CVE-2022-0778: Openssl src Openssl-src's Infinite Loop Vulnerability

HIGH
Advisory Identifier: GHSA-x3mh-jvjw-3xwx
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CVSS 7.5
CWE-835
Published
Advisory Summary

CVE-2022-0778 is a HIGH (CVSS 7.5) openssl-src's infinite loop vulnerability (CWE-835: Loop with Unreachable Exit Condition ('Infinite Loop')) affecting Openssl src libraries in the crates.io ecosystem. The issue involves openssl-src's infinite loop in `bn_mod_sqrt()` reachable when parsing certificates. Remediation is available by upgrading affected packages to version 300.0.5, 111.18.0.

CVE-2022-0778 at a Glance

CVE Identifier CVE-2022-0778
GHSA Identifier GHSA-x3mh-jvjw-3xwx
Severity HIGH
CVSS v3.1 Base Score 7.5
CWE Classification CWE-835: Loop with Unreachable Exit Condition ('Infinite Loop')
Affected Product Openssl src
Package Ecosystem crates.io
Published Date
Last Updated

Security Impact

CVSS: 7.5

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

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

How to Fix CVE-2022-0778

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

openssl-src fixed: 300.0.5 
Upgrade openssl-src to 300.0.5
openssl-src fixed: 111.18.0 
Upgrade openssl-src to 111.18.0
Verify Direct and Transitive Dependencies

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

inspect dependencies for openssl-src

How to Check if You Are Affected

To determine whether your application is affected by CVE-2022-0778, inspect your project dependencies for Openssl src:

inspect dependencies for openssl-src

Analyze the terminal output to locate any version of Openssl src in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 300.0.5), your application is affected.

Note: Verify declared build manifests and deployed runtime container environments.

Technical Details

Vulnerability Mechanism & Technical Analysis

This vulnerability is classified under CWE-835: Loop with Unreachable Exit Condition ('Infinite Loop'), where the product contains an iteration or loop with an exit condition that cannot be reached, i.e., an infinite loop. In Openssl src, 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

The BN_mod_sqrt() function, which computes a modular square root, contains a bug that can cause it to loop forever for non-prime moduli. Internally this function is used when parsing certificates that contain elliptic curve public keys in compressed form or explicit elliptic curve parameters with a base point encoded in compressed form. It is possible to trigger the infinite loop by crafting a certificate that has invalid explicit curve parameters. Since certificate parsing happens prior to verification of the certificate signature, any process that parses an externally supplied certificate may thus be subject to a denial of service attack. The infinite loop can also be reached when parsing crafted private keys as they can contain explicit elliptic curve parameters. Thus vulnerable situations include: - TLS clients consuming server certificates - TLS servers consuming client certificates - Hosting providers taking certificates or private keys from customers - Certificate authorities parsing certification requests from subscribers - Anything else which parses ASN.1 elliptic curve parameters Also any other applications that use the BN_mod_sqrt() where the attacker can control the parameter values are vulnerable to this DoS issue. In the OpenSSL 1.0.2 version the public key is not parsed during initial parsing of the certificate which makes it slightly harder to trigger the infinite loop. However any operation which requires the public key from the certificate will trigger the infinite loop. In particular the attacker can use a self-signed certificate to trigger the loop during verification of the certificate signature. This issue affects OpenSSL versions 1.0.2, 1.1.1 and 3.0. It was addressed in the releases of 1.1.1n and 3.0.2 on the 15th March 2022. Fixed in OpenSSL 3.0.2 (Affected 3.0.0,3.0.1). Fixed in OpenSSL 1.1.1n (Affected 1.1.1-1.1.1m). Fixed in OpenSSL 1.0.2zd (Affected 1.0.2-1.0.2zc).

CVE-2022-0778 Affected Openssl src Versions

2 component(s)
Fixed Versions:
300.0.5111.18.0
Product / Package Ecosystem Affected Versions Fixed Version
openssl-src
 crates.io
≥ 300.0.0
< 300.0.5
300.0.5
openssl-src
 crates.io
< 111.18.0
111.18.0

