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7.5
HIGH CVSS 3.1
CVE-2022-3559
Exim Regex use after free
Description

A vulnerability was found in Exim and classified as problematic. This issue affects some unknown processing of the component Regex Handler. The manipulation leads to use after free. The name of the patch is 4e9ed49f8f12eb331b29bd5b6dc3693c520fddc2. It is recommended to apply a patch to fix this issue. The identifier VDB-211073 was assigned to this vulnerability.

INFO

Published Date :

Oct. 17, 2022, 6:15 p.m.

Last Modified :

May 23, 2025, 6:30 p.m.

Remotely Exploit :

Yes !

Source :

[email protected]
Affected Products

The following products are affected by CVE-2022-3559 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 Fedoraproject fedora
1 Exim exim
: Total Affected Vendor : 2 | Products : 2
CVSS Scores
The Common Vulnerability Scoring System is a standardized framework for assessing the severity of vulnerabilities in software and systems. We collect and displays CVSS scores from various sources for each CVE.
Score Version Severity Vector Exploitability Score Impact Score Source
CVSS 3.1 MEDIUM [email protected]
CVSS 3.1 HIGH [email protected]
Solution
This addresses a use-after-free vulnerability in Exim.
  • Update the Exim package.
  • If using Fedora, run 'yum update exim'.
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-2022-3559.

URL Resource
https://bugs.exim.org/show_bug.cgi?id=2915 Patch Vendor Advisory
https://git.exim.org/exim.git/commit/4e9ed49f8f12eb331b29bd5b6dc3693c520fddc2 Patch Vendor Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/EIH4W5R7SHTUEQFWWKB4TUO5YFZX64KV/ Mailing List Third Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/TMQ6OCKPNPBPSD37YR4FOWV2R54M2UEP/ Mailing List Third Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/WFHLZVHNNO2GWYP5EA4TZQZ5O4GVPARR/ Mailing List Third Party Advisory
https://vuldb.com/?id.211073 Third Party Advisory
https://bugs.exim.org/show_bug.cgi?id=2915 Patch Vendor Advisory
https://git.exim.org/exim.git/commit/4e9ed49f8f12eb331b29bd5b6dc3693c520fddc2 Patch Vendor Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/EIH4W5R7SHTUEQFWWKB4TUO5YFZX64KV/ Mailing List Third Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/TMQ6OCKPNPBPSD37YR4FOWV2R54M2UEP/ Mailing List Third Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/WFHLZVHNNO2GWYP5EA4TZQZ5O4GVPARR/ Mailing List Third Party Advisory
https://vuldb.com/?id.211073 Third Party Advisory
CWE - Common Weakness Enumeration

While CVE identifies specific instances of vulnerabilities, CWE categorizes the common flaws or weaknesses that can lead to vulnerabilities. CVE-2022-3559 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-2022-3559 weaknesses.

CAPEC-8: Buffer Overflow in an API Call Buffer Overflow in an API Call CAPEC-9: Buffer Overflow in Local Command-Line Utilities Buffer Overflow in Local Command-Line Utilities CAPEC-10: Buffer Overflow via Environment Variables Buffer Overflow via Environment Variables CAPEC-14: Client-side Injection-induced Buffer Overflow Client-side Injection-induced Buffer Overflow CAPEC-24: Filter Failure through Buffer Overflow Filter Failure through Buffer Overflow CAPEC-42: MIME Conversion MIME Conversion CAPEC-44: Overflow Binary Resource File Overflow Binary Resource File CAPEC-45: Buffer Overflow via Symbolic Links Buffer Overflow via Symbolic Links CAPEC-46: Overflow Variables and Tags Overflow Variables and Tags CAPEC-47: Buffer Overflow via Parameter Expansion Buffer Overflow via Parameter Expansion CAPEC-100: Overflow Buffers Overflow Buffers CAPEC-123: Buffer Manipulation Buffer Manipulation

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).

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

The following list is the news that have been mention CVE-2022-3559 vulnerability anywhere in the article.

Results are limited to the first 20 news articles due to potential performance issues.

