Source: libxml2 Version: 2.9.4+dfsg1-2.2 Severity: important Tags: security upstream Forwarded: https://bugzilla.gnome.org/show_bug.cgi?id=781333
Hi, the following vulnerability was published for libxml2. CVE-2017-9047[0]: | A buffer overflow was discovered in libxml2 | 20904-GITv2.9.4-16-g0741801. The function xmlSnprintfElementContent in | valid.c is supposed to recursively dump the element content definition | into a char buffer 'buf' of size 'size'. The variable len is assigned | strlen(buf). If the content->type is XML_ELEMENT_CONTENT_ELEMENT, then | (i) the content->prefix is appended to buf (if it actually fits) | whereupon (ii) content->name is written to the buffer. However, the | check for whether the content->name actually fits also uses 'len' | rather than the updated buffer length strlen(buf). This allows us to | write about "size" many bytes beyond the allocated memory. This | vulnerability causes programs that use libxml2, such as PHP, to crash. >From [1] this is [2], which is not yet opened. The report at [1] contains a proposed patch, but which is not yet included upstream. If you fix the vulnerability please also make sure to include the CVE (Common Vulnerabilities & Exposures) id in your changelog entry. For further information see: [0] https://security-tracker.debian.org/tracker/CVE-2017-9047 https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2017-9047 [1] http://www.openwall.com/lists/oss-security/2017/05/15/1 [2] https://bugzilla.gnome.org/show_bug.cgi?id=781333 Please adjust the affected versions in the BTS as needed. Regards, Salvatore _______________________________________________ Secure-testing-team mailing list [email protected] http://lists.alioth.debian.org/cgi-bin/mailman/listinfo/secure-testing-team
