Security

An application that includes BeanShell on the classpath may be vulnerable if another part of the application uses Java serialization or XStream to deserialize data from an untrusted source. A vulnerable application could be exploited for remote code execution, including executing arbitrary shell commands.

See also the oss security CVE assignments.

The ia32-libs and ia32-libs-gtk packages contain 32 bit versions of various libraries for use on 64 bit systems. This update rolls in all security fixes made to these libraries since the start of Squeeze LTS.

fixes "Dialback secrets are generated using a non-cryptographically secure PRNG"

See the jabberd bug report for more details.

bug 955280: session not restored after logout/login.

bug 963680: Unable to create new link to application.

bug 967668: KDE Frameworks 5.19.0 fixes multiple vulnerabilities.

A flaw was found in the CXGB3 kernel driver when the network was considered congested. The kernel would incorrectly misinterpret the congestion as an error condition and incorrectly free/clean up the skb. When the device would then send the skb's queued, these structures would be referenced and may panic the system or allow an attacker to escalate privileges in a use-after-free scenario. (CVE-2015-8812)

When ctx access is used, the kernel often needs to expand/rewrite instructions, so after that patching, branch offsets have to be adjusted for both forward and backward jumps in the new eBPF program, but for backward jumps it fails to account the delta. Meaning, for example, if the expansion happens exactly on the insn that sits at the jump target, it doesn't fix up the back jump offset. (CVE-2016-2383)

A vulnerability was found in the Linux kernel. There is a possibility of double-free on 'umidi' object. The 'umidi' object will be free'd on the error path by snd_usbmidi_free() when tearing down the rawmidi interface causing the system panic. (CVE-2016-2384)

A flaw was found in the Linux kernel's hugetlbfs handling of punching holes in hugetlbfs files with either truncate or fallocate. When truncating a hugetlbfs file, this bug could prevent some pages from being unmapped. If pages are not properly unmapped during truncate, the kernel bug is hit which leads the system to panic. In the fallocate hole punch case, this bug could prevent pages from being unmapped as in the truncate case also. However, for hole punch the result is that unmapped pages will not be removed during the operation. For hole punch, it is also possible that more pages than desired will be unmapped. This unnecessary unmapping will cause page faults to reestablish the mappings on subsequent page access. (CVE-2016-0617)

The EbmlUnicodeString::UpdateFromUTF8 function in libEBML before 1.3.3 allows context-dependent attackers to obtain sensitive information from process heap memory via a crafted UTF-8 string, which triggers an invalid memory access. (CVE-2015-8790)

The EbmlElement::ReadCodedSizeValue function in libEBML before 1.3.3 allows context-dependent attackers to obtain sensitive information from process heap memory via a crafted length value in an EBML id, which triggers an invalid memory access. (CVE-2015-8791)

865241: Konqueror allows cipher suites with less than 128 bit encryption.

957006: when opening /dev/ folder with dolphin (as su) window opens but scroll down doesn't work.

A vulnerability was discovered in OkHttp that allows an attacker to bypass certificate pinning. OkHttp did not validate that the pinned certificate was in the chain to a trusted certificate authority.

It was discovered that the SSLv2 servers using OpenSSL accepted SSLv2 connection handshakes that indicated non-zero clear key length for non-export cipher suites. An attacker could use this flaw to decrypt recorded SSLv2 sessions with the server by using it as a decryption oracle.(CVE-2016-0703)

It was discovered that the SSLv2 protocol implementation in OpenSSL did not properly implement the Bleichenbacher protection for export cipher suites. An attacker could use a SSLv2 server using OpenSSL as a Bleichenbacher oracle. (CVE-2016-0704)

CVE-2016-0702: Yuval Yarom from the University of Adelaide and NICTA, Daniel Genkin from Technion and Tel Aviv University, and Nadia Heninger from the University of Pennsylvania discovered a side-channel attack which makes use of cache-bank conflicts on the Intel Sandy-Bridge microarchitecture. This could allow local attackers to recover RSA private keys.

CVE-2016-0705: Adam Langley from Google discovered a double free bug when parsing malformed DSA private keys. This could allow remote attackers to cause a denial of service or memory corruption in applications parsing DSA private keys received from untrusted sources.

CVE-2016-0797: Guido Vranken discovered an integer overflow in the BN_hex2bn and BN_dec2bn functions that can lead to a NULL pointer dereference and heap corruption. This could allow remote attackers to cause a denial of service or memory corruption in applications processing hex or dec data received from untrusted sources.

