7.1
HIGH
CVE-2021-35940
Apache Portable Runtime (APR) Out-of-Bounds Array Read Vulnerability
Description

An out-of-bounds array read in the apr_time_exp*() functions was fixed in the Apache Portable Runtime 1.6.3 release (CVE-2017-12613). The fix for this issue was not carried forward to the APR 1.7.x branch, and hence version 1.7.0 regressed compared to 1.6.3 and is vulnerable to the same issue.

INFO

Published Date :

Aug. 23, 2021, 10:15 a.m.

Last Modified :

Nov. 7, 2023, 3:36 a.m.

Source :

[email protected]

Remotely Exploitable :

No

Impact Score :

5.2

Exploitability Score :

1.8
Public PoC/Exploit Available at Github

CVE-2021-35940 has a 4 public PoC/Exploit available at Github. Go to the Public Exploits tab to see the list.

Affected Products

The following products are affected by CVE-2021-35940 vulnerability. Even if cvefeed.io is aware of the exact versions of the products that are affected, the information is not represented in the table below.

ID Vendor Product Action
1 Oracle http_server
1 Apache portable_runtime
: Total Affected Vendor : 2 | Products : 2
References to Advisories, Solutions, and Tools

Here, you will find a curated list of external links that provide in-depth information, practical solutions, and valuable tools related to CVE-2021-35940.

URL Resource
http://mail-archives.apache.org/mod_mbox/www-announce/201710.mbox/%3CCACsi251B8UaLvM-rrH9fv57-zWi0zhyF3275_jPg1a9VEVVoxw%40mail.gmail.com%3E
http://svn.apache.org/viewvc?view=revision&revision=1891198 Vendor Advisory
http://www.openwall.com/lists/oss-security/2021/08/23/1 Mailing List Third Party Advisory
https://dist.apache.org/repos/dist/release/apr/patches/apr-1.7.0-CVE-2021-35940.patch Patch Vendor Advisory
https://lists.apache.org/thread.html/r1c788464a25fbc046a72aff451bc8186386315d92a2dd0349903fa4f%40%3Cdev.tomcat.apache.org%3E
https://lists.apache.org/thread.html/r317c398ee5736e627f7887b06607e5c58b45a696d352ba8c14615f55%40%3Cdev.apr.apache.org%3E
https://lists.apache.org/thread.html/r54c755c74b9e3846cfd84039b1967d37d2870750a02d7c603983f6ed%40%3Cdev.tomcat.apache.org%3E
https://lists.apache.org/thread.html/r72479f4dcffaa8a4732d5a0e87fecc4bace4932e28fc26f7d400e2b3%40%3Cdev.tomcat.apache.org%3E
https://lists.apache.org/thread.html/r72a069753b9363c29732e59ad8f0d22a633fb6a699980407511ac961%40%3Cdev.apr.apache.org%3E
https://lists.apache.org/thread.html/r7bb4a6ed88fc48152174e664aae30ea9a8b058eb5b44cf08cb9beb4b%40%3Cdev.apr.apache.org%3E
https://lists.apache.org/thread.html/r7bb4a6ed88fc48152174e664aae30ea9a8b058eb5b44cf08cb9beb4b%40%3Cdev.httpd.apache.org%3E
https://lists.apache.org/thread.html/ra2868b53339a6af65577146ad87016368c138388b09bff9d2860f50e%40%3Cdev.apr.apache.org%3E Mailing List Vendor Advisory
https://lists.apache.org/thread.html/ra38094406cc38a05218ebd1158187feda021b0c3a1df400bbf296af8%40%3Cdev.apr.apache.org%3E
https://lists.apache.org/thread.html/rafe54755850e93de287c36540972457b2dd86332106aa7817c7c27fb%40%3Cdev.tomcat.apache.org%3E
https://lists.apache.org/thread.html/rb1f3c85f50fbd924a0051675118d1609e57957a02ece7facb723155b%40%3Cannounce.apache.org%3E
https://www.oracle.com/security-alerts/cpujul2022.html Patch Third Party Advisory

We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).

