important: grub2/perl security update
important
An update for grub2/perl is now available for NewStart CGSL MAIN 6.06.
NewStart Security has rated this update as having a security impact of important. A Common Vunlnerability Scoring System(CVSS)base score, which gives a detailed severity rating, is available for each vulnerability from the CVElink(s) in the References section.
grub2:
perl:
Security Fix(es):
grub2: An integer overflow flaw was found in the way the lzo library decompressed certain archives compressed with the LZO algorithm. An attacker could create a specially crafted LZO-compressed input that, when decompressed by an application using the lzo library, would cause that application to crash or, potentially, execute arbitrary code.(CVE-2014-4607)
grub2: A flaw was found in the way grub2 handled backspace characters entered in username and password prompts. An attacker with access to the system console could use this flaw to bypass grub2 password protection and gain administrative access to the system.(CVE-2015-8370)
grub2: A flaw was found in the grub2-set-bootflag utility of grub2. A local attacker could run this utility under resource pressure (for example by setting RLIMIT), causing grub2 configuration files to be truncated and leaving the system unbootable on subsequent reboots.(CVE-2019-14865)
grub2: A flaw was found in grub2, prior to version 2.06. An attacker may use the GRUB 2 flaw to hijack and tamper the GRUB verification process. This flaw also allows the bypass of Secure Boot protections. In order to load an untrusted or modified kernel, an attacker would first need to establish access to the system such as gaining physical access, obtain the ability to alter a pxe-boot network, or have remote access to a networked system with root access. With this access, an attacker could then craft a string to cause a buffer overflow by injecting a malicious payload that leads to arbitrary code execution within GRUB. The highest threat from this vulnerability is to data confidentiality and integrity as well as system availability.(CVE-2020-10713)
grub2: A flaw was found in current grub2 versions as shipped with Red Hat Enterprise Linux 7 and 8, where the grub memory allocator doesn't check for possible arithmetic overflows on the requested allocation size. This issue leads the function to return invalid memory allocations, causing heap-based overflows in several code paths. The highest threat from this vulnerability is to confidentiality, integrity as well as system availability.(CVE-2020-14308)
grub2: A flaw was found in grub2. When handling squashfs filesystems containing a symbolic link with name length of UINT32 bytes in size, the name size leads to an arithmetic overflow leading to a zero-size allocation further causing a heap-based buffer overflow with attacker controlled data. The highest threat from this vulnerability is to data confidentiality and integrity as well as system availability.(CVE-2020-14309)
grub2: A flaw was found in grub2. An expected font value is not verified before proceeding with buffer allocations allowing an attacker to use a malicious font file to create an arithmetic overflow, zero-sized allocation, and further heap-based buffer overflow. The highest threat from this vulnerability is to data integrity and system availability.(CVE-2020-14310)
grub2: A flaw was found in grub2 while handling symlink on ext filesystems. A filesystem containing a symbolic link with an inode size of UINT32_MAX causes an arithmetic overflow, leading to a zero-sized memory allocation with a subsequent heap-based buffer overflow. The highest threat from this vulnerability is to integrity and system availability.(CVE-2020-14311)
grub2: GRUB2 fails to validate kernel signature when booted directly without shim, allowing secure boot to be bypassed. This only affects systems where the kernel signing certificate has been imported directly into the secure boot database and the GRUB image is booted directly without the use of shim. This issue affects GRUB2 version 2.04 and prior versions.(CVE-2020-15705)
grub2: bugfix
perl: Directory traversal vulnerability in the Archive::Tar Perl module 1.36 and earlier allows user-assisted remote attackers to overwrite arbitrary files via a TAR archive that contains a file whose name is an absolute path or has ".." sequences.(CVE-2007-4829)
perl: The rmtree function in lib/File/Path.pm in Perl 5.10 does not properly check permissions before performing a chmod, which allows local users to modify the permissions of arbitrary files via a symlink attack, a different vulnerability than CVE-2005-0448 and CVE-2004-0452(CVE-2008-2827)
perl: Perl 5.10.1 allows context-dependent attackers to cause a denial of service (application crash) via a UTF-8 character with a large, invalid codepoint, which is not properly handled during a regular-expression match(CVE-2009-3626)
perl: The bsd_glob function in the File::Glob module for Perl before 5.14.2 allows context-dependent attackers to cause a denial of service (crash) via a glob expression with the GLOB_ALTDIRFUNC flag, which triggers an uninitialized pointer dereference.(CVE-2011-2728)
perl: val injection vulnerability in the Digest module before 1.17 for Perl allows context-dependent attackers to execute arbitrary commands via the new constructor.(CVE-2011-3597)
perl: The _compile function in Maketext.pm in the Locale::Maketext implementation in Perl before 5.17.7 does not properly handle backslashes and fully qualified method names during compilation of bracket notation, which allows context-dependent attackers to execute arbitrary commands via crafted input to an application that accepts translation strings from users, as demonstrated by the TWiki application before 5.1.3, and the Foswiki application 1.0.x through 1.0.10 and 1.1.x through 1.1.6.(CVE-2012-6329)
perl: The rehash mechanism in Perl 5.8.2 through 5.16.x allows context-dependent attackers to cause a denial of service (memory consumption and crash) via a crafted hash key.(CVE-2013-1667)
perl: It was found that perl can load modules from the current directory if not found in the module directories, via the @INC path. A local, authenticated attacker could create a specially crafted module in a writable directory and trick a user into running a perl program from that directory; if the module is not found in previous @INC paths, it will load and execute the attacker's module.(CVE-2016-1238)
perl: Perl might allow context-dependent attackers to bypass the taint protection mechanism in a child process via duplicate environment variables in envp.(CVE-2016-2381)
perl: The XSLoader::load method in XSLoader in Perl does not properly locate .so files when called in a string eval, which might allow local users to execute arbitrary code via a Trojan horse library under the current working directory.(CVE-2016-6185)
perl: Perl before 5.26.3 and 5.28.x before 5.28.1 has a buffer overflow via a crafted regular expression that triggers invalid write operations.(CVE-2018-18311)
perl: Perl before 5.26.3 and 5.28.0 before 5.28.1 has a buffer overflow via a crafted regular expression that triggers invalid write operations.(CVE-2018-18312)
perl: Perl before 5.26.3 has a buffer over-read via a crafted regular expression that triggers disclosure of sensitive information from process memory.(CVE-2018-18313)
perl: Perl before 5.26.3 has a buffer overflow via a crafted regular expression that triggers invalid write operations.(CVE-2018-18314)
perl: A heap buffer write overflow, with control over the bytes written, was found in the way regular expressions employing Unicode rules are compiled. An attacker, with the ability to provide a specially crafted regular expression, could crash the perl interpreter, or possibly execute arbitrary code.(CVE-2018-6797)
perl: A heap buffer over read flaw was found in the way Perl regular expression engine handled inputs with invalid UTF-8 characters. An attacker able to provide a specially crafted input to be matched against a regular expression could cause Perl interpreter to crash or disclose portion of its memory.(CVE-2018-6798)
perl: It was found that the pack() function in the 32-bit version of the perl interpreter was vulnerable to heap buffer overflow via the packing template. An attacker, able to provide a specially crafted template, could use this flaw to crash the interpreter.(CVE-2018-6913)
perl: bugfix
Solution:
For details on how to apply this update, which includes the changes described in this advisory, refer to:
http://security.gd-linux.com/how_to_apply_patch.html
Remember the build tag is 6.06.01B6.