CVE-2016-0798: Emilia Käsper of the OpenSSL development team discovered a memory leak in the SRP database lookup code. To mitigate the memory leak, the seed handling in SRP_VBASE_get_by_user is now disabled even if the user has configured a seed. Applications are advised to migrate to the SRP_VBASE_get1_by_user function.

CVE-2016-0799: Guido Vranken discovered an integer overflow in the BIO_*printf functions that could lead to an OOB read when printing very long strings. Additionally the internal doapr_outch function can attempt to write to an arbitrary memory location in the event of a memory allocation failure. These issues will only occur on platforms where sizeof(size_t) > sizeof(int) like many 64 bit systems. This could allow remote attackers to cause a denial of service or memory corruption in applications that pass large amounts of untrusted data to the BIO_*printf functions.

Additionally the EXPORT and LOW ciphers were disabled since they could be used as part of the DROWN (CVE-2016-0800) and SLOTH (CVE-2015-7575) attacks, but note that the oldstable (wheezye) and stable (jessie) distributions are not affected by those attacks since the SSLv2 protocol has already been dropped in the openssl package version 1.0.0c-2.

A cross-protocol attack was discovered that could lead to decryption of TLS sessions by using a server supporting SSLv2 and EXPORT cipher suites as a Bleichenbacher RSA padding oracle. Note that traffic between clients and non-vulnerable servers can be decrypted provided another server supporting SSLv2 and EXPORT ciphers (even with a different protocol such as SMTP, IMAP or POP) shares the RSA keys of the non-vulnerable server. This vulnerability is known as DROWN.

An authorization vulnerability in OpenStack Image service was discovered, which allowed image-status manipulation using locations. By removing the last location of an image, an authenticated user could change the status from 'active' to 'queue'. A malicious tenant could exploit this flaw to silently replace owned image data, regardless of its original creator or visibility settings. Only environments with show_multiple_locations set to true (not default) were affected.

PCRE does not validate that handling the (*ACCEPT) verb will occur within the bounds of the cworkspace stack buffer, leading to a stack buffer overflow.

The pcre_compile2 function in pcre_compile.c in PCRE 8.38 mishandles the /((?:F?+(?:^(?(R)a+\"){99}-))(?J)(?'R'(?'R'<((?'RR'(?'R'\){97)?J)?J)(?'R'(?'R'\){99|(:(?|(?'R')(\k'R')|((?'R')))H'R'R)(H'R))))))/ pattern and related patterns with named subgroups, which allows remote attackers to cause a denial of service (heap-based buffer overflow) or possibly have unspecified other impact via a crafted regular expression, as demonstrated by a JavaScript RegExp object encountered by Konqueror.

Stephane Chazelas discovered a bug in the environment handling in Perl. Perl provides a Perl-space hash variable, %ENV, in which environment variables can be looked up. If a variable appears twice in envp, only the last value would appear in %ENV, but getenv would return the first. Perl's taint security mechanism would be applied to the value in %ENV, but not to the other rest of the environment. This could result in an ambiguous environment causing environment variables to be propagated to subprocesses, despite the protections supposedly offered by taint checking.

A heap-based buffer overflow flaw was reported in Pillow's PCD decoding. By tricking an unsuspecting user or automated script into processing a specially crafted PCD image file, an attacker could cause the Python process to crash, or, potentially, execute arbitrary code with the privileges of the Python script processing the image.

The problem is that the "ImagingPcdDecode()" function in PcdDecode.c increases a the unpack buffer pointer by 4 bytes (=32bit color), although the buffer is only supposed to hold 24bits of color (=3 bytes). This ultimately leads to an array indexing error resulting in an out-of-bounds write.

It was discovered that there was a buffer overflow in pixman, a pixel-manipulation library for X and cairo.

Mark Striemer discovered that Django incorrectly handled user-supplied redirect URLs containing basic authentication credentials. A remote attacker could possibly use this issue to perform a cross-site scripting attack or a malicious redirect. (CVE-2016-2512)

Sjoerd Job Postmus discovered that Django incorrectly handled timing when doing password hashing operations. A remote attacker could possibly use this issue to perform user enumeration. (CVE-2016-2513)

CVE-2016-2569: Squid 3.x before 3.5.15 and 4.x before 4.0.7 does not properly append data to String objects, which allows remote servers to cause a denial of service (assertion failure and daemon exit) via a long string, as demonstrated by a crafted HTTP Vary header.

