Security Bulletin: Vulnerabilities in libxml2 may affect IBM Storage Archive

Vulnerability Details

CVEID:   CVE-2017-9047
DESCRIPTION:   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.
CWE:   CWE-119: Improper Restriction of Operations within the Bounds of a Memory Buffer
CVSS Source:   IBM X-Force
CVSS Base score:   5.9
CVSS Vector:   (CVSS:3.0/AV:L/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L)

CVEID:   CVE-2017-0663
DESCRIPTION:   A remote code execution vulnerability in libxml2 could enable an attacker using a specially crafted file to execute arbitrary code within the context of an unprivileged process. This issue is rated as High due to the possibility of remote code execution in an application that uses this library. Product: Android. Versions: 4.4.4, 5.0.2, 5.1.1, 6.0, 6.0.1, 7.0, 7.1.1, 7.1.2. Android ID: A-37104170.
CWE:   CWE-787: Out-of-bounds Write
CVSS Source:   IBM X-Force
CVSS Base score:   7.8
CVSS Vector:   (CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H)

CVEID:   CVE-2017-18258
DESCRIPTION:   The xz_head function in xzlib.c in libxml2 before 2.9.6 allows remote attackers to cause a denial of service (memory consumption) via a crafted LZMA file, because the decoder functionality does not restrict memory usage to what is required for a legitimate file.
CWE:   CWE-770: Allocation of Resources Without Limits or Throttling
CVSS Source:   IBM X-Force
CVSS Base score:   5.5
CVSS Vector:   (CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H)

CVEID:   CVE-2020-3846
DESCRIPTION:   A buffer overflow was addressed with improved size validation. This issue is fixed in iOS 13.3.1 and iPadOS 13.3.1, macOS Catalina 10.15.3, tvOS 13.3.1, watchOS 6.1.2, iTunes for Windows 12.10.4, iCloud for Windows 11.0, iCloud for Windows 7.17. Processing maliciously crafted XML may lead to an unexpected application termination or arbitrary code execution.
CWE:   CWE-20: Improper Input Validation
CVSS Source:   IBM X-Force
CVSS Base score:   7.8
CVSS Vector:   (CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H)

CVEID:   CVE-2020-24977
DESCRIPTION:   GNOME project libxml2 v2.9.10 has a global buffer over-read vulnerability in xmlEncodeEntitiesInternal at libxml2/entities.c. The issue has been fixed in commit 50f06b3e.
CWE:   CWE-125: Out-of-bounds Read
CVSS Source:   IBM X-Force
CVSS Base score:   7.8
CVSS Vector:   (CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H)

CVEID:   CVE-2017-15412
DESCRIPTION:   Use after free in libxml2 before 2.9.5, as used in Google Chrome prior to 63.0.3239.84 and other products, allowed a remote attacker to potentially exploit heap corruption via a crafted HTML page.
CWE:   CWE-416: Use After Free
CVSS Source:   IBM X-Force
CVSS Base score:   6.3
CVSS Vector:   (CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:L)

CVEID:   CVE-2017-16932
DESCRIPTION:   parser.c in libxml2 before 2.9.5 does not prevent infinite recursion in parameter entities.
CWE:   CWE-835: Loop with Unreachable Exit Condition ('Infinite Loop')
CVSS Source:   IBM X-Force
CVSS Base score:   7.5
CVSS Vector:   (CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H)

CVEID:   CVE-2021-3537
DESCRIPTION:   A vulnerability found in libxml2 in versions before 2.9.11 shows that it did not propagate errors while parsing XML mixed content, causing a NULL dereference. If an untrusted XML document was parsed in recovery mode and post-validated, the flaw could be used to crash the application. The highest threat from this vulnerability is to system availability.
CWE:   CWE-476: NULL Pointer Dereference
CVSS Source:   IBM X-Force
CVSS Base score:   7.5
CVSS Vector:   (CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H)

CVEID:   CVE-2019-19956
DESCRIPTION:   xmlParseBalancedChunkMemoryRecover in parser.c in libxml2 before 2.9.10 has a memory leak related to newDoc->oldNs.
CWE:   CWE-401: Missing Release of Memory after Effective Lifetime
CVSS Source:   IBM X-Force
CVSS Base score:   3.3
CVSS Vector:   (CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L)

