CVE-2021-37615— Null pointer dereference in Exiv2::Internal::resolveLens0x319
Quick assessment
Affected
Exiv2 exiv2
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.
Exiv2是Andreas Huggel个人开发者的一套用于管理图像元数据的C++库和命令行应用程序。该产品提供了读取和写入EXIF、IPTC和XMP等多种格式图像元数据的功能。 Exiv2 0.27.4之前版本存在代码问题漏洞，该漏洞源于软件中发现了空指针解引用。当使用Exiv2打印特制的图像文件的元数据时，会触发空指针解引用。攻击者可利用该漏洞可以诱骗受害者在一个特制的图像文件上运行Exiv2，那么攻击者可能会利用该漏洞导致拒绝服务。
Possible ATT&CK Techniques 1 AI
T1203 · Exploitation for Client Execution
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I. Basic Information for CVE-2021-37615
Vulnerability Information
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Vulnerability Title
Null pointer dereference in Exiv2::Internal::resolveLens0x319
Source: CVE Program / CVE List V5
Vulnerability Description
Exiv2 is a command-line utility and C++ library for reading, writing, deleting, and modifying the metadata of image files. A null pointer dereference was found in Exiv2 versions v0.27.4 and earlier. The null pointer dereference is triggered when Exiv2 is used to print the metadata of a crafted image file. An attacker could potentially exploit the vulnerability to cause a denial of service, if they can trick the victim into running Exiv2 on a crafted image file. Note that this bug is only triggered when printing the interpreted (translated) data, which is a less frequently used Exiv2 operation that requires an extra command line option (`-p t` or `-P t`). The bug is fixed in version v0.27.5.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:N/I:N/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
空指针解引用
Source: CVE Program / CVE List V5
Vulnerability Title
Exiv2 代码问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Exiv2是Andreas Huggel个人开发者的一套用于管理图像元数据的C++库和命令行应用程序。该产品提供了读取和写入EXIF、IPTC和XMP等多种格式图像元数据的功能。 Exiv2 0.27.4之前版本存在代码问题漏洞，该漏洞源于软件中发现了空指针解引用。当使用Exiv2打印特制的图像文件的元数据时，会触发空指针解引用。攻击者可利用该漏洞可以诱骗受害者在一个特制的图像文件上运行Exiv2，那么攻击者可能会利用该漏洞导致拒绝服务。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)
Affected Products
II. Public POCs for CVE-2021-37615
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Patches & Fixes for CVE-2021-37615 (1)
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https://github.com/Exiv2/exiv2/pull/1758 x_refsource_MISC
Vendor Advisories for CVE-2021-37615 (2)
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https://github.com/Exiv2/exiv2/security/advisories/GHSA-h9x9-4f77-336w x_refsource_CONFIRM
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https://security.gentoo.org/glsa/202312-06 vendor-advisory
Mailing List Discussions for CVE-2021-37615 (2)
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https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/UYGDELIFFJWKUU7SO3QATCIXCZJERGAC/ vendor-advisory x_refsource_FEDORA
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https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/FMDT4PJB7P43WSOM3TRQIY3J33BAFVVE/ vendor-advisory x_refsource_FEDORA
Same Patch Batch · Exiv2 · 2021-08-09 · 11 CVEs total
| CVE-2021-32815 | 5.5 MEDIUM | Denial of service due to assertion failure in crwimage_int.cpp |
| CVE-2021-34334 | 5.5 MEDIUM | Denial of service due to integer overflow in loop counter |
| CVE-2021-37616 | 5.5 MEDIUM | Null pointer dereference in Exiv2::Internal::resolveLens0x8ff |
| CVE-2021-37621 | 5.5 MEDIUM | Denial of service due to infinite loop in Image::printIFDStructure |
| CVE-2021-37622 | 5.5 MEDIUM | Denial of service due to infinite loop in JpegBase::printStructure (#1) |
| CVE-2021-37623 | 5.5 MEDIUM | Denial of service due to infinite loop in JpegBase::printStructure (#2) |
| CVE-2021-34335 | 4.7 MEDIUM | Denial of service due to FPE in Exiv2::Internal::resolveLens0xffff |
| CVE-2021-37618 | 4.7 MEDIUM | Out-of-bounds read in Exiv2::Jp2Image::printStructure |
| CVE-2021-37619 | 4.7 MEDIUM | Out-of-bounds read in Exiv2::Jp2Image::encodeJp2Header |
| CVE-2021-37620 | 4.7 MEDIUM | Out-of-bounds read in XmpTextValue::read() |
IV. Related Vulnerabilities
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-
CVE-2026-25884
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CVE-2025-55304
Exiv2 has quadratic performance in ICC profile parsing in Jp -
CVE-2025-54080
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Same vendor: Exiv2
-
CVE-2026-25884
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CVE-2026-27596
Exiv2: Integer Underflow in LoaderNative::getData() Causes H -
CVE-2026-27631
Exiv2: Uncaught exception - cannot create std::vector larger -
CVE-2025-55304
Exiv2 has quadratic performance in ICC profile parsing in Jp -
CVE-2025-54080
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Same weakness: CWE-476
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V. Comments for CVE-2021-37615
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