The following table lists the changes that have been made to the CVE-2022-3559 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.

  • Reanalysis by [email protected]

    May. 23, 2025

    Action Type Old Value New Value
    Changed CPE Configuration OR *cpe:2.3:a:exim:exim:*:*:*:*:*:*:*:* versions up to (including) 4.96 OR *cpe:2.3:a:exim:exim:*:*:*:*:*:*:*:* versions up to (excluding) 4.97
  • Modified Analysis by [email protected]

    May. 23, 2025

    Action Type Old Value New Value
    Changed CPE Configuration OR *cpe:2.3:a:exim:exim:-:*:*:*:*:*:*:* OR *cpe:2.3:a:exim:exim:*:*:*:*:*:*:*:* versions up to (including) 4.96
    Added Reference Type CVE: https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/EIH4W5R7SHTUEQFWWKB4TUO5YFZX64KV/ Types: Mailing List, Third Party Advisory
    Added Reference Type VulDB: https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/EIH4W5R7SHTUEQFWWKB4TUO5YFZX64KV/ Types: Mailing List, Third Party Advisory
    Added Reference Type CVE: https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/TMQ6OCKPNPBPSD37YR4FOWV2R54M2UEP/ Types: Mailing List, Third Party Advisory
    Added Reference Type VulDB: https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/TMQ6OCKPNPBPSD37YR4FOWV2R54M2UEP/ Types: Mailing List, Third Party Advisory
    Added Reference Type CVE: https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/WFHLZVHNNO2GWYP5EA4TZQZ5O4GVPARR/ Types: Mailing List, Third Party Advisory
    Added Reference Type VulDB: https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/WFHLZVHNNO2GWYP5EA4TZQZ5O4GVPARR/ Types: Mailing List, Third Party Advisory
  • CVE Modified by af854a3a-2127-422b-91ae-364da2661108

    Nov. 21, 2024

    Action Type Old Value New Value
    Added Reference https://bugs.exim.org/show_bug.cgi?id=2915
    Added Reference https://git.exim.org/exim.git/commit/4e9ed49f8f12eb331b29bd5b6dc3693c520fddc2
    Added Reference https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/EIH4W5R7SHTUEQFWWKB4TUO5YFZX64KV/
    Added Reference https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/TMQ6OCKPNPBPSD37YR4FOWV2R54M2UEP/
    Added Reference https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/WFHLZVHNNO2GWYP5EA4TZQZ5O4GVPARR/
    Added Reference https://vuldb.com/?id.211073
  • 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 VulDB https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/WFHLZVHNNO2GWYP5EA4TZQZ5O4GVPARR/ [No types assigned]
    Added Reference VulDB https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/TMQ6OCKPNPBPSD37YR4FOWV2R54M2UEP/ [No types assigned]
    Added Reference VulDB https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/EIH4W5R7SHTUEQFWWKB4TUO5YFZX64KV/ [No types assigned]
    Removed Reference VulDB https://lists.fedoraproject.org/archives/list/[email protected]/message/WFHLZVHNNO2GWYP5EA4TZQZ5O4GVPARR/
    Removed Reference VulDB https://lists.fedoraproject.org/archives/list/[email protected]/message/TMQ6OCKPNPBPSD37YR4FOWV2R54M2UEP/
    Removed Reference VulDB https://lists.fedoraproject.org/archives/list/[email protected]/message/EIH4W5R7SHTUEQFWWKB4TUO5YFZX64KV/
    Removed CWE VulDB CWE-416
  • Modified Analysis by [email protected]

