GHSA-7553-jr98-vx47 CVE-2020-7595
libxml as used in Nokogiri has an infinite loop in a certain end-of-file situation
- Severity
- 7.5 / 10
- High · CVSS 3.1
- Exploit chance (EPSS)
- 7.84%
- Chance of exploitation in the next 30 days. Higher than 94.68% of scored vulnerabilities.
- Known exploited
- No
- Not in CISA's catalog
- Weakness
- CWE-835 Loop with Unreachable Exit Condition ('Infinite Loop')
- Fix
1.10.8- Upgrade nokogiri to this version or later
Description
xmlStringLenDecodeEntities in parser.c in libxml2 2.9.10 has an infinite loop in a certain end-of-file situation. The Nokogiri RubyGem has patched its vendored copy of libxml2 in order to prevent this issue from affecting nokogiri.
Affected versions
RubyGems
| Package | Vulnerable | Fixed in |
|---|---|---|
| nokogiri | < 1.10.8 |
1.10.8 |
How to fix
Move to the fixed version or later with your package manager, update the lockfile, and run your tests. If the package only arrives through another dependency, upgrade that dependency first. If none of its releases pulls a fixed version yet, force the version with your package manager's override.
nokogiri RubyGems → 1.10.8
- bundler
bundle update nokogiri # Gemfile: gem "nokogiri", ">= 1.10.8"
Severity breakdown
CVSS 3.1 7.5
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- Attack vector
- Network
- Attack complexity
- Low
- Privileges required
- None
- User interaction
- None
- Scope
- Unchanged
- Confidentiality
- None
- Integrity
- None
- Availability
- High
Weakness
CWE-835: Loop with Unreachable Exit Condition ('Infinite Loop')
The product contains an iteration or loop with an exit condition that cannot be reached, i.e., an infinite loop.
References
Advisories
Packages
Other links
- github.com/sparklemotion/nokogiri/issues/1992
- oracle.com/security-alerts/cpuoct2021.html
- oracle.com/security-alerts/cpujul2022.html
- oracle.com/security-alerts/cpujul2020.html
- oracle.com/security-alerts/cpuapr2022.html
- usn.ubuntu.com/4274-1
- us-cert.cisa.gov/ics/advisories/icsa-21-103-08
- security.netapp.com/advisory/ntap-20200702-0005
- security.gentoo.org/glsa/202010-04
- lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/JDPF3…
- lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/5R55Z…
- lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/545SP…
- lists.debian.org/debian-lts-announce/2020/09/msg00009.html
- gitlab.gnome.org/GNOME/libxml2/commit/0e1a49c89076
- github.com/rubysec/ruby-advisory-db/blob/master/gems/nokogiri/CVE-2020-7595.yml
- cert-portal.siemens.com/productcert/pdf/ssa-292794.pdf
- lists.opensuse.org/opensuse-security-announce/2020-05/msg00047.html
Timeline
- Published
- Last updated by the source
- Latest EPSS score
Related advisories
| Advisory | Severity | Why it's related |
|---|---|---|
| GHSA-phwj-rprq-35pp Nokogiri: Possible Use-After-Free when setting an attribute value via `Nokogiri::XML::Attr#value=` or `#content=` | High | Also affects nokogiri |
| GHSA-wfpw-mmfh-qq69 Nokogiri: Possible Use-After-Free in XInclude Processing | Low | Also affects nokogiri |
| GHSA-p67v-3w7g-wjg7 Nokogiri: Possible Use-After-Free when directly using `NokogirI::XML::XPathContext` beyond document lifetime | Medium | Also affects nokogiri |
| GHSA-wjv4-x9w8-wm3h Nokogiri: Possible Use-After-Free when setting `Document#root=` to an invalid node type | Medium | Also affects nokogiri |
| GHSA-5prr-v3j2-97mh Nokogiri: Possible Out-of-Bounds Read in `Nokogiri::XML::NodeSet#[]` | High | Also affects nokogiri |
| GHSA-9cv2-cfxc-v4v2 Nokogiri: Null Pointer Dereference calling methods on uninitialized wrapper classes | High | Also affects nokogiri |
| GHSA-8678-w3jw-xfc2 Nokogiri: XML::Schema on JRuby allows network requests when NONET is set, bypassing CVE-2020-26247 | Low | Also affects nokogiri |
| GHSA-5v8h-3h3q-446p Nokogiri: Possible Use-After-Free when `Nokogiri::XML::Document#encoding=` raises an exception | High | Also affects nokogiri |
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