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snps-steve/Enumerate-CVSS

This script enumerates and analyze CVSS scores from Black Duck data. The script fetches information about vulnerable components in a specified project and version from the Black Duck Server's APIs and outputs relevant details.

Python

Updated: 3 months, 1 week ago
0 stars 0 fork 0 watcher
Born at : Aug. 6, 2024, 4:25 p.m. This repo has been linked 3 different CVEs too.
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stkcat/awe-base-images

None

Shell Dockerfile

Updated: 1 year, 7 months ago
0 stars 0 fork 0 watcher
Born at : April 9, 2023, 11:49 a.m. This repo has been linked 27 different CVEs too.
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a23au/awe-base-images

Base container images for DAWE DMZ Migration Project

Dockerfile Shell

Updated: 2 years, 5 months ago
0 stars 0 fork 0 watcher
Born at : May 27, 2022, 3:25 a.m. This repo has been linked 27 different CVEs too.
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n0-traces/cve_monitor

Automatic monitor github cve using Github Actions

Python

Updated: 2 months ago
1 stars 56 fork 56 watcher
Born at : April 7, 2021, 11:16 a.m. This repo has been linked 1007 different CVEs too.

Results are limited to the first 15 repositories due to potential performance issues.

The following list is the news that have been mention CVE-2021-35940 vulnerability anywhere in the article.

The following table lists the changes that have been made to the CVE-2021-35940 vulnerability over time.

Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.

  • CVE Modified by [email protected]

    May. 14, 2024

    Action Type Old Value New Value
  • CVE Modified by [email protected]