CVEID:   CVE-2016-4658
DESCRIPTION:   xpointer.c in libxml2 before 2.9.5 (as used in Apple iOS before 10, OS X before 10.12, tvOS before 10, and watchOS before 3, and other products) does not forbid namespace nodes in XPointer ranges, which allows remote attackers to execute arbitrary code or cause a denial of service (use-after-free and memory corruption) via a crafted XML document.
CWE:   CWE-119: Improper Restriction of Operations within the Bounds of a Memory Buffer
CVSS Source:   IBM X-Force
CVSS Base score:   9.8
CVSS Vector:   (CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H)

CVEID:   CVE-2018-14404
DESCRIPTION:   A NULL pointer dereference vulnerability exists in the xpath.c:xmlXPathCompOpEval() function of libxml2 through 2.9.8 when parsing an invalid XPath expression in the XPATH_OP_AND or XPATH_OP_OR case. Applications processing untrusted XSL format inputs with the use of the libxml2 library may be vulnerable to a denial of service attack due to a crash of the application.
CWE:   CWE-476: NULL Pointer Dereference
CVSS Source:   IBM X-Force
CVSS Base score:   3.3
CVSS Vector:   (CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L)

CVEID:   CVE-2017-9049
DESCRIPTION:   libxml2 20904-GITv2.9.4-16-g0741801 is vulnerable to a heap-based buffer over-read in the xmlDictComputeFastKey function in dict.c. This vulnerability causes programs that use libxml2, such as PHP, to crash. This vulnerability exists because of an incomplete fix for libxml2 Bug 759398.
CWE:   CWE-125: Out-of-bounds Read
CVSS Source:   IBM X-Force
CVSS Base score:   5.9
CVSS Vector:   (CVSS:3.0/AV:L/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L)

CVEID:   CVE-2021-3517
DESCRIPTION:   There is a flaw in the xml entity encoding functionality of libxml2 in versions before 2.9.11. An attacker who is able to supply a crafted file to be processed by an application linked with the affected functionality of libxml2 could trigger an out-of-bounds read. The most likely impact of this flaw is to application availability, with some potential impact to confidentiality and integrity if an attacker is able to use memory information to further exploit the application.
CWE:   CWE-787: Out-of-bounds Write
CVSS Source:   IBM X-Force
CVSS Base score:   8.6
CVSS Vector:   (CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:H)

CVEID:   CVE-2018-14567
DESCRIPTION:   libxml2 2.9.8, if --with-lzma is used, allows remote attackers to cause a denial of service (infinite loop) via a crafted XML file that triggers LZMA_MEMLIMIT_ERROR, as demonstrated by xmllint, a different vulnerability than CVE-2015-8035 and CVE-2018-9251.
CWE:   CWE-835: Loop with Unreachable Exit Condition ('Infinite Loop')
CVSS Source:   IBM X-Force
CVSS Base score:   3.3
CVSS Vector:   (CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L)

CVEID:   CVE-2017-16931
DESCRIPTION:   parser.c in libxml2 before 2.9.5 mishandles parameter-entity references because the NEXTL macro calls the xmlParserHandlePEReference function in the case of a '%' character in a DTD name.
CWE:   CWE-119: Improper Restriction of Operations within the Bounds of a Memory Buffer
CVSS Source:   IBM X-Force
CVSS Base score:   7.3
CVSS Vector:   (CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L)

CVEID:   CVE-2018-9466
DESCRIPTION:   In the xmlSnprintfElementContent function of valid.c, there is a possible out of bounds write. This could lead to remote escalation of privilege in an unprivileged app with no additional execution privileges needed. User interaction is needed for exploitation.
CWE:   CWE-787: Out-of-bounds Write
CVSS Source:   IBM X-Force
CVSS Base score:   8.8
CVSS Vector:   (CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H)

CVEID:   CVE-2017-8872
DESCRIPTION:   The htmlParseTryOrFinish function in HTMLparser.c in libxml2 2.9.4 allows attackers to cause a denial of service (buffer over-read) or information disclosure.
CWE:   CWE-125: Out-of-bounds Read
CVSS Source:   IBM X-Force
CVSS Base score:   5.9
CVSS Vector:   (CVSS:3.0/AV:L/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L)

