rhsa-2021_4907
Vulnerability from csaf_redhat
Published
2021-12-01 22:28
Modified
2024-11-06 00:12
Summary
Red Hat Security Advisory: nss security update
Notes
Topic
An update for nss is now available for Red Hat Enterprise Linux 6 Extended Lifecycle Support.
Red Hat Product Security has rated this update as having a security impact of Critical. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.
Details
Network Security Services (NSS) is a set of libraries designed to support the cross-platform development of security-enabled client and server applications.
Security Fix(es):
* nss: Memory corruption in decodeECorDsaSignature with DSA signatures (and RSA-PSS) (CVE-2021-43527)
For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.
Terms of Use
This content is licensed under the Creative Commons Attribution 4.0 International License (https://creativecommons.org/licenses/by/4.0/). If you distribute this content, or a modified version of it, you must provide attribution to Red Hat Inc. and provide a link to the original.
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"text": "nss: Memory corruption in decodeECorDsaSignature with DSA signatures (and RSA-PSS)",
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"text": "The issue is not limited to TLS. Any applications that use NSS certificate verification are vulnerable; S/MIME is impacted as well. Similarly, a server application compiled with NSS, which processes client certificates, can receive a malicious certificate via a client.\n\nFirefox is not vulnerable to this flaw as it uses the mozilla::pkix for certificate verification. Thunderbird is affected when parsing email with the S/MIME signature. Thunderbird on Red Hat Enterprise Linux 8.4 and later does not need to be updated since it uses the system NSS library, but earlier Red Hat Enterprise Linux 8 extended life streams will need to update Thunderbird as well as NSS.",
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"text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product\u0027s status, and are included for informational purposes to better understand the severity of this vulnerability.",
"title": "CVSS score applicability"
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"category": "external",
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"url": "https://nvd.nist.gov/vuln/detail/CVE-2021-43527"
},
{
"category": "external",
"summary": "https://googleprojectzero.blogspot.com/2021/12/this-shouldnt-have-happened.html",
"url": "https://googleprojectzero.blogspot.com/2021/12/this-shouldnt-have-happened.html"
},
{
"category": "external",
"summary": "https://www.mozilla.org/en-US/security/advisories/mfsa2021-51/",
"url": "https://www.mozilla.org/en-US/security/advisories/mfsa2021-51/"
}
],
"release_date": "2021-12-01T16:00:00+00:00",
"remediations": [
{
"category": "vendor_fix",
"date": "2021-12-01T22:28:50+00:00",
"details": "For details on how to apply this update, which includes the changes described in this advisory, refer to:\n\nhttps://access.redhat.com/articles/11258\n\nAfter installing this update, applications using NSS (for example, Firefox) must be restarted for this update to take effect.",
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"restart_required": {
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"url": "https://access.redhat.com/errata/RHSA-2021:4907"
},
{
"category": "workaround",
"details": "Red Hat has investigated whether a possible mitigation exists for this issue, and has not been able to identify a practical example. Please update the affected package as soon as possible.",
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{
"cvss_v3": {
"attackComplexity": "LOW",
"attackVector": "NETWORK",
"availabilityImpact": "HIGH",
"baseScore": 9.8,
"baseSeverity": "CRITICAL",
"confidentialityImpact": "HIGH",
"integrityImpact": "HIGH",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
"version": "3.1"
},
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"threats": [
{
"category": "impact",
"details": "Critical"
}
],
"title": "nss: Memory corruption in decodeECorDsaSignature with DSA signatures (and RSA-PSS)"
}
]
}
Loading...
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- Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
- Confirmed: The vulnerability is confirmed from an analyst perspective.
- Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
- Patched: This vulnerability was successfully patched by the user reporting the sighting.
- Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
- Not confirmed: The user expresses doubt about the veracity of the vulnerability.
- Not patched: This vulnerability was not successfully patched by the user reporting the sighting.