    Nov. 07, 2023

    Action Type Old Value New Value
    Added Reference Apache Software Foundation http://mail-archives.apache.org/mod_mbox/www-announce/201710.mbox/%3CCACsi251B8UaLvM-rrH9fv57-zWi0zhyF3275_jPg1a9VEVVoxw%40mail.gmail.com%3E [No types assigned]
    Added Reference Apache Software Foundation https://lists.apache.org/thread.html/rb1f3c85f50fbd924a0051675118d1609e57957a02ece7facb723155b%40%3Cannounce.apache.org%3E [No types assigned]
    Added Reference Apache Software Foundation https://lists.apache.org/thread.html/r7bb4a6ed88fc48152174e664aae30ea9a8b058eb5b44cf08cb9beb4b%40%3Cdev.apr.apache.org%3E [No types assigned]
    Added Reference Apache Software Foundation https://lists.apache.org/thread.html/r7bb4a6ed88fc48152174e664aae30ea9a8b058eb5b44cf08cb9beb4b%40%3Cdev.httpd.apache.org%3E [No types assigned]
    Added Reference Apache Software Foundation https://lists.apache.org/thread.html/r72a069753b9363c29732e59ad8f0d22a633fb6a699980407511ac961%40%3Cdev.apr.apache.org%3E [No types assigned]
    Added Reference Apache Software Foundation https://lists.apache.org/thread.html/r317c398ee5736e627f7887b06607e5c58b45a696d352ba8c14615f55%40%3Cdev.apr.apache.org%3E [No types assigned]
    Added Reference Apache Software Foundation https://lists.apache.org/thread.html/ra38094406cc38a05218ebd1158187feda021b0c3a1df400bbf296af8%40%3Cdev.apr.apache.org%3E [No types assigned]
    Added Reference Apache Software Foundation https://lists.apache.org/thread.html/r72479f4dcffaa8a4732d5a0e87fecc4bace4932e28fc26f7d400e2b3%40%3Cdev.tomcat.apache.org%3E [No types assigned]
    Added Reference Apache Software Foundation https://lists.apache.org/thread.html/r54c755c74b9e3846cfd84039b1967d37d2870750a02d7c603983f6ed%40%3Cdev.tomcat.apache.org%3E [No types assigned]
    Added Reference Apache Software Foundation https://lists.apache.org/thread.html/rafe54755850e93de287c36540972457b2dd86332106aa7817c7c27fb%40%3Cdev.tomcat.apache.org%3E [No types assigned]
    Added Reference Apache Software Foundation https://lists.apache.org/thread.html/r1c788464a25fbc046a72aff451bc8186386315d92a2dd0349903fa4f%40%3Cdev.tomcat.apache.org%3E [No types assigned]
    Removed Reference Apache Software Foundation http://mail-archives.apache.org/mod_mbox/www-announce/201710.mbox/%3CCACsi251B8UaLvM-rrH9fv57-zWi0zhyF3275_jPg1a9VEVVoxw@mail.gmail.com%3E
    Removed Reference Apache Software Foundation https://lists.apache.org/thread.html/ra2868b53339a6af65577146ad87016368c138388b09bff9d2860f50e@%3Cdev.apr.apache.org%3E
    Removed Reference Apache Software Foundation https://lists.apache.org/thread.html/rb1f3c85f50fbd924a0051675118d1609e57957a02ece7facb723155b@%3Cannounce.apache.org%3E
    Removed Reference Apache Software Foundation https://lists.apache.org/thread.html/r7bb4a6ed88fc48152174e664aae30ea9a8b058eb5b44cf08cb9beb4b@%3Cdev.httpd.apache.org%3E
    Removed Reference Apache Software Foundation https://lists.apache.org/thread.html/r7bb4a6ed88fc48152174e664aae30ea9a8b058eb5b44cf08cb9beb4b@%3Cdev.apr.apache.org%3E
    Removed Reference Apache Software Foundation https://lists.apache.org/thread.html/r72a069753b9363c29732e59ad8f0d22a633fb6a699980407511ac961@%3Cdev.apr.apache.org%3E
    Removed Reference Apache Software Foundation https://lists.apache.org/thread.html/r317c398ee5736e627f7887b06607e5c58b45a696d352ba8c14615f55@%3Cdev.apr.apache.org%3E
    Removed Reference Apache Software Foundation https://lists.apache.org/thread.html/ra38094406cc38a05218ebd1158187feda021b0c3a1df400bbf296af8@%3Cdev.apr.apache.org%3E
    Removed Reference Apache Software Foundation https://lists.apache.org/thread.html/r72479f4dcffaa8a4732d5a0e87fecc4bace4932e28fc26f7d400e2b3@%3Cdev.tomcat.apache.org%3E
    Removed Reference Apache Software Foundation https://lists.apache.org/thread.html/r54c755c74b9e3846cfd84039b1967d37d2870750a02d7c603983f6ed@%3Cdev.tomcat.apache.org%3E
    Removed Reference Apache Software Foundation https://lists.apache.org/thread.html/rafe54755850e93de287c36540972457b2dd86332106aa7817c7c27fb@%3Cdev.tomcat.apache.org%3E
    Removed Reference Apache Software Foundation https://lists.apache.org/thread.html/r1c788464a25fbc046a72aff451bc8186386315d92a2dd0349903fa4f@%3Cdev.tomcat.apache.org%3E
  • Modified Analysis by [email protected]

    Dec. 07, 2022

    Action Type Old Value New Value
    Changed Reference Type https://www.oracle.com/security-alerts/cpujul2022.html No Types Assigned https://www.oracle.com/security-alerts/cpujul2022.html Patch, Third Party Advisory
    Added CPE Configuration OR *cpe:2.3:a:oracle:http_server:12.2.1.3.0:*:*:*:*:*:*:* *cpe:2.3:a:oracle:http_server:12.2.1.4.0:*:*:*:*:*:*:*
  • CVE Modified by [email protected]

    Jul. 25, 2022

    Action Type Old Value New Value
    Added Reference https://www.oracle.com/security-alerts/cpujul2022.html [No Types Assigned]
  • Reanalysis by [email protected]

