CVE-2024-61977.5HighCWE-590

CVE-2024-6197: freeing stack buffer in utf8asn1str

curl

Affected: curl · Exploitation: possible (1 to 10%)

Not in CyberSIXT coverage yet: no article names this CVE. This page shows the public record.

4.3%probability of exploitation in the next 30 days

91st percentile

050100

Higher than 91% of scored CVEs

7.5HighCVSS 3.1

LowMediumHighCrit.

DescriptionCVE.org

libcurl's ASN1 parser has this utf8asn1str() function used for parsing an ASN.1 UTF-8 string. Itcan detect an invalid field and return error. Unfortunately, when doing so it also invokes `free()` on a 4 byte localstack buffer. Most modern malloc implementations detect this error and immediately abort. Some however accept the input pointer and add that memory to its list of available chunks. This leads to the overwriting of nearby stack memory. The content of the overwrite is decided by the `free()` implementation; likely to be memory pointers and a set of flags. The most likely outcome of exploting this flaw is a crash, although it cannot be ruled out that more serious results can be had in special circumstances.

Affected products1

From the CVE record. A product or version that is not listed is unknown, not unaffected.

curl · curlfrom 8.8.0 up to and including 8.8.0; from 8.7.1 up to and including 8.7.1; from 8.7.0 up to and including 8.7.0; from 8.6.0 up to and including 8.6.0

On the Atlas

Every published CVE is on the CyberSIXT Atlas, grouped by weakness, vendor and month.

Open the Atlas

Exploitation: Possible (1 to 10%). EPSS between 1% and 10%.
CISA KEV: Not listed
Public check: No public nuclei template
Weakness: Free of Memory not on the Heap · Memory Corruption
Vendor: curl
Published: July 2024
Band: Possible (1 to 10%), July 2024
Bounty reports: 2 disclosed on HackerOne

Disclosed bug bounty reports about CVE-2024-6197

The reports on HackerOne that name this CVE, with HackerOne's own outcome. Titles and metadata only.

CVE-2024-6197: freeing stack buffer in utf8asn1strcurl · 2024 · medium severityValid
libcurl: freeing stack buffer during x509 certificate parsingInternet Bug Bounty · 2024 · medium severityValid

CoverageNo articles yet

No CyberSIXT article names CVE-2024-6197 yet, so there is no coverage timeline, action brief or change log for it. Everything on this page comes from the public CVE record, CISA KEV, EPSS and the nuclei template index. Search the archive or see the CVEs in the news.