References

NVD — CVE-2022-0778 NVD
https://nvd.nist.gov/vuln/detail/CVE-2022-0778
rustsec.org/advisories/rustsec-... WEB
https://rustsec.org/advisories/RUSTSEC-2022-0014.html
Openssl src Security Information SECURITY
https://security.gentoo.org/glsa/202210-02
Openssl src Security Information SECURITY
https://security.netapp.com/advisory/ntap-20220321-0002
Openssl src Security Information SECURITY
https://security.netapp.com/advisory/ntap-20220429-0005
Openssl src Security Information SECURITY
https://security.netapp.com/advisory/ntap-20240621-0006
support.apple.com/kb/ht213255 WEB
https://support.apple.com/kb/HT213255
support.apple.com/kb/ht213256 WEB
https://support.apple.com/kb/HT213256
support.apple.com/kb/ht213257 WEB
https://support.apple.com/kb/HT213257
Openssl src Security Information SECURITY
https://www.debian.org/security/2022/dsa-5103
www.openssl.org/news/secadv/2022031... WEB
https://www.openssl.org/news/secadv/20220315.txt
Openssl src Security Information SECURITY
https://www.oracle.com/security-alerts/cpuapr2022.html
Openssl src Security Information SECURITY
https://www.oracle.com/security-alerts/cpujul2022.html
Openssl src Security Information SECURITY
https://www.tenable.com/security/tns-2022-06
Openssl src Security Information SECURITY
https://www.tenable.com/security/tns-2022-07
Openssl src Security Information SECURITY
https://www.tenable.com/security/tns-2022-08
Openssl src Security Information SECURITY
https://www.tenable.com/security/tns-2022-09
psirt.global.sonicwall.com/vuln-detail/snwlid-... WEB
https://psirt.global.sonicwall.com/vuln-detail/SNWLID-2022-0002
lists.fedoraproject.org/archives/list/packa... WEB
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/W6K3PR542DXWLEFFMFIDMME4CWMHJRMG
lists.fedoraproject.org/archives/list/packa... WEB
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/GDB3GQVJPXJE7X5C5JN6JAA4XUDWD6E6
lists.fedoraproject.org/archives/list/packa... WEB
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/323SNN6ZX7PRJJWP2BUAFLPUAE42XWLZ
lists.fedoraproject.org/archives/list/packa... WEB
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/W6K3PR542DXWLEFFMFIDMME4CWMHJRMG
lists.fedoraproject.org/archives/list/packa... WEB
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/GDB3GQVJPXJE7X5C5JN6JAA4XUDWD6E6
lists.fedoraproject.org/archives/list/packa... WEB
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/323SNN6ZX7PRJJWP2BUAFLPUAE42XWLZ
lists.debian.org/debian-lts-announce... WEB
https://lists.debian.org/debian-lts-announce/2022/03/msg00024.html
lists.debian.org/debian-lts-announce... WEB
https://lists.debian.org/debian-lts-announce/2022/03/msg00023.html
git.openssl.org/gitweb/ WEB
https://git.openssl.org/gitweb/?p=openssl.git;a=commitdiff;h=a466912611aa6cbdf550cd10601390e587451246
git.openssl.org/gitweb/ WEB
https://git.openssl.org/gitweb/?p=openssl.git;a=commitdiff;h=380085481c64de749a6dd25cdf0bcf4360b30f83
git.openssl.org/gitweb/ WEB
https://git.openssl.org/gitweb/?p=openssl.git;a=commitdiff;h=3118eb64934499d93db3230748a452351d1d9a65
git.openssl.org/gitweb/ WEB
https://git.openssl.org/gitweb/?p=openssl.git%3Ba=commitdiff%3Bh=a466912611aa6cbdf550cd10601390e587451246
git.openssl.org/gitweb/ WEB
https://git.openssl.org/gitweb/?p=openssl.git%3Ba=commitdiff%3Bh=380085481c64de749a6dd25cdf0bcf4360b30f83
git.openssl.org/gitweb/ WEB
https://git.openssl.org/gitweb/?p=openssl.git%3Ba=commitdiff%3Bh=3118eb64934499d93db3230748a452351d1d9a65
cert-portal.siemens.com/productcert/pdf/ssa... WEB
https://cert-portal.siemens.com/productcert/pdf/ssa-712929.pdf
Openssl src Security Information SECURITY
http://packetstormsecurity.com/files/167344/OpenSSL-1.0.2-1.1.1-3.0-BN_mod_sqrt-Infinite-Loop.html
seclists.org/fulldisclosure/2022... WEB
http://seclists.org/fulldisclosure/2022/May/33
seclists.org/fulldisclosure/2022... WEB
http://seclists.org/fulldisclosure/2022/May/35
seclists.org/fulldisclosure/2022... WEB
http://seclists.org/fulldisclosure/2022/May/38