    Dec. 29, 2021

    Action Type Old Value New Value
    Changed CPE Configuration OR *cpe:2.3:a:apache:portable_runtime:*:*:*:*:*:*:*:* versions up to (excluding) 1.7.0 OR *cpe:2.3:a:apache:portable_runtime:1.7.0:*:*:*:*:*:*:*
  • Modified Analysis by [email protected]

    Oct. 18, 2021

    Action Type Old Value New Value
    Changed Reference Type https://lists.apache.org/thread.html/r1c788464a25fbc046a72aff451bc8186386315d92a2dd0349903fa4f@%3Cdev.tomcat.apache.org%3E No Types Assigned https://lists.apache.org/thread.html/r1c788464a25fbc046a72aff451bc8186386315d92a2dd0349903fa4f@%3Cdev.tomcat.apache.org%3E Mailing List, Vendor Advisory
    Changed Reference Type https://lists.apache.org/thread.html/r317c398ee5736e627f7887b06607e5c58b45a696d352ba8c14615f55@%3Cdev.apr.apache.org%3E No Types Assigned https://lists.apache.org/thread.html/r317c398ee5736e627f7887b06607e5c58b45a696d352ba8c14615f55@%3Cdev.apr.apache.org%3E Mailing List, Vendor Advisory
    Changed Reference Type https://lists.apache.org/thread.html/r54c755c74b9e3846cfd84039b1967d37d2870750a02d7c603983f6ed@%3Cdev.tomcat.apache.org%3E No Types Assigned https://lists.apache.org/thread.html/r54c755c74b9e3846cfd84039b1967d37d2870750a02d7c603983f6ed@%3Cdev.tomcat.apache.org%3E Mailing List, Vendor Advisory
    Changed Reference Type https://lists.apache.org/thread.html/r72479f4dcffaa8a4732d5a0e87fecc4bace4932e28fc26f7d400e2b3@%3Cdev.tomcat.apache.org%3E No Types Assigned https://lists.apache.org/thread.html/r72479f4dcffaa8a4732d5a0e87fecc4bace4932e28fc26f7d400e2b3@%3Cdev.tomcat.apache.org%3E Mailing List, Vendor Advisory
    Changed Reference Type https://lists.apache.org/thread.html/r72a069753b9363c29732e59ad8f0d22a633fb6a699980407511ac961@%3Cdev.apr.apache.org%3E No Types Assigned https://lists.apache.org/thread.html/r72a069753b9363c29732e59ad8f0d22a633fb6a699980407511ac961@%3Cdev.apr.apache.org%3E Mailing List, Vendor Advisory
    Changed Reference Type https://lists.apache.org/thread.html/r7bb4a6ed88fc48152174e664aae30ea9a8b058eb5b44cf08cb9beb4b@%3Cdev.apr.apache.org%3E No Types Assigned https://lists.apache.org/thread.html/r7bb4a6ed88fc48152174e664aae30ea9a8b058eb5b44cf08cb9beb4b@%3Cdev.apr.apache.org%3E Mailing List, Vendor Advisory
    Changed Reference Type https://lists.apache.org/thread.html/r7bb4a6ed88fc48152174e664aae30ea9a8b058eb5b44cf08cb9beb4b@%3Cdev.httpd.apache.org%3E No Types Assigned https://lists.apache.org/thread.html/r7bb4a6ed88fc48152174e664aae30ea9a8b058eb5b44cf08cb9beb4b@%3Cdev.httpd.apache.org%3E Mailing List, Vendor Advisory
    Changed Reference Type https://lists.apache.org/thread.html/ra38094406cc38a05218ebd1158187feda021b0c3a1df400bbf296af8@%3Cdev.apr.apache.org%3E No Types Assigned https://lists.apache.org/thread.html/ra38094406cc38a05218ebd1158187feda021b0c3a1df400bbf296af8@%3Cdev.apr.apache.org%3E Mailing List, Vendor Advisory
    Changed Reference Type https://lists.apache.org/thread.html/rafe54755850e93de287c36540972457b2dd86332106aa7817c7c27fb@%3Cdev.tomcat.apache.org%3E No Types Assigned https://lists.apache.org/thread.html/rafe54755850e93de287c36540972457b2dd86332106aa7817c7c27fb@%3Cdev.tomcat.apache.org%3E Mailing List, Vendor Advisory
  • CVE Modified by [email protected]

