CVE-2012-6085

GnuPG: read_block() corrupt key input validation

Severity Score

7.5

*CVSS v3

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

The read_block function in g10/import.c in GnuPG 1.4.x before 1.4.13 and 2.0.x through 2.0.19, when importing a key, allows remote attackers to corrupt the public keyring database or cause a denial of service (application crash) via a crafted length field of an OpenPGP packet.

La función "read_block" en g10/import.c en GnuPG v1.4.x anterior a v1.4.13 y v2.0.x a la v2.0.19, cuando se importa una clave, permite a atacantes remotos corromper la base de datos del anillo de claves publicas (caída de la aplicación) o causar una denegación de servicio a través de la modificación de a longitud de campo de un paquete OpenPGP.

The GNU Privacy Guard is a tool for encrypting data and creating digital signatures, compliant with the proposed OpenPGP Internet standard and the S/MIME standard. A denial of service flaw was found in the way GnuPG parsed certain compressed OpenPGP packets. An attacker could use this flaw to send specially crafted input data to GnuPG, making GnuPG enter an infinite loop when parsing data. It was found that importing a corrupted public key into a GnuPG keyring database corrupted that keyring. An attacker could use this flaw to trick a local user into importing a specially crafted public key into their keyring database, causing the keyring to be corrupted and preventing its further use.

*Credits: N/A

CVSS Scores

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

None

Availability

High

Attack Vector

Network

Attack Complexity

Medium

Authentication

None

Confidentiality

None

Integrity

Partial

Availability

Partial

Attack Vector

Network

Attack Complexity

Medium

Authentication

None

Confidentiality

None

Integrity

None

Availability

Partial

* Common Vulnerability Scoring System

SSVC

Decision:-

Exploitation

Automatable

Tech. Impact

* Organization's Worst-case Scenario

Timeline

2012-12-06 CVE Reserved
2013-01-24 CVE Published
2024-08-06 CVE Updated
2024-08-06 First Exploit
2025-03-30 EPSS Updated
---------- Exploited in Wild
---------- KEV Due Date

CWE

CWE-20: Improper Input Validation

CAPEC

References (12)

URL	Tag	Source
http://git.gnupg.org/cgi-bin/gitweb.cgi?p=gnupg.git%3Ba=commitdiff%3Bh=f0b33b6fb8e0586e9584a7a409dcc31263776a67	X_refsource_confirm
http://www.openwall.com/lists/oss-security/2013/01/01/6	Mailing List
http://www.securityfocus.com/bid/57102	Vdb Entry
https://exchange.xforce.ibmcloud.com/vulnerabilities/80990	Vdb Entry

URL	Date	SRC
https://bugs.g10code.com/gnupg/issue1455	2024-08-06

URL	Date	SRC

URL	Date	SRC
http://lists.fedoraproject.org/pipermail/package-announce/2013-January/095513.html	2023-02-13
http://lists.fedoraproject.org/pipermail/package-announce/2013-January/095516.html	2023-02-13
http://rhn.redhat.com/errata/RHSA-2013-1459.html	2023-02-13
http://www.mandriva.com/security/advisories?name=MDVSA-2013:001	2023-02-13
http://www.ubuntu.com/usn/USN-1682-1	2023-02-13
https://bugzilla.redhat.com/show_bug.cgi?id=891142	2013-10-24
https://access.redhat.com/security/cve/CVE-2012-6085	2013-10-24