Frequently Asked Questions

What is CVE-2022-0778?
CVE-2022-0778 is a security vulnerability in Openssl src involving openssl-src's infinite loop in `BN_mod_sqrt()` reachable when parsing certificates under CWE-835: Loop with Unreachable Exit Condition ('Infinite Loop').
Which Openssl src versions are affected?
Affected versions include releases prior to 300.0.5, 111.18.0 across affected packages: openssl-src.
What version fixes CVE-2022-0778?
Upgrading to 300.0.5, 111.18.0 (or the latest patched release for your respective branch) resolves the vulnerability.
Is openssl-src affected?
Yes, openssl-src is affected in releases prior to 300.0.5, 111.18.0. Upgrade your dependency to 300.0.5, 111.18.0 or later.
What is the CVSS score of CVE-2022-0778?
CVE-2022-0778 has a CVSS v3.1 base score of 7.5 (HIGH) with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.
What CWE is associated with CVE-2022-0778?
CVE-2022-0778 is classified under CWE-835: Loop with Unreachable Exit Condition ('Infinite Loop') (The product contains an iteration or loop with an exit condition that cannot be reached, i.e., an infinite loop.).
How can I check crates.io dependencies for CVE-2022-0778?
Run the dependency tree command: 'inspect dependencies for openssl-src'. 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-x3mh-jvjw-3xwx",
  "modified" : "2024-06-24T21:24:17Z",
  "published" : "2022-03-16T00:00:45Z",
  "aliases" : [ "CVE-2022-0778" ],
  "summary" : "openssl-src's infinite loop in `BN_mod_sqrt()` reachable when parsing certificates",
  "details" : "The BN_mod_sqrt() function, which computes a modular square root, contains a bug that can cause it to loop forever for non-prime moduli. Internally this function is used when parsing certificates that contain elliptic curve public keys in compressed form or explicit elliptic curve parameters with a base point encoded in compressed form. It is possible to trigger the infinite loop by crafting a certificate that has invalid explicit curve parameters. Since certificate parsing happens prior to verification of the certificate signature, any process that parses an externally supplied certificate may thus be subject to a denial of service attack. The infinite loop can also be reached when parsing crafted private keys as they can contain explicit elliptic curve parameters. Thus vulnerable situations include: - TLS clients consuming server certificates - TLS servers consuming client certificates - Hosting providers taking certificates or private keys from customers - Certificate authorities parsing certification requests from subscribers - Anything else which parses ASN.1 elliptic curve parameters Also any other applications that use the BN_mod_sqrt() where the attacker can control the parameter values are vulnerable to this DoS issue. In the OpenSSL 1.0.2 version the public key is not parsed during initial parsing of the certificate which makes it slightly harder to trigger the infinite loop. However any operation which requires the public key from the certificate will trigger the infinite loop. In particular the attacker can use a self-signed certificate to trigger the loop during verification of the certificate signature. This issue affects OpenSSL versions 1.0.2, 1.1.1 and 3.0. It was addressed in the releases of 1.1.1n and 3.0.2 on the 15th March 2022. Fixed in OpenSSL 3.0.2 (Affected 3.0.0,3.0.1). Fixed in OpenSSL 1.1.1n (Affected 1.1.1-1.1.1m). Fixed in OpenSSL 1.0.2zd (Affected 1.0.2-1.0.2zc).",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"
  } ],
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      "name" : "openssl-src"
    },
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      "events" : [ {
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    "url" : "https://www.tenable.com/security/tns-2022-07"
  }, {
    "type" : "WEB",
    "url" : "https://www.tenable.com/security/tns-2022-08"
  }, {
    "type" : "WEB",
    "url" : "https://www.tenable.com/security/tns-2022-09"
  }, {
    "type" : "WEB",
    "url" : "https://psirt.global.sonicwall.com/vuln-detail/SNWLID-2022-0002"
  }, {
    "type" : "WEB",
    "url" : "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/W6K3PR542DXWLEFFMFIDMME4CWMHJRMG"
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  "database_specific" : {
    "cwe_ids" : [ "CWE-835" ],
    "severity" : "HIGH",
    "github_reviewed" : true,
    "github_reviewed_at" : "2022-05-03T20:40:34Z",
    "nvd_published_at" : "2022-03-15T17:15:00Z"
  }
}