    Sep. 22, 2021

    Action Type Old Value New Value
    Added Reference https://lists.apache.org/thread.html/rafe54755850e93de287c36540972457b2dd86332106aa7817c7c27fb@%3Cdev.tomcat.apache.org%3E [No Types Assigned]
    Added Reference https://lists.apache.org/thread.html/r1c788464a25fbc046a72aff451bc8186386315d92a2dd0349903fa4f@%3Cdev.tomcat.apache.org%3E [No Types Assigned]
  • CVE Modified by [email protected]

    Sep. 22, 2021

    Action Type Old Value New Value
    Added Reference https://lists.apache.org/thread.html/r54c755c74b9e3846cfd84039b1967d37d2870750a02d7c603983f6ed@%3Cdev.tomcat.apache.org%3E [No Types Assigned]
  • CVE Modified by [email protected]

    Sep. 22, 2021

    Action Type Old Value New Value
    Added Reference https://lists.apache.org/thread.html/r72479f4dcffaa8a4732d5a0e87fecc4bace4932e28fc26f7d400e2b3@%3Cdev.tomcat.apache.org%3E [No Types Assigned]
  • CVE Modified by [email protected]

    Sep. 16, 2021

    Action Type Old Value New Value
    Added Reference https://lists.apache.org/thread.html/ra38094406cc38a05218ebd1158187feda021b0c3a1df400bbf296af8@%3Cdev.apr.apache.org%3E [No Types Assigned]
  • CVE Modified by [email protected]

    Sep. 01, 2021

    Action Type Old Value New Value
    Added Reference https://lists.apache.org/thread.html/r317c398ee5736e627f7887b06607e5c58b45a696d352ba8c14615f55@%3Cdev.apr.apache.org%3E [No Types Assigned]
  • CVE Modified by [email protected]

    Aug. 31, 2021

    Action Type Old Value New Value
    Added Reference https://lists.apache.org/thread.html/r7bb4a6ed88fc48152174e664aae30ea9a8b058eb5b44cf08cb9beb4b@%3Cdev.httpd.apache.org%3E [No Types Assigned]
    Added Reference https://lists.apache.org/thread.html/r7bb4a6ed88fc48152174e664aae30ea9a8b058eb5b44cf08cb9beb4b@%3Cdev.apr.apache.org%3E [No Types Assigned]
    Added Reference https://lists.apache.org/thread.html/r72a069753b9363c29732e59ad8f0d22a633fb6a699980407511ac961@%3Cdev.apr.apache.org%3E [No Types Assigned]
  • Initial Analysis by [email protected]

