/tmp/sosreport-$hostname-$date`.

CVE-2015-7529 Affected Sosreport Versions

1 component(s)
Fixed Versions:
3.3
Product / Package Ecosystem Affected Versions Fixed Version
sosreport
pypi/sosreport
PyPI
≥ 3.0
< 3.3
3.3

References

NVD — CVE-2015-7529 NVD
https://nvd.nist.gov/vuln/detail/CVE-2015-7529
Sosreport Source Repository REPOSITORY
https://github.com/sosreport/sos/issues/696
access.redhat.com/errata/rhsa-2016:01... WEB
https://access.redhat.com/errata/RHSA-2016:0152
access.redhat.com/errata/rhsa-2016:01... WEB
https://access.redhat.com/errata/RHSA-2016:0188
Sosreport Security Information SECURITY
https://access.redhat.com/security/cve/CVE-2015-7529
bugzilla.redhat.com/show_bug.cgi WEB
https://bugzilla.redhat.com/show_bug.cgi?id=1282542
Sosreport Source Repository REPOSITORY
https://github.com/pypa/advisory-database/tree/main/vulns/sosreport/PYSEC-2017-73.yaml
Sosreport Source Repository REPOSITORY
https://github.com/sosreport/sos
Sosreport Security Information SECURITY
https://web.archive.org/web/20160416033632/http://www.securityfocus.com/bid/83162
rhn.redhat.com/errata/rhsa-2016-01... WEB
http://rhn.redhat.com/errata/RHSA-2016-0152.html
rhn.redhat.com/errata/rhsa-2016-01... WEB
http://rhn.redhat.com/errata/RHSA-2016-0188.html
www.ubuntu.com/usn/usn-2845-1 WEB
http://www.ubuntu.com/usn/USN-2845-1

Frequently Asked Questions

What is CVE-2015-7529?
CVE-2015-7529 is a security vulnerability in Sosreport involving SoSReport Predictable Tmp File Names under CWE-59: Improper Link Resolution Before File Access ('Link Following').
Which Sosreport versions are affected?
Affected versions include releases prior to 3.3 across affected packages: sosreport.
What version fixes CVE-2015-7529?
Upgrading to 3.3 (or the latest patched release for your respective branch) resolves the vulnerability.
Is sosreport affected?
Yes, sosreport is affected in releases prior to 3.3. Upgrade your dependency to 3.3 or later.
What is the CVSS score of CVE-2015-7529?
CVE-2015-7529 has a CVSS v3.1 base score of 7.8 (HIGH) with vector string CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.
What CWE is associated with CVE-2015-7529?
CVE-2015-7529 is classified under CWE-59: Improper Link Resolution Before File Access ('Link Following') (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.).
How can I check PyPI dependencies for CVE-2015-7529?
Run the dependency tree command: 'pip show sosreport'. This command lists direct and transitive dependencies in your build configuration so you can verify if a vulnerable version is resolved.
Machine-readable OSV JSON OSV v1.5 Schema
Normalized schema output
View Raw JSON 
{
  "schema_version" : "1.4.0",
  "id" : "GHSA-3g56-2hh3-35ph",
  "modified" : "2024-10-27T15:34:11Z",
  "published" : "2022-05-13T01:54:05Z",
  "aliases" : [ "CVE-2015-7529" ],
  "summary" : "SoSReport Predictable Tmp File Names",
  "details" : "sosreport in SoS 3.x allows local users to obtain sensitive information from sosreport files or gain privileges via a symlink attack on an archive file in a temporary directory, as demonstrated by `sosreport-$hostname-$date.tar` in `/tmp/sosreport-$hostname-$date`.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H"
  }, {
    "type" : "CVSS_V4",
    "score" : "CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "PyPI",
      "name" : "sosreport"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "3.0"
      }, {
        "fixed" : "3.3"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2015-7529"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/sosreport/sos/issues/696"
  }, {
    "type" : "WEB",
    "url" : "https://access.redhat.com/errata/RHSA-2016:0152"
  }, {
    "type" : "WEB",
    "url" : "https://access.redhat.com/errata/RHSA-2016:0188"
  }, {
    "type" : "WEB",
    "url" : "https://access.redhat.com/security/cve/CVE-2015-7529"
  }, {
    "type" : "WEB",
    "url" : "https://bugzilla.redhat.com/show_bug.cgi?id=1282542"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/pypa/advisory-database/tree/main/vulns/sosreport/PYSEC-2017-73.yaml"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/sosreport/sos"
  }, {
    "type" : "WEB",
    "url" : "https://web.archive.org/web/20160416033632/http://www.securityfocus.com/bid/83162"
  }, {
    "type" : "WEB",
    "url" : "http://rhn.redhat.com/errata/RHSA-2016-0152.html"
  }, {
    "type" : "WEB",
    "url" : "http://rhn.redhat.com/errata/RHSA-2016-0188.html"
  }, {
    "type" : "WEB",
    "url" : "http://www.ubuntu.com/usn/USN-2845-1"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-59" ],
    "severity" : "HIGH",
    "github_reviewed" : true,
    "github_reviewed_at" : "2023-08-02T22:03:33Z",
    "nvd_published_at" : "2017-11-06T17:29:00Z"
  }
}