CVEID:   CVE-2022-23308
DESCRIPTION:   valid.c in libxml2 before 2.9.13 has a use-after-free of ID and IDREF attributes.
CWE:   CWE-416: Use After Free
CVSS Source:   IBM X-Force
CVSS Base score:   5.3
CVSS Vector:   (CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L)

CVEID:   CVE-2021-3518
DESCRIPTION:   There's a flaw in libxml2 in versions before 2.9.11. An attacker who is able to submit a crafted file to be processed by an application linked with libxml2 could trigger a use-after-free. The greatest impact from this flaw is to confidentiality, integrity, and availability.
CWE:   CWE-416: Use After Free
CVSS Source:   IBM X-Force
CVSS Base score:   8.6
CVSS Vector:   (CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:H)

CVEID:   CVE-2017-9048
DESCRIPTION:   libxml2 20904-GITv2.9.4-16-g0741801 is vulnerable to a stack-based buffer overflow. The function xmlSnprintfElementContent in valid.c is supposed to recursively dump the element content definition into a char buffer 'buf' of size 'size'. At the end of the routine, the function may strcat two more characters without checking whether the current strlen(buf) + 2 < size. This vulnerability causes programs that use libxml2, such as PHP, to crash.
CWE:   CWE-119: Improper Restriction of Operations within the Bounds of a Memory Buffer
CVSS Source:   IBM X-Force
CVSS Base score:   5.9
CVSS Vector:   (CVSS:3.0/AV:L/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L)

CVEID:   CVE-2016-5131
DESCRIPTION:   Use-after-free vulnerability in libxml2 through 2.9.4, as used in Google Chrome before 52.0.2743.82, allows remote attackers to cause a denial of service or possibly have unspecified other impact via vectors related to the XPointer range-to function.
CWE:   CWE-416: Use After Free
CVSS Source:   IBM X-Force
CVSS Base score:   6.3
CVSS Vector:   (CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:L)

CVEID:   CVE-2017-7375
DESCRIPTION:   A flaw in libxml2 allows remote XML entity inclusion with default parser flags (i.e., when the caller did not request entity substitution, DTD validation, external DTD subset loading, or default DTD attributes). Depending on the context, this may expose a higher-risk attack surface in libxml2 not usually reachable with default parser flags, and expose content from local files, HTTP, or FTP servers (which might be otherwise unreachable).
CWE:   CWE-611: Improper Restriction of XML External Entity Reference
CVSS Source:   IBM X-Force
CVSS Base score:   6.5
CVSS Vector:   (CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:L)

CVEID:   CVE-2021-3541
DESCRIPTION:   A flaw was found in libxml2. Exponential entity expansion attack its possible bypassing all existing protection mechanisms and leading to denial of service.
CWE:   CWE-776: Improper Restriction of Recursive Entity References in DTDs ('XML Entity Expansion')
CVSS Source:   IBM X-Force
CVSS Base score:   6.5
CVSS Vector:   (CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H)

CVEID:   CVE-2022-29824
DESCRIPTION:   In libxml2 before 2.9.14, several buffer handling functions in buf.c (xmlBuf*) and tree.c (xmlBuffer*) don't check for integer overflows. This can result in out-of-bounds memory writes. Exploitation requires a victim to open a crafted, multi-gigabyte XML file. Other software using libxml2's buffer functions, for example libxslt through 1.1.35, is affected as well.
CWE:   CWE-190: Integer Overflow or Wraparound
CVSS Source:   IBM X-Force
CVSS Base score:   5.5
CVSS Vector:   (CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H)

CVEID:   CVE-2017-9050
DESCRIPTION:   libxml2 20904-GITv2.9.4-16-g0741801 is vulnerable to a heap-based buffer over-read in the xmlDictAddString function in dict.c. This vulnerability causes programs that use libxml2, such as PHP, to crash. This vulnerability exists because of an incomplete fix for CVE-2016-1839.
CWE:   CWE-125: Out-of-bounds Read
CVSS Source:   IBM X-Force
CVSS Base score:   5.9
CVSS Vector:   (CVSS:3.0/AV:L/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L)

CVEID:   CVE-2019-20388
DESCRIPTION:   xmlSchemaPreRun in xmlschemas.c in libxml2 2.9.10 allows an xmlSchemaValidateStream memory leak.
CWE:   CWE-401: Missing Release of Memory after Effective Lifetime
CVSS Source:   IBM X-Force
CVSS Base score:   3.3
CVSS Vector:   (CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N)