ghsa-7mv4-9v7r-5gq3
Vulnerability from github
Published
2022-05-24 17:14
Modified
2022-05-24 17:14
Details
An issue was discovered in Squid through 4.7. When Squid is parsing ESI, it keeps the ESI elements in ESIContext. ESIContext contains a buffer for holding a stack of ESIElements. When a new ESIElement is parsed, it is added via addStackElement. addStackElement has a check for the number of elements in this buffer, but it's off by 1, leading to a Heap Overflow of 1 element. The overflow is within the same structure so it can't affect adjacent memory blocks, and thus just leads to a crash while processing.
{ "affected": [], "aliases": [ "CVE-2019-12521" ], "database_specific": { "cwe_ids": [ "CWE-787" ], "github_reviewed": false, "github_reviewed_at": null, "nvd_published_at": "2020-04-15T19:15:00Z", "severity": "MODERATE" }, "details": "An issue was discovered in Squid through 4.7. When Squid is parsing ESI, it keeps the ESI elements in ESIContext. ESIContext contains a buffer for holding a stack of ESIElements. When a new ESIElement is parsed, it is added via addStackElement. addStackElement has a check for the number of elements in this buffer, but it\u0027s off by 1, leading to a Heap Overflow of 1 element. The overflow is within the same structure so it can\u0027t affect adjacent memory blocks, and thus just leads to a crash while processing.", "id": "GHSA-7mv4-9v7r-5gq3", "modified": "2022-05-24T17:14:19Z", "published": "2022-05-24T17:14:19Z", "references": [ { "type": "ADVISORY", "url": "https://nvd.nist.gov/vuln/detail/CVE-2019-12521" }, { "type": "WEB", "url": "https://gitlab.com/jeriko.one/security/-/blob/master/squid/CVEs/CVE-2019-12521.txt" }, { "type": "WEB", "url": "https://lists.debian.org/debian-lts-announce/2020/07/msg00009.html" }, { "type": "WEB", "url": "https://security.gentoo.org/glsa/202005-05" }, { "type": "WEB", "url": "https://security.netapp.com/advisory/ntap-20210205-0006" }, { "type": "WEB", "url": "https://usn.ubuntu.com/4356-1" }, { "type": "WEB", "url": "https://www.debian.org/security/2020/dsa-4682" }, { "type": "WEB", "url": "http://lists.opensuse.org/opensuse-security-announce/2020-05/msg00018.html" }, { "type": "WEB", "url": "http://www.openwall.com/lists/oss-security/2020/04/23/1" } ], "schema_version": "1.4.0", "severity": [] }
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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.
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- 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.