drucken bookmarks versenden konfigurieren admin pdf Sicherheit: Pufferüberlauf in flex
Name: |
Pufferüberlauf in flex |
|
ID: |
201701-31 |
|
Distribution: |
Gentoo |
|
Plattformen: |
Keine Angabe |
|
Datum: |
Mi, 11. Januar 2017, 17:11 |
|
Referenzen: |
http://nvd.nist.gov/nvd.cfm?cvename=CVE-2016-6354 |
|
Applikationen: |
Fast Lexical Analyzer Generator |
|
Originalnachricht |
This is an OpenPGP/MIME signed message (RFC 4880 and 3156) --QjECd3nB8eIDliiUpVLt8iHxvllTkbbXD Content-Type: multipart/mixed; boundary="GxU5bwJ95f1L4h0XeXH1GCldBowv5og6A" From: Aaron Bauman <bman@gentoo.org> To: gentoo-announce@lists.gentoo.org Message-ID: <8296ae92-f48f-9486-2cda-068ed5a575a4@gentoo.org> Subject: [ GLSA 201701-31 ] flex: Potential insecure code generation
--GxU5bwJ95f1L4h0XeXH1GCldBowv5og6A Content-Type: multipart/alternative; boundary="------------2359F7E336C19C988752C4B5"
This is a multi-part message in MIME format. --------------2359F7E336C19C988752C4B5 Content-Type: text/plain; charset=utf- Content-Transfer-Encoding: quoted-printable
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Gentoo Linux Security Advisory GLSA 201701-31 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - https://security.gentoo.org/ - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
Severity: Normal Title: flex: Potential insecure code generation Date: January 11, 2017 Bugs: #589820 ID: 201701-31
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
Synopsis ========
Flex might generate code with a buffer overflow making applications using such scanners vulnerable to the execution of arbitrary code.
Background ==========
flex is a programming tool used to generate scanners (programs which recognize lexical patterns in text).
Affected packages =================
------------------------------------------------------------------- Package / Vulnerable / Unaffected ------------------------------------------------------------------- 1 sys-devel/flex < 2.6.1 >= 2.6.1
Description ===========
A heap-based buffer overflow in the yy_get_next_buffer function in Flex might allow context-dependent attackers to cause a denial of service or possibly execute arbitrary code via vectors involving num_to_read.
Impact ======
Context-dependent attackers could cause a Denial of Service condition or possibly execute arbitrary code with the privileges of the process.
Workaround ==========
There is no known workaround at this time.
Resolution ==========
All flex users should upgrade to the latest version:
# emerge --sync # emerge --ask --oneshot --verbose ">=sys-devel/flex-2.6.1"
Packages which depend on flex may need to be recompiled. Tools such as qdepends (included in app-portage/portage-utils) may assist in identifying these packages:
# emerge -1 -a -v $(qdepends -CQ sys-devel/flex | sed 's/^/=/')
References ==========
[ 1 ] CVE-2016-6354 http://nvd.nist.gov/nvd.cfm?cvename=CVE-2016-6354
Availability ============
This GLSA and any updates to it are available for viewing at the Gentoo Security Website:
https://security.gentoo.org/glsa/201701-31
Concerns? =========
Security is a primary focus of Gentoo Linux and ensuring the confidentiality and security of our users' machines is of utmost importance to us. Any security concerns should be addressed to security@gentoo.org or alternatively, you may file a bug at https://bugs.gentoo.org.
License =======
Copyright 2017 Gentoo Foundation, Inc; referenced text belongs to its owner(s).
The contents of this document are licensed under the Creative Commons - Attribution / Share Alike license.
http://creativecommons.org/licenses/by-sa/2.5
--------------2359F7E336C19C988752C4B5 Content-Type: text/html; charset=utf-8 Content-Transfer-Encoding: quoted-printable
<html> <head>
<meta http-equiv=3D"Content-Type" content=3D"text/html; charset=3Dutf= -8"> </head> <body bgcolor=3D"#FFFFFF" text=3D"#000000"> <p> <meta http-equiv=3D"Content-Type" content=3D"text/html; charset=3Du= tf-8"> </p> <pre style=3D"color: rgb(0, 0, 0); font-style: normal; font-variant-l= igatures: normal; font-variant-caps: normal; font-weight: normal; letter-= spacing: normal; orphans: 2; text-align: start; text-indent: 0px; text-tr= ansform: none; widows: 2; word-spacing: 0px; -webkit-text-stroke-width: 0= px; word-wrap: break-word; white-space: pre-wrap;">- - - - - - - - - - - = - - - - - - - - - - - - - - - - - - - - - - - - - Gentoo Linux Security Advisory GLSA 201701-31 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - <a class=3D"moz-txt-link-freet= ext" href=3D"https://security.gentoo.org/">https://security.gentoo.org/</= a> - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
Severity: Normal Title: flex: Potential insecure code generation Date: January 11, 2017 Bugs: #589820 ID: 201701-31
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
Synopsis =3D=3D=3D=3D=3D=3D=3D=3D
Flex might generate code with a buffer overflow making applications using such scanners vulnerable to the execution of arbitrary code.
Background =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D
flex is a programming tool used to generate scanners (programs which recognize lexical patterns in text).
