CVE-2012-6711

A heap-based buffer overflow exists in GNU Bash before 4.3 when wide characters, not supported by the current locale set in the LC_CTYPE environment variable, are printed through the echo built-in function. A local attacker, who can provide data to print through the "echo -e" built-in function, may use this flaw to crash a script or execute code with the privileges of the bash process. This occurs because ansicstr() in lib/sh/strtrans.c mishandles u32cconv().

CVSS v3.0 7.8 HIGH
CVSS v2.0 4.6 MEDIUM

7.8^/10

CVSS v3.0 : HIGH

Vector : AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Exploitability : 1.8 / Impact : 5.9

Attack Vector LOCAL

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

4.6^/10

CVSS v2.0 : MEDIUM

Vector : AV:L/AC:L/Au:N/C:P/I:P/A:P

Exploitability : 3.9 / Impact : 6.4

Access Vector LOCAL

Access Complexity LOW

Authentication NONE

Confidentiality Impact PARTIAL

Integrity Impact PARTIAL

Availability Impact PARTIAL

References

Link	Resource
https://bugzilla.redhat.com/show_bug.cgi?id=1721071	Issue Tracking Third Party Advisory
http://git.savannah.gnu.org/cgit/bash.git/commit/?h=devel&id=863d31ae775d56b785dc5b0105b6d251515d81d5	Mailing List Patch Third Party Advisory
http://www.securityfocus.com/bid/108824
https://support.f5.com/csp/article/K05122252
https://support.f5.com/csp/article/K05122252?utm_source=f5support&utm_medium=RSS
https://usn.ubuntu.com/4180-1/

Advertisement

Configurations

Configuration 1 (hide)

cpe:2.3:a:gnu:bash:*:*:*:*:*:*:*:*

Configuration 2 (hide)

cpe:2.3:o:redhat:enterprise_linux:7.0:*:*:*:*:*:*:*

Information

Published : 2019-06-18 11:15

Updated : 2019-06-20 02:15

NVD link : CVE-2012-6711

Mitre link : CVE-2012-6711

JSON object : View

CWE

CWE-119

Improper Restriction of Operations within the Bounds of a Memory Buffer

Advertisement

Products Affected

gnu

bash

redhat

enterprise_linux

{"cve": {"data_type": "CVE", "references": {"reference_data": [{"url": "https://bugzilla.redhat.com/show_bug.cgi?id=1721071", "name": "https://bugzilla.redhat.com/show_bug.cgi?id=1721071", "tags": ["Issue Tracking", "Third Party Advisory"], "refsource": "MISC"}, {"url": "http://git.savannah.gnu.org/cgit/bash.git/commit/?h=devel&id=863d31ae775d56b785dc5b0105b6d251515d81d5", "name": "http://git.savannah.gnu.org/cgit/bash.git/commit/?h=devel&id=863d31ae775d56b785dc5b0105b6d251515d81d5", "tags": ["Mailing List", "Patch", "Third Party Advisory"], "refsource": "MISC"}, {"url": "http://www.securityfocus.com/bid/108824", "name": "108824", "tags": [], "refsource": "BID"}, {"url": "https://support.f5.com/csp/article/K05122252", "name": "https://support.f5.com/csp/article/K05122252", "tags": [], "refsource": "CONFIRM"}, {"url": "https://support.f5.com/csp/article/K05122252?utm_source=f5support&utm_medium=RSS", "name": "https://support.f5.com/csp/article/K05122252?utm_source=f5support&utm_medium=RSS", "tags": [], "refsource": "CONFIRM"}, {"url": "https://usn.ubuntu.com/4180-1/", "name": "USN-4180-1", "tags": [], "refsource": "UBUNTU"}]}, "data_format": "MITRE", "description": {"description_data": [{"lang": "en", "value": "A heap-based buffer overflow exists in GNU Bash before 4.3 when wide characters, not supported by the current locale set in the LC_CTYPE environment variable, are printed through the echo built-in function. A local attacker, who can provide data to print through the \"echo -e\" built-in function, may use this flaw to crash a script or execute code with the privileges of the bash process. This occurs because ansicstr() in lib/sh/strtrans.c mishandles u32cconv()."}]}, "problemtype": {"problemtype_data": [{"description": [{"lang": "en", "value": "CWE-119"}]}]}, "data_version": "4.0", "CVE_data_meta": {"ID": "CVE-2012-6711", "ASSIGNER": "cve@mitre.org"}}, "impact": {"baseMetricV2": {"cvssV2": {"version": "2.0", "baseScore": 4.6, "accessVector": "LOCAL", "vectorString": "AV:L/AC:L/Au:N/C:P/I:P/A:P", "authentication": "NONE", "integrityImpact": "PARTIAL", "accessComplexity": "LOW", "availabilityImpact": "PARTIAL", "confidentialityImpact": "PARTIAL"}, "severity": "MEDIUM", "acInsufInfo": false, "impactScore": 6.4, "obtainAllPrivilege": false, "exploitabilityScore": 3.9, "obtainUserPrivilege": false, "obtainOtherPrivilege": false, "userInteractionRequired": false}, "baseMetricV3": {"cvssV3": {"scope": "UNCHANGED", "version": "3.0", "baseScore": 7.8, "attackVector": "LOCAL", "baseSeverity": "HIGH", "vectorString": "CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "integrityImpact": "HIGH", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "LOW", "confidentialityImpact": "HIGH"}, "impactScore": 5.9, "exploitabilityScore": 1.8}}, "publishedDate": "2019-06-18T18:15Z", "configurations": {"nodes": [{"children": [], "operator": "OR", "cpe_match": [{"cpe23Uri": "cpe:2.3:a:gnu:bash:*:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": true, "versionEndIncluding": "4.3", "versionStartIncluding": "4.2"}]}, {"children": [], "operator": "OR", "cpe_match": [{"cpe23Uri": "cpe:2.3:o:redhat:enterprise_linux:7.0:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": true}]}], "CVE_data_version": "4.0"}, "lastModifiedDate": "2019-06-20T09:15Z"}