Vulnerability-Lookup

alsa-2021:4593

Vulnerability from osv_almalinux

Published

2021-11-10 08:39

Modified

2021-11-12 16:17

Summary

Moderate: annobin security update

Details

Annobin provides a compiler plugin to annotate and tools to examine compiled binary files.

Security Fix(es):

Developer environment: Unicode's bidirectional (BiDi) override characters can cause trojan source attacks (CVE-2021-42574)

The following changes were introduced in annobin in order to facilitate detection of BiDi Unicode characters:

This update of annobin adds a new annocheck test to detect the presence of multibyte characters in symbol names.

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

JSON

To clipboard

{
  "affected": [
    {
      "package": {
        "ecosystem": "AlmaLinux:8",
        "name": "annobin"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "9.72-1.el8_5.2"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "AlmaLinux:8",
        "name": "annobin-annocheck"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "9.72-1.el8_5.2"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "details": "Annobin provides a compiler plugin to annotate and tools to examine compiled binary files.\n\nSecurity Fix(es):\n\n* Developer environment: Unicode\u0027s bidirectional (BiDi) override characters can cause trojan source attacks (CVE-2021-42574)\n\nThe following changes were introduced in annobin in order to facilitate detection of BiDi Unicode characters:\n\nThis update of annobin adds a new annocheck test to detect the presence of multibyte characters in symbol names.\n\nFor more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.",
  "id": "ALSA-2021:4593",
  "modified": "2021-11-12T16:17:39Z",
  "published": "2021-11-10T08:39:41Z",
  "references": [
    {
      "type": "REPORT",
      "url": "https://vulners.com/cve/CVE-2021-42574"
    }
  ],
  "related": [
    "CVE-2021-42574"
  ],
  "summary": "Moderate: annobin security update"
}

CVE-2021-42574 (GCVE-0-2021-42574)

Vulnerability from cvelistv5 – Published: 2021-11-01 00:00 – Updated: 2024-08-04 03:38 Disputed

Summary

An issue was discovered in the Bidirectional Algorithm in the Unicode Specification through 14.0. It permits the visual reordering of characters via control sequences, which can be used to craft source code that renders different logic than the logical ordering of tokens ingested by compilers and interpreters. Adversaries can leverage this to encode source code for compilers accepting Unicode such that targeted vulnerabilities are introduced invisibly to human reviewers. NOTE: the Unicode Consortium offers the following alternative approach to presenting this concern. An issue is noted in the nature of international text that can affect applications that implement support for The Unicode Standard and the Unicode Bidirectional Algorithm (all versions). Due to text display behavior when text includes left-to-right and right-to-left characters, the visual order of tokens may be different from their logical order. Additionally, control characters needed to fully support the requirements of bidirectional text can further obfuscate the logical order of tokens. Unless mitigated, an adversary could craft source code such that the ordering of tokens perceived by human reviewers does not match what will be processed by a compiler/interpreter/etc. The Unicode Consortium has documented this class of vulnerability in its document, Unicode Technical Report #36, Unicode Security Considerations. The Unicode Consortium also provides guidance on mitigations for this class of issues in Unicode Technical Standard #39, Unicode Security Mechanisms, and in Unicode Standard Annex #31, Unicode Identifier and Pattern Syntax. Also, the BIDI specification allows applications to tailor the implementation in ways that can mitigate misleading visual reordering in program text; see HL4 in Unicode Standard Annex #9, Unicode Bidirectional Algorithm.

Severity ?

No CVSS data available.

CWE

Assigner

mitre

References

URL

Tags

	http://www.unicode.org/versions/Unicode14.0.0/
	https://trojansource.codes
	http://www.openwall.com/lists/oss-security/2021/11/01/1	mailing-list
	http://www.openwall.com/lists/oss-security/2021/11/01/4	mailing-list
	http://www.openwall.com/lists/oss-security/2021/11/01/6	mailing-list
	http://www.openwall.com/lists/oss-security/2021/11/01/5	mailing-list
	http://www.openwall.com/lists/oss-security/2021/1…	mailing-list
	https://lists.fedoraproject.org/archives/list/pac…	vendor-advisory
	https://lists.fedoraproject.org/archives/list/pac…	vendor-advisory
	https://www.kb.cert.org/vuls/id/999008	third-party-advisory
	https://lists.fedoraproject.org/archives/list/pac…	vendor-advisory
	https://www.scyon.nl/post/trojans-in-your-source-code
	https://www.unicode.org/reports/tr36/
	https://www.unicode.org/reports/tr39/
	https://www.unicode.org/reports/tr31/
	https://www.unicode.org/reports/tr9/tr9-44.html#HL4
	https://www.starwindsoftware.com/security/sw-2022…
	https://security.gentoo.org/glsa/202210-09	vendor-advisory

Show details on NVD website

JSON

To clipboard

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                "role": "CISA Coordinator",
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Sightings

Author	Source	Type	Date

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

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