    Nov. 16, 2022

    Action Type Old Value New Value
    Changed Reference Type https://lists.fedoraproject.org/archives/list/[email protected]/message/EIH4W5R7SHTUEQFWWKB4TUO5YFZX64KV/ No Types Assigned https://lists.fedoraproject.org/archives/list/[email protected]/message/EIH4W5R7SHTUEQFWWKB4TUO5YFZX64KV/ Mailing List, Third Party Advisory
    Changed Reference Type https://lists.fedoraproject.org/archives/list/[email protected]/message/TMQ6OCKPNPBPSD37YR4FOWV2R54M2UEP/ No Types Assigned https://lists.fedoraproject.org/archives/list/[email protected]/message/TMQ6OCKPNPBPSD37YR4FOWV2R54M2UEP/ Mailing List, Third Party Advisory
    Changed Reference Type https://lists.fedoraproject.org/archives/list/[email protected]/message/WFHLZVHNNO2GWYP5EA4TZQZ5O4GVPARR/ No Types Assigned https://lists.fedoraproject.org/archives/list/[email protected]/message/WFHLZVHNNO2GWYP5EA4TZQZ5O4GVPARR/ Mailing List, Third Party Advisory
    Added CPE Configuration OR *cpe:2.3:o:fedoraproject:fedora:35:*:*:*:*:*:*:* *cpe:2.3:o:fedoraproject:fedora:36:*:*:*:*:*:*:* *cpe:2.3:o:fedoraproject:fedora:37:*:*:*:*:*:*:*
  • CVE Modified by [email protected]

    Nov. 14, 2022

    Action Type Old Value New Value
    Added Reference https://lists.fedoraproject.org/archives/list/[email protected]/message/EIH4W5R7SHTUEQFWWKB4TUO5YFZX64KV/ [No Types Assigned]
  • CVE Modified by [email protected]

    Oct. 28, 2022

    Action Type Old Value New Value
    Added Reference https://lists.fedoraproject.org/archives/list/[email protected]/message/TMQ6OCKPNPBPSD37YR4FOWV2R54M2UEP/ [No Types Assigned]
  • CVE Modified by [email protected]

    Oct. 28, 2022

    Action Type Old Value New Value
    Added Reference https://lists.fedoraproject.org/archives/list/[email protected]/message/WFHLZVHNNO2GWYP5EA4TZQZ5O4GVPARR/ [No Types Assigned]
  • Initial Analysis by [email protected]

    Oct. 20, 2022

    Action Type Old Value New Value
    Added CVSS V3.1 NIST AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
    Changed Reference Type https://bugs.exim.org/show_bug.cgi?id=2915 No Types Assigned https://bugs.exim.org/show_bug.cgi?id=2915 Patch, Vendor Advisory
    Changed Reference Type https://git.exim.org/exim.git/commit/4e9ed49f8f12eb331b29bd5b6dc3693c520fddc2 No Types Assigned https://git.exim.org/exim.git/commit/4e9ed49f8f12eb331b29bd5b6dc3693c520fddc2 Patch, Vendor Advisory
    Changed Reference Type https://vuldb.com/?id.211073 No Types Assigned https://vuldb.com/?id.211073 Third Party Advisory
    Added CWE NIST CWE-416
    Added CPE Configuration OR *cpe:2.3:a:exim:exim:-:*:*:*:*:*:*:*
  • CVE Modified by [email protected]

    Oct. 19, 2022

    Action Type Old Value New Value
    Changed Description A vulnerability was found in Exim and classified as critical. This issue affects some unknown processing of the component Regex Handler. The manipulation leads to use after free. The name of the patch is 4e9ed49f8f12eb331b29bd5b6dc3693c520fddc2. It is recommended to apply a patch to fix this issue. The identifier VDB-211073 was assigned to this vulnerability. A vulnerability was found in Exim and classified as problematic. This issue affects some unknown processing of the component Regex Handler. The manipulation leads to use after free. The name of the patch is 4e9ed49f8f12eb331b29bd5b6dc3693c520fddc2. It is recommended to apply a patch to fix this issue. The identifier VDB-211073 was assigned to this vulnerability.
    Removed CVSS V3.1 VulDB AV:A/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L
    Added CVSS V3.1 VulDB AV:A/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:L
    Added Reference https://bugs.exim.org/show_bug.cgi?id=2915 [No Types Assigned]
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.
Vulnerability Scoring Details
Base CVSS Score: 7.5
Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality Impact
Integrity Impact
Availability Impact
Exploit Prediction

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

0.22 }} -0.02%

score

0.44550

percentile