    Aug. 28, 2021

    Action Type Old Value New Value
    Added CVSS V2 NIST (AV:L/AC:L/Au:N/C:P/I:N/A:P)
    Added CVSS V3.1 NIST AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H
    Changed Reference Type http://mail-archives.apache.org/mod_mbox/www-announce/201710.mbox/%3CCACsi251B8UaLvM-rrH9fv57-zWi0zhyF3275_jPg1a9VEVVoxw@mail.gmail.com%3E No Types Assigned http://mail-archives.apache.org/mod_mbox/www-announce/201710.mbox/%3CCACsi251B8UaLvM-rrH9fv57-zWi0zhyF3275_jPg1a9VEVVoxw@mail.gmail.com%3E Mailing List, Vendor Advisory
    Changed Reference Type http://svn.apache.org/viewvc?view=revision&revision=1891198 No Types Assigned http://svn.apache.org/viewvc?view=revision&revision=1891198 Vendor Advisory
    Changed Reference Type http://www.openwall.com/lists/oss-security/2021/08/23/1 No Types Assigned http://www.openwall.com/lists/oss-security/2021/08/23/1 Mailing List, Third Party Advisory
    Changed Reference Type https://dist.apache.org/repos/dist/release/apr/patches/apr-1.7.0-CVE-2021-35940.patch No Types Assigned https://dist.apache.org/repos/dist/release/apr/patches/apr-1.7.0-CVE-2021-35940.patch Patch, Vendor Advisory
    Changed Reference Type https://lists.apache.org/thread.html/ra2868b53339a6af65577146ad87016368c138388b09bff9d2860f50e%40%3Cdev.apr.apache.org%3E No Types Assigned https://lists.apache.org/thread.html/ra2868b53339a6af65577146ad87016368c138388b09bff9d2860f50e%40%3Cdev.apr.apache.org%3E Mailing List, Vendor Advisory
    Changed Reference Type https://lists.apache.org/thread.html/ra2868b53339a6af65577146ad87016368c138388b09bff9d2860f50e@%3Cdev.apr.apache.org%3E No Types Assigned https://lists.apache.org/thread.html/ra2868b53339a6af65577146ad87016368c138388b09bff9d2860f50e@%3Cdev.apr.apache.org%3E Mailing List, Vendor Advisory
    Changed Reference Type https://lists.apache.org/thread.html/rb1f3c85f50fbd924a0051675118d1609e57957a02ece7facb723155b@%3Cannounce.apache.org%3E No Types Assigned https://lists.apache.org/thread.html/rb1f3c85f50fbd924a0051675118d1609e57957a02ece7facb723155b@%3Cannounce.apache.org%3E Mailing List, Patch, Vendor Advisory
    Added CWE NIST CWE-125
    Added CPE Configuration OR *cpe:2.3:a:apache:portable_runtime:*:*:*:*:*:*:*:* versions up to (excluding) 1.7.0
  • CVE Modified by [email protected]

    Aug. 23, 2021

    Action Type Old Value New Value
    Added Reference https://lists.apache.org/thread.html/rb1f3c85f50fbd924a0051675118d1609e57957a02ece7facb723155b@%3Cannounce.apache.org%3E [No Types Assigned]
  • CVE Modified by [email protected]

    Aug. 23, 2021

    Action Type Old Value New Value
    Added Reference http://www.openwall.com/lists/oss-security/2021/08/23/1 [No Types Assigned]
    Added Reference https://lists.apache.org/thread.html/ra2868b53339a6af65577146ad87016368c138388b09bff9d2860f50e@%3Cdev.apr.apache.org%3E [No Types Assigned]
  • CVE Modified by [email protected]

    Aug. 23, 2021

    Action Type Old Value New Value
    Changed Description An out-of-bounds array read in the apr_time_exp*() functions was fixed in the Apache Portable Runtime 1.6.3 release (CVE-2017-12613). The fix for this issue was not carried forward to the APR 1.7.x branch, and hence version 1.7.0 regressed compared to 1.6.3 and is vulnerable to the same issue. An out-of-bounds array read in the apr_time_exp*() functions was fixed in the Apache Portable Runtime 1.6.3 release (CVE-2017-12613). The fix for this issue was not carried forward to the APR 1.7.x branch, and hence version 1.7.0 regressed compared to 1.6.3 and is vulnerable to the same issue.
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days. Following chart shows the EPSS score history of the vulnerability.
CWE - Common Weakness Enumeration

While CVE identifies specific instances of vulnerabilities, CWE categorizes the common flaws or weaknesses that can lead to vulnerabilities. CVE-2021-35940 is associated with the following CWEs:

Common Attack Pattern Enumeration and Classification (CAPEC)

Common Attack Pattern Enumeration and Classification (CAPEC) stores attack patterns, which are descriptions of the common attributes and approaches employed by adversaries to exploit the CVE-2021-35940 weaknesses.

Exploit Prediction

EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days.

0.08 }} 0.02%

score

0.33185

percentile

CVSS31 - Vulnerability Scoring System
Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality
Integrity
Availability
: