diff options
| author | kwm <kwm@FreeBSD.org> | 2012-05-18 19:51:18 +0800 |
|---|---|---|
| committer | kwm <kwm@FreeBSD.org> | 2012-05-18 19:51:18 +0800 |
| commit | 437c48aec2d5dce7010e4c9550b6908c3733d899 (patch) | |
| tree | f0e623904a531cafc65efc093a9d162985dca1b1 | |
| parent | 2b1c56d30fa5da98c3ffcf1a805f9f3026cc9ce4 (diff) | |
| download | freebsd-ports-gnome-437c48aec2d5dce7010e4c9550b6908c3733d899.tar.gz freebsd-ports-gnome-437c48aec2d5dce7010e4c9550b6908c3733d899.tar.zst freebsd-ports-gnome-437c48aec2d5dce7010e4c9550b6908c3733d899.zip | |
Document and fix a off-by-one vulnability in libxml2.
Obtained from: libxml upstream
Security: b8ae4659-a0da-11e1-a294-bcaec565249c
| -rw-r--r-- | security/vuxml/vuln.xml | 36 | ||||
| -rw-r--r-- | textproc/libxml2/Makefile | 5 | ||||
| -rw-r--r-- | textproc/libxml2/files/patch-xpointer.c | 41 |
3 files changed, 79 insertions, 3 deletions
diff --git a/security/vuxml/vuln.xml b/security/vuxml/vuln.xml index f462a64925b7..d0f80618563f 100644 --- a/security/vuxml/vuln.xml +++ b/security/vuxml/vuln.xml @@ -52,6 +52,42 @@ Note: Please add new entries to the beginning of this file. --> <vuxml xmlns="http://www.vuxml.org/apps/vuxml-1"> + <vuln vid="b8ae4659-a0da-11e1-a294-bcaec565249c"> + <topic>libxml2 -- An off-by-one out-of-bounds write by XPointer</topic> + <affects> + <package> + <name>libxml2</name> + <range><lt>2.7.8_3</lt></range> + </package> + </affects> + <description> + <body xmlns="http://www.w3.org/1999/xhtml"> + <p>Google chrome team reports:</p> + <blockquote cite="http://googlechromereleases.blogspot.com/2012/05/stable-channel-update.html"> + <p>An off-by-one out-of-bounds write flaw was found in the way libxml, a library + for providing XML and HTML support, evaluated certain XPointer parts (XPointer + is used by libxml to include only the part from the returned XML document, that + can be accessed using the XPath expression given with the XPointer). A remote + attacker could provide a specially-crafted XML file, which once opened in an + application, linked against libxml, would lead to that application crash, or, + potentially arbitrary code execution with the privileges of the user running + the application.</p> + <p>Note: The flaw to be exploited requires the particular application, linked + against libxml, to use the XPointer evaluation functionality.</p> + </blockquote> + </body> + </description> + <references> + <cvename>CVE-2011-3201</cvename> + <url>http://googlechromereleases.blogspot.com/2012/05/stable-channel-update.html</url> + <url>https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2011-3102</url> + </references> + <dates> + <discovery>2012-05-15</discovery> + <entry>2012-05-18</entry> + </dates> + </vuln> + <vuln vid="f5f00804-a03b-11e1-a284-0023ae8e59f0"> <topic>inspircd -- buffer overflow</topic> <affects> diff --git a/textproc/libxml2/Makefile b/textproc/libxml2/Makefile index 9d4a58567d84..309ec2a130f9 100644 --- a/textproc/libxml2/Makefile +++ b/textproc/libxml2/Makefile @@ -13,10 +13,9 @@ PORTNAME= libxml2 PORTVERSION= 2.7.8 -PORTREVISION?= 2 +PORTREVISION?= 3 CATEGORIES?= textproc gnome -MASTER_SITES= ftp://fr.rpmfind.net/pub/libxml/ \ - ftp://gd.tuwien.ac.at/pub/libxml/ \ +MASTER_SITES= ftp://gd.tuwien.ac.at/pub/libxml/ \ ftp://xmlsoft.org/libxml2/ DIST_SUBDIR= gnome2 diff --git a/textproc/libxml2/files/patch-xpointer.c b/textproc/libxml2/files/patch-xpointer.c new file mode 100644 index 000000000000..877ea2a7d920 --- /dev/null +++ b/textproc/libxml2/files/patch-xpointer.c @@ -0,0 +1,41 @@ +From d8e1faeaa99c7a7c07af01c1c72de352eb590a3e Mon Sep 17 00:00:00 2001 +From: Jüri Aedla <asd@ut.ee> +Date: Mon, 07 May 2012 07:06:56 +0000 +Subject: Fix an off by one pointer access + +getting out of the range of memory allocated for xpointer decoding +CVE-2011-3102 + +--- +diff --git a/xpointer.c b/xpointer.c +index 37afa3a..0b463dd 100644 +--- xpointer.c ++++ xpointer.c +@@ -1007,21 +1007,14 @@ xmlXPtrEvalXPtrPart(xmlXPathParserContextPtr ctxt, xmlChar *name) { + NEXT; + break; + } +- *cur++ = CUR; + } else if (CUR == '(') { + level++; +- *cur++ = CUR; + } else if (CUR == '^') { +- NEXT; +- if ((CUR == ')') || (CUR == '(') || (CUR == '^')) { +- *cur++ = CUR; +- } else { +- *cur++ = '^'; +- *cur++ = CUR; +- } +- } else { +- *cur++ = CUR; ++ if ((NXT(1) == ')') || (NXT(1) == '(') || (NXT(1) == '^')) { ++ NEXT; ++ } + } ++ *cur++ = CUR; + NEXT; + } + *cur = 0; +-- +cgit v0.9.0.2 |