CVE-2016-2571: http.cc in Squid 3.x before 3.5.15 and 4.x before 4.0.7 proceeds with the storage of certain data after a response-parsing failure, which allows remote HTTP servers to cause a denial of service (assertion failure and daemon exit) via a malformed response.

Directory traversal vulnerability in RequestUtil.java in Apache Tomcat 6.x before 6.0.45, 7.x before 7.0.65, and 8.x before 8.0.27 allows remote authenticated users to bypass intended SecurityManager restrictions and list a parent directory via a /.. (slash dot dot) in a pathname used by a web application in a getResource, getResourceAsStream, or getResourcePaths call, as demonstrated by the $CATALINA_BASE/webapps directory. (CVE-2015-5174)

The Mapper component in Apache Tomcat 6.x before 6.0.45, 7.x before 7.0.67, 8.x before 8.0.30, and 9.x before 9.0.0.M2 processes redirects before considering security constraints and Filters, which allows remote attackers to determine the existence of a directory via a URL that lacks a trailing / (slash) character. (CVE-2015-5345)

The (1) Manager and (2) Host Manager applications in Apache Tomcat 7.x before 7.0.68, 8.x before 8.0.31, and 9.x before 9.0.0.M2 establish sessions and send CSRF tokens for arbitrary new requests, which allows remote attackers to bypass a CSRF protection mechanism by using a token. (CVE-2015-5351)

Apache Tomcat 6.x before 6.0.45, 7.x before 7.0.68, 8.x before 8.0.31, and 9.x before 9.0.0.M2 does not place org.apache.catalina.manager.StatusManagerServlet on the org/apache/catalina/core/RestrictedServlets.properties list, which allows remote authenticated users to bypass intended SecurityManager restrictions and read arbitrary HTTP requests, and consequently discover session ID values, via a crafted web application. (CVE-2016-0706)

The session-persistence implementation in Apache Tomcat 6.x before 6.0.45, 7.x before 7.0.68, 8.x before 8.0.31, and 9.x before 9.0.0.M2 mishandles session attributes, which allows remote authenticated users to bypass intended SecurityManager restrictions and execute arbitrary code in a privileged context via a web application that places a crafted object in a session. (CVE-2016-0714)

The setGlobalContext method in org/apache/naming/factory/ResourceLinkFactory.java in Apache Tomcat 7.x before 7.0.68, 8.x before 8.0.31, and 9.x before 9.0.0.M3 does not consider whether ResourceLinkFactory.setGlobalContext callers are authorized, which allows remote authenticated users to bypass intended SecurityManager restrictions and read or write to arbitrary application data, or cause a denial of service (application disruption), via a web application that sets a crafted global context. (CVE-2016-0763)

The vlc package has been updated to version 2.2.2, which fixes several bugs and possible security issues. See the NEWS file for details.

Xen 4.6.x and earlier allows local guest administrators to cause a denial of service (host reboot) via vectors related to multiple mappings of MMIO pages with different cachability settings. (CVE-2016-2270)

VMX in Xen 4.6.x and earlier, when using an Intel or Cyrix CPU, allows local HVM guest users to cause a denial of service (guest crash) via vectors related to a non-canonical RIP. (CVE-2016-2271)

From the Debian-LTS advisory:

Gustavo Grieco discovered that xerces-c, a validating XML parser library for C++, mishandles certain kinds of malformed input documents, resulting in buffer overflows during processing and error reporting. These flaws could lead to a denial of service in applications using the xerces-c library, or potentially, to the execution of arbitrary code.

CVE-2016-2054: The incorrect handling of user-supplied input in the "config" command can trigger a stack-based buffer overflow, resulting in denial of service (via application crash) or remote code execution.

CVE-2016-2055: The incorrect handling of user-supplied input in the "config" command can lead to an information leak by serving sensitive configuration files to a remote user.

CVE-2016-2056: The commands handling password management do not properly validate user-supplied input, and are thus vulnerable to shell command injection by a remote user.

CVE-2016-2057: Incorrect permissions on an internal queuing system allow a user with a local account on the xymon master server to bypass all network-based access control lists, and thus inject messages directly into xymon.

CVE-2016-2058: Incorrect escaping of user-supplied input in status webpages can be used to trigger reflected cross-site scripting attacks.