Affected packages =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D
------------------------------------------------------------------- Package / Vulnerable / Unaffected ------------------------------------------------------------------- 1 sys-devel/flex < 2.6.1 >=3D 2= =2E6.1=20
Description =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D
A heap-based buffer overflow in the yy_get_next_buffer function in Flex might allow context-dependent attackers to cause a denial of service or possibly execute arbitrary code via vectors involving num_to_read.
Impact =3D=3D=3D=3D=3D=3D
Context-dependent attackers could cause a Denial of Service condition or possibly execute arbitrary code with the privileges of the process.
Workaround =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D
There is no known workaround at this time.
Resolution =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D
All flex users should upgrade to the latest version:
# emerge --sync # emerge --ask --oneshot --verbose ">=3Dsys-devel/flex-2.6.1"
Packages which depend on flex may need to be recompiled. Tools such as qdepends (included in app-portage/portage-utils) may assist in identifying these packages:
# emerge -1 -a -v $(qdepends -CQ sys-devel/flex | sed 's/^/=3D/')
References =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D
[ 1 ] CVE-2016-6354 <a class=3D"moz-txt-link-freetext" href=3D"http://nvd.nist.gov/nvd.= cfm?cvename=3DCVE-2016-6354">http://nvd.nist.gov/nvd.cfm?cvename=3DCVE-20= 16-6354</a>
Availability =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D
This GLSA and any updates to it are available for viewing at the Gentoo Security Website:
<a class=3D"moz-txt-link-freetext" href=3D"https://security.gentoo.org/g= lsa/201701-31">https://security.gentoo.org/glsa/201701-31</a>
Concerns? =3D=3D=3D=3D=3D=3D=3D=3D=3D
Security is a primary focus of Gentoo Linux and ensuring the confidentiality and security of our users' machines is of utmost importance to us. Any security concerns should be addressed to <a class=3D"moz-txt-link-abbreviated" href=3D"mailto:security@gentoo.org"= >security@gentoo.org</a> or alternatively, you may file a bug at <a class=3D"moz-txt-link-freetext" href=3D"https://bugs.gentoo.org">https= ://bugs.gentoo.org</a>.
License =3D=3D=3D=3D=3D=3D=3D
Copyright 2017 Gentoo Foundation, Inc; referenced text belongs to its owner(s).
The contents of this document are licensed under the Creative Commons - Attribution / Share Alike license.
<a class=3D"moz-txt-link-freetext" href=3D"http://creativecommons.org/lic= enses/by-sa/2.5">http://creativecommons.org/licenses/by-sa/2.5</a></pre> </body> </html>
--------------2359F7E336C19C988752C4B5--
--GxU5bwJ95f1L4h0XeXH1GCldBowv5og6A--
--QjECd3nB8eIDliiUpVLt8iHxvllTkbbXD Content-Type: application/pgp-signature; name="signature.asc" Content-Description: OpenPGP digital signature Content-Disposition: attachment; filename="signature.asc"
-----BEGIN PGP SIGNATURE----- Version: GnuPG v2
iQJ8BAEBCgBmBQJYdiggXxSAAAAAAC4AKGlzc3Vlci1mcHJAbm90YXRpb25zLm9w ZW5wZ3AuZmlmdGhob3JzZW1hbi5uZXQ1OTcyRDI4NDhFOEE0NDYwRTdERTY4QUM5 RjI4QkQ4QkQxRTM5NUZGAAoJEJ8ovYvR45X/5ZcP/ieB0C+fSr7vf9l0f6oPFipA SLY9KP+SXpfeL02qL8ptPhmnIsuMn/ut4EOomEQAfG5T9X4Qe9pOdBI3OPfmRsHL v+2egefjqjV5VN80z1w3rs9tbGQHJ020q1vYUYBhfxF0zb7IdlXL0z0UTxIMByPh zJ2zaB0I801JJPWR1JQjG+Q9l7m2Srs5X+HD1gMVzStaUnDELVswl9yfyG7xQEtL aQOUjNLCeJ7WTku7/RA+YwG+UQFBnzGb2hrgeOV0um0Jil/uSp2IA4k9ichr1zBl Bio5szLmQ0ahAIKUUAJk3aFWBoqbaQpR3es/9HeLDAL7MWAOZbEIbZG0g88b24eL o1/3tyRu2/JQOkuRRqJIGxrGY/jAJo04B3jn8OJhwNOruitvg/LKw5wPFdURCEnE l3JNcAg35NfAhnGc6kVgc7H/dioKqh3RobO/Ksdmeg1ZWmyD2qwucTY1fWcfRCDk EnWbPTiErYksvbcR6miOHLO5hCmzOZ0sDRslIT9r9bRerOUf44Y/0RF0/kU/MeMv H+guKkxUAGi0oxeXUEnLq2EWrQYa9HO+qNsNgCX6eXWEErd4Yh4E2+/qmX+Lf4LR ZhzkZ/nVfR60V2Cf/aKbgO7axtd+0GbRJRrVEM5T3Libampvthn08B6VgsWLXlw2 q4T8jZHt9IH2NS49loPY =M9nn -----END PGP SIGNATURE-----
--QjECd3nB8eIDliiUpVLt8iHxvllTkbbXD--
|
|
|
|