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
Gnupg Search vendor "Gnupg"		Gnupg Search vendor "Gnupg" for product "Gnupg"				1.4.0 Search vendor "Gnupg" for product "Gnupg" and version "1.4.0"		-		Affected
Gnupg Search vendor "Gnupg"		Gnupg Search vendor "Gnupg" for product "Gnupg"				1.4.2 Search vendor "Gnupg" for product "Gnupg" and version "1.4.2"		-		Affected
Gnupg Search vendor "Gnupg"		Gnupg Search vendor "Gnupg" for product "Gnupg"				1.4.3 Search vendor "Gnupg" for product "Gnupg" and version "1.4.3"		-		Affected
Gnupg Search vendor "Gnupg"		Gnupg Search vendor "Gnupg" for product "Gnupg"				1.4.4 Search vendor "Gnupg" for product "Gnupg" and version "1.4.4"		-		Affected
Gnupg Search vendor "Gnupg"		Gnupg Search vendor "Gnupg" for product "Gnupg"				1.4.5 Search vendor "Gnupg" for product "Gnupg" and version "1.4.5"		-		Affected
Gnupg Search vendor "Gnupg"		Gnupg Search vendor "Gnupg" for product "Gnupg"				1.4.8 Search vendor "Gnupg" for product "Gnupg" and version "1.4.8"		-		Affected
Gnupg Search vendor "Gnupg"		Gnupg Search vendor "Gnupg" for product "Gnupg"				1.4.10 Search vendor "Gnupg" for product "Gnupg" and version "1.4.10"		-		Affected
Gnupg Search vendor "Gnupg"		Gnupg Search vendor "Gnupg" for product "Gnupg"				1.4.11 Search vendor "Gnupg" for product "Gnupg" and version "1.4.11"		-		Affected
Gnupg Search vendor "Gnupg"		Gnupg Search vendor "Gnupg" for product "Gnupg"				1.4.12 Search vendor "Gnupg" for product "Gnupg" and version "1.4.12"		-		Affected
Gnupg Search vendor "Gnupg"		Gnupg Search vendor "Gnupg" for product "Gnupg"				2.0 Search vendor "Gnupg" for product "Gnupg" and version "2.0"		-		Affected
Gnupg Search vendor "Gnupg"		Gnupg Search vendor "Gnupg" for product "Gnupg"				2.0.1 Search vendor "Gnupg" for product "Gnupg" and version "2.0.1"		-		Affected
Gnupg Search vendor "Gnupg"		Gnupg Search vendor "Gnupg" for product "Gnupg"				2.0.3 Search vendor "Gnupg" for product "Gnupg" and version "2.0.3"		-		Affected
Gnupg Search vendor "Gnupg"		Gnupg Search vendor "Gnupg" for product "Gnupg"				2.0.4 Search vendor "Gnupg" for product "Gnupg" and version "2.0.4"		-		Affected
Gnupg Search vendor "Gnupg"		Gnupg Search vendor "Gnupg" for product "Gnupg"				2.0.5 Search vendor "Gnupg" for product "Gnupg" and version "2.0.5"		-		Affected
Gnupg Search vendor "Gnupg"		Gnupg Search vendor "Gnupg" for product "Gnupg"				2.0.6 Search vendor "Gnupg" for product "Gnupg" and version "2.0.6"		-		Affected
Gnupg Search vendor "Gnupg"		Gnupg Search vendor "Gnupg" for product "Gnupg"				2.0.7 Search vendor "Gnupg" for product "Gnupg" and version "2.0.7"		-		Affected
Gnupg Search vendor "Gnupg"		Gnupg Search vendor "Gnupg" for product "Gnupg"				2.0.8 Search vendor "Gnupg" for product "Gnupg" and version "2.0.8"		-		Affected
Gnupg Search vendor "Gnupg"		Gnupg Search vendor "Gnupg" for product "Gnupg"				2.0.10 Search vendor "Gnupg" for product "Gnupg" and version "2.0.10"		-		Affected
Gnupg Search vendor "Gnupg"		Gnupg Search vendor "Gnupg" for product "Gnupg"				2.0.11 Search vendor "Gnupg" for product "Gnupg" and version "2.0.11"		-		Affected
Gnupg Search vendor "Gnupg"		Gnupg Search vendor "Gnupg" for product "Gnupg"				2.0.12 Search vendor "Gnupg" for product "Gnupg" and version "2.0.12"		-		Affected
Gnupg Search vendor "Gnupg"		Gnupg Search vendor "Gnupg" for product "Gnupg"				2.0.13 Search vendor "Gnupg" for product "Gnupg" and version "2.0.13"		-		Affected
Gnupg Search vendor "Gnupg"		Gnupg Search vendor "Gnupg" for product "Gnupg"				2.0.14 Search vendor "Gnupg" for product "Gnupg" and version "2.0.14"		-		Affected
Gnupg Search vendor "Gnupg"		Gnupg Search vendor "Gnupg" for product "Gnupg"				2.0.15 Search vendor "Gnupg" for product "Gnupg" and version "2.0.15"		-		Affected
Gnupg Search vendor "Gnupg"		Gnupg Search vendor "Gnupg" for product "Gnupg"				2.0.16 Search vendor "Gnupg" for product "Gnupg" and version "2.0.16"		-		Affected
Gnupg Search vendor "Gnupg"		Gnupg Search vendor "Gnupg" for product "Gnupg"				2.0.17 Search vendor "Gnupg" for product "Gnupg" and version "2.0.17"		-		Affected
Gnupg Search vendor "Gnupg"		Gnupg Search vendor "Gnupg" for product "Gnupg"				2.0.18 Search vendor "Gnupg" for product "Gnupg" and version "2.0.18"		-		Affected
Gnupg Search vendor "Gnupg"		Gnupg Search vendor "Gnupg" for product "Gnupg"				2.0.19 Search vendor "Gnupg" for product "Gnupg" and version "